2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

new rebuild not starting

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Old Dec 18, 2005 | 05:27 PM
  #26  
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i will correct one thing though... an S5 will run with the AFM disconnected, i test drove a rebuild around the block.... sounded like a frickin bridgeport and i thought to myself: "holy ****, i didn't port it that much!?" but it would cut out with even slight throttle inputs.

S4 will idle like *** but die with any throttle input with the AFM disconnected.

edit: jacobs comment might have been aimed at the correct terminology of it being called a "coolant pressure tester", compression testing is a different term than pressure testing.

Last edited by RotaryEvolution; Dec 18, 2005 at 05:29 PM.
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Old Dec 18, 2005 | 05:28 PM
  #27  
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Originally Posted by iceblue
Coming from the dood that just got pwned!
i got pwned because you looked up some oldass post of mine about wheel studs? you beat them out with a hammer... ?? if you're gonna lookup my posts and try to punk me out, atleast use something good like "you blew 4 engines and you've done 4 rebuilds"

Originally Posted by iceblue
For the poster. It is common for new rebuilder to roll the coolant seals on install. Not saying it happened but you mentioned allot of white smoke. This is normal and generally fuel. However it can be coolant as well. A simple coolant compression tester would verify this for you to just give you a heads up on your motor if it is serious or nothing to worry about. They are just a RAD cap with a pump and gauge that pressurizes your system and allows you to verify leaks.
who ******* cares about coolant seals if he cant get the car running? he obviously has enough compression to get it to fire. he can worry about coolant seal problems after the car is running, since they obviously arent affecting his compression enough to keep it from firing.

Originally Posted by Karack
i will correct one thing though... an S5 will run with the AFM disconnected, i test drove a rebuild around the block.... sounded like a frickin bridgeport and i thought to myself: "holy ****, i didn't port it that much!?" but it would cut out with even slight throttle inputs.

S4 will idle like *** but die with any throttle input with the AFM disconnected.
yeah its almost like i've done that before or something... also, the dudes car is an s5, so i believe a massive vacuum leak is going to be more of a problem than the AFM, though it could be both.

Last edited by jacobcartmill; Dec 18, 2005 at 05:43 PM.
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Old Dec 18, 2005 | 05:35 PM
  #28  
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Originally Posted by Karack
i will correct one thing though... an S5 will run with the AFM disconnected, i test drove a rebuild around the block.... sounded like a frickin bridgeport and i thought to myself: "holy ****, i didn't port it that much!?" but it would cut out with even slight throttle inputs.
I would not know on a S5 to comment

Originally Posted by Karack
S4 will idle like *** but die with any throttle input with the AFM disconnected.
I believe that is not correct as there is no fuel. S4 inputs fuel wile cranking only then taken over from the AFM. After the fuel inputted from cranking is depleted the car should die. About 1.5 seconds or so after startup. However dDub did have a freak of nature that has been unexplained in this department.

Originally Posted by Karack
edit: jacobs comment might have been aimed at the correct terminology of it being called a "coolant pressure tester", compression testing is a different term than pressure testing.
I would like to think so but being as how he was bashing the idea I believe he was only after combustion pressure.
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Old Dec 18, 2005 | 05:39 PM
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Originally Posted by iceblue
I would like to think so but being as how he was bashing the idea I believe he was only after combustion pressure.


yes i was only after combustion pressure. you keep talking about coolant seals when his engine isnt even running... he can worry about that once his engine is running..

i'm just trying to say the entire coolant seal thing is irrelevant. his engine has fine compression; atleast enough to get the engine to fire over. know what i mean?

Last edited by jacobcartmill; Dec 18, 2005 at 05:42 PM.
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Old Dec 18, 2005 | 05:43 PM
  #30  
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I would say there's probably some stupid vac. line somewhere that's either disconnected or maybe has a leak... On top of a fresh rebuild that'll most likely run like crap for the first 20 minutes or so anyways.

I would carefully look around and inspect every vac. line. If you can't find anything I would start the car up and hold the revs at around 2k RPM's for around 20-30 minutes or so, just to eliminate the 'fresh rebuild' variable.. If you can get the car to hold a 1500-2000RPM idle, try the carb-cleaner spray trick and see if you can locate a vac. leak.
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Old Dec 18, 2005 | 05:47 PM
  #31  
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the freak of nature is that once an engine is started it can produce enough vacuum to draw fuel through the injectors running the fuel system off a negative pressure suction rather than high pressure, this is not ideal for good running conditions though and i learned this problem the hard way while installing an EMS where i could richen up the car enough to where it would run and idle fine but cut out after 4k or abrupt throttle inputs.

i had the look of blue helmut wearing funny looking guy when i installed the fuel pressure gauge and saw 0 on the needle but the engine running fine.
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Old Dec 18, 2005 | 05:47 PM
  #32  
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Originally Posted by iceblue
No FC has a MAF they have a AFM and a calculated temp sensor to create a MAF reading.
Oh c'mon iceblue, Karack beat me to it. An AFM is a MAF. Lets stop the terminolgy battles ok. Enough people have been proven wrong.

Back to Philips' problem. Anyone know what the black connector is. I jsut saw it on a harness I have, but I haven't been "inside" of a S5 in a while. Also, for some reason, my S5 FSM doesn't have wiring diagrams. The wire green with a black strip, in a black cover, with a black round connector. It's also on the "branch" of wires that have the green connector that connects to the back of the waterpump.

Philip, can you post the other details, about the slugde, and the white/grey smoke?

Edit: This motor was rebuilt about a year ago, and has sat for a year. The builder informed Philip that he rotated the motor and added a preventative oil to the chambers while it was sitting.

Last edited by bigdv519; Dec 18, 2005 at 05:50 PM.
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Old Dec 18, 2005 | 05:51 PM
  #33  
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Actually
you can run NO AFM on FC.
HKS VPC or MAFCOMP

really iceblue, how many FCs have you worked on? You are in no position to argue with Karack. Just a few months ago, you weren't sure which hose is for powerbrakes... you have NEVER rebuilt a 13B and I am not even sure if your swap runs.

My S5 will start and idle without an AFM. It is "driveable" from garage to street to driveway, etc.

Last edited by slpin; Dec 18, 2005 at 05:54 PM.
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Old Dec 18, 2005 | 05:54 PM
  #34  
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asdoijasdoijasoidj

Last edited by jacobcartmill; Dec 18, 2005 at 06:01 PM.
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Old Dec 18, 2005 | 05:55 PM
  #35  
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Originally Posted by Karack
the freak of nature is that once an engine is started it can produce enough vacuum to draw fuel through the injectors running the fuel system off a negative pressure suction rather than high pressure, this is not ideal for good running conditions though and i learned this problem the hard way while installing an EMS where i could richen up the car enough to where it would run and idle fine but cut out after 4k or abrupt throttle inputs.

i had the look of blue helmut wearing funny looking guy when i installed the fuel pressure gauge and saw 0 on the needle but the engine running fine.

Do you believe that was dDub's situation?
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Old Dec 18, 2005 | 05:58 PM
  #36  
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damn you guys are making me feel guilty for starting this all over something i was wrong in terminology for in the first place....

KNOCK IT OFF!


edit: i didn't see dDub's post but it could be a possibility.
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Old Dec 18, 2005 | 06:04 PM
  #37  
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anyways, back to our buddy phillip here.


Originally Posted by jacobcartmill

phillip:
1. do a compression test to verify you have enough compression to get the engine started. if you dont, put some motor oil (or maybe something thinner like MMO or tcw3 2cycle premix) into the spark plug holes to raise the compression. if that doesnt work, try pullstarting the car... you can make alot more compression when you're pulling the car around at 2000rpms than you can cranking it at 300rpms. i'm guessing it has enough compression to get it started since you said it once started and died...
2. check the AFM and make sure its plugged in. you can run a car without the AFM but it will run like total dogshit. a fresh rebuild probably wont even run without the AFM (would probably crank up then just die), so i'd check that first.
3. dont worry about the coolant seals. unless you have abnormal pressure in the coolant system (which can be checked easily once the car is running) they are probably fine.
4. the timing is probably fine.
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Old Dec 18, 2005 | 06:34 PM
  #38  
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bigdv519 --The terminology is of 2 completely different items and aspects of technology. And should be drop as it was discussed from karack and me

slpin Actually
you can run NO AFM on FC.
HKS VPC or MAFCOMP

really iceblue, how many FCs have you worked on? You are in no position to argue with Karack. Just a few months ago, you weren't sure which hose is for powerbrakes... you have NEVER rebuilt a 13B and I am not even sure if your swap runs.

--Now that’s just ignorant. A VPC is something very rare and along no way the stock form thus irrelevant.

My S5 will start and idle without an AFM. It is "driveable" from garage to street to driveway, etc.

--Hmm last I saw the S5 discussion was left un noted from me for a reason. Try again plz.

really iceblue, how many FCs have you worked on?
--7 now

--Maybe you should review my work and pay more attention and stop getting schooled. There is actual vids and forum members who have drove in that FC. It has also undergone much more work then you have performed on yours. Come to think about it the car has received several magazine requests from local shows hmmm :-/

Last edited by iceblue; Dec 18, 2005 at 06:36 PM.
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Old Dec 18, 2005 | 06:52 PM
  #39  
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i can assure you.
ask ANYONE here.
they would have me work on their car many times before they would even let you put gas in theirs.

i guess you dont know much about my car if you think you have done more work.

your "work" to me is merely, been there, done that.

HKS VPC is NOT rare and can be had all day on ebay for 200.
now compare that to the cost of an afc and an afm?
just because you are inexperience and know nothing......

coming from a town that has an average income of 25k yearly, it is no surprise you are stupid, rude and uneducated... i dont blame you....

i blame your father for not investing 25 cents for a condom.

Last edited by slpin; Dec 18, 2005 at 07:00 PM.
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Old Dec 18, 2005 | 07:01 PM
  #40  
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Originally Posted by iceblue
Completely incorrect! The car nor will any FC on stock EMS run without the AFM, EVER. The car will crank and instantly die as well the fuel pump switch is in the AFM so the car will no longer have a running fuel pump.

the bold text shows "any FC" which includes s4's i would think.
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Old Dec 18, 2005 | 07:04 PM
  #41  
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an update with pics!

ok, first off thanks to all that have given me ideas and sugesstions. the thing attached to the bottom of the air box, whatever you want to call it, is plugged in. I just did the ghetto compression test and got 110+ psi on rear rotor and 95ish on front. that does not mean that all faces of all rotors have hight compression but at least the engine is good for something. at the bottom is a picture of the plug that Bigdv described that i cannot find a home for. also i have not bolted the full exause system on, some very dark liquid dripps out of the exauhst while running, it could be due to the thick grease like stuff that was in the motor earlyer or it couls be unbernt gas or it could be oil, i'm not shure. Also i used the old rubber dougnut peaces which surround the fuel ingector, i did not know that they were supposed to be really squishy when i put them on. this could be a cause of a vaccume leak (i guess). Ok, so is there any more sugesstions before i pull the intake & emmisions control crap off again?
Thanks, Philip
Attached Thumbnails new rebuild not starting-dsc07139.jpg  
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Old Dec 18, 2005 | 07:18 PM
  #42  
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Originally Posted by slpin
i can assure you.
ask ANYONE here.
they would have me work on their car many times before they would even let you put gas in theirs.

i guess you dont know much about my car if you think you have done more work.

your "work" to me is merely, been there, done that.

HKS VPC is NOT rare and can be had all day on ebay for 200.
now compare that to the cost of an afc and an afm?
just because you are inexperience and know nothing......

coming from a town that has an average income of 25k yearly, it is no surprise you are stupid, rude and uneducated... i dont blame you....

i blame your father for not investing 25 cents for a condom.
Yea im sure you have done RHD conversion. Been there not done that is more like it. Dont speculate on income or anything you have no idea about.
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Old Dec 18, 2005 | 11:01 PM
  #43  
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Originally Posted by philiptompkins
ok, first off thanks to all that have given me ideas and sugesstions. the thing attached to the bottom of the air box, whatever you want to call it, is plugged in. I just did the ghetto compression test and got 110+ psi on rear rotor and 95ish on front. that does not mean that all faces of all rotors have hight compression but at least the engine is good for something. at the bottom is a picture of the plug that Bigdv described that i cannot find a home for. also i have not bolted the full exause system on, some very dark liquid dripps out of the exauhst while running, it could be due to the thick grease like stuff that was in the motor earlyer or it couls be unbernt gas or it could be oil, i'm not shure. Also i used the old rubber dougnut peaces which surround the fuel ingector, i did not know that they were supposed to be really squishy when i put them on. this could be a cause of a vaccume leak (i guess). Ok, so is there any more sugesstions before i pull the intake & emmisions control crap off again?
Thanks, Philip
IIRC that plug is for cars with auxilary fan. And it plugs on the waterpump housing..
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Old Dec 18, 2005 | 11:08 PM
  #44  
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where on the water pump does it plug into? bottom? front? i looked at the water pump before i put it on and could not see where it goes.... maybe i need to look again. well if that plug was in fact for the water pump i guess it would not really affect the running
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Old Dec 18, 2005 | 11:09 PM
  #45  
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Originally Posted by philiptompkins
where on the water pump does it plug into? bottom? front? i looked at the water pump before i put it on and could not see where it goes.... maybe i need to look again. well if that plug was in fact for the water pump i guess it would not really affect the running
Should be on the back next to the thermo sensor.
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Old Dec 18, 2005 | 11:17 PM
  #46  
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philip, some cars didnt have it. so dont go crazy if you dont have the plug on the back of the waterpump housing.
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Old Dec 18, 2005 | 11:22 PM
  #47  
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well i'm just trying to figure this out before i put the manifolds back on..... but maybe its just a nothing plug, i don't remember a plug like that while taking if apart though
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Old Dec 19, 2005 | 12:27 AM
  #48  
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Originally Posted by slpin
i can assure you.
ask ANYONE here.
they would have me work on their car many times before they would even let you put gas in theirs.
I wouldnt let you torque my lug nuts.

coming from a town that has an average income of 25k yearly, it is no surprise you are stupid, rude and uneducated... i dont blame you....

i blame your father for not investing 25 cents for a condom.
Sounds like some other members of this board.. Namely YOU.
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Old Dec 19, 2005 | 11:31 AM
  #49  
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Originally Posted by philiptompkins
well i'm just trying to figure this out before i put the manifolds back on..... but maybe its just a nothing plug, i don't remember a plug like that while taking if apart though
Its right next to the watertemp in back of the housing... If you dont have it then dont worry about it..
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Old Dec 19, 2005 | 11:34 AM
  #50  
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Originally Posted by slpin
i can assure you.
ask ANYONE here.
they would have me work on their car many times before they would even let you put gas in theirs.

i guess you dont know much about my car if you think you have done more work.

your "work" to me is merely, been there, done that.

HKS VPC is NOT rare and can be had all day on ebay for 200.
now compare that to the cost of an afc and an afm?
just because you are inexperience and know nothing......

coming from a town that has an average income of 25k yearly, it is no surprise you are stupid, rude and uneducated... i dont blame you....

i blame your father for not investing 25 cents for a condom.
The only way youll get a vpc for 200 is inconplete... And yes they are rare, see how many members are currently using one..
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