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

The most Amazingest problem of All

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Old Sep 27, 2004 | 04:23 PM
  #1  
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From: KC MF MO
The most Amazingest problem of All

Okay, ported motor, dropped it in, won't run... ECU throws no codes. It sparks at the right time, and injects gas, and actually compresses pretty good too. It leaks out of the headers and the oil thang isn't hooked up. Maybe one or two other things by the VDI aren't hooked up either, but like i said, no ECU error codes. That and I can't find what they connect to, so i'm not worried.
We tried to push start it. It coughed. We pushed it more. Then at the end, we pushed it back up the hill LoL.
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Old Sep 27, 2004 | 04:29 PM
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From: Rohnert Park CA
Is the problem the motor is ported and won't start???

or are you bitching that you pushed it up a hill???

who ported it? and what type of port???
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Old Sep 27, 2004 | 04:30 PM
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From: KC MF MO
IM PISSED THAT I HAD TO PUSH IT BACK UP THE HILL!
But, yeah, i was looking for some insight as to why it wouldn't start.

EDIT: didn't see that last line... I ported it... and it wasn't a first... and its a MASSIVE streetport. Because I'm not cool enough to bridgeport.
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Old Sep 27, 2004 | 05:19 PM
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From: KC MF MO
^^bumpage^^
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Old Sep 27, 2004 | 05:24 PM
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Vacuum leak maybe, one time I put my engine back together and it wouldn't hold idle even with the gas down, but it would rev up to 3000 before it died. First it was the afm not plugged in, next there was a hole on a tube that went to the intake from the afm.
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Old Sep 27, 2004 | 05:26 PM
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From: KC MF MO
okay, i'll be trying this in the near future... i replaced most of the vac hoses, but at this point i spose anythang is possible LoL...
any other ideas in the mean time? i'll be checkin back here periodically...
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Old Sep 27, 2004 | 06:10 PM
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From: Rohnert Park CA
what sort of compression are you getting??? at least 85 psi right???
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Old Sep 27, 2004 | 06:44 PM
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the way i found a massive vac leak on a buddies car that kept it from starting was to have him attempt to start it while i sprayed carb cleaner around the intake manifolds. when it got in the leaky spot the engine would sputter like it was finally catching and then die again afterwords.
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Old Sep 27, 2004 | 06:48 PM
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From: KC MF MO
awesome idea! i might try that...
actually, im gettin about 90 on one rotor and about 70 on the other... but since i've driven cars with blown motors i figure it should start... and i figure the new apex's prolly aren't completely seated yet either...
plus like i said, one of the conenctors out of the oil pan isn't connected due to lack of available connectors on the wiring harness side... plus the solenoid connector lookin thing isn't connected to the alt... but like i said, i'll fix this some weekend when i have time... i just wanna make sure i'm not gonna have to do any more work b4 it starts...
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Old Sep 27, 2004 | 08:51 PM
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From: OC
you said the 'oil thang' wasnt hooked up. are you premixing? did you block off the oil injection ports?
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Old Sep 27, 2004 | 09:51 PM
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From: KC MF MO
lol wasn't that a descriptive term? that was one of the connectors on the pan... the one towards the front of the car.
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Old Sep 27, 2004 | 10:38 PM
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From: KC MF MO
what do those do anyway?
and why won't she start?
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Old Sep 27, 2004 | 10:48 PM
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thats probably the oil level sensor. if its disconnected you should have a buzzer going off inside the gauge cluster.

if its not that i'm not sure what it could be (i just know my s5 only has 1 sensor in the oil pan)
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Old Sep 27, 2004 | 10:49 PM
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From: KC MF MO
ya, i spose one is level and one is prolly temp or somethin... and i don't have a buzzer going off which is a real pisser... but i dont think that would keep it from starting...
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Old Sep 27, 2004 | 10:55 PM
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does it catch and die instantly or does it not even catch?
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Old Sep 27, 2004 | 10:56 PM
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From: KC MF MO
SOMETIMES it "coughs" once... thats the best i've done so far thow
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Old Sep 28, 2004 | 01:59 AM
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Just like everyone has suggested already, it really sounds like a vacuum leak or the AFM is having issues (ie not hooked up maybe). My car has done the same behavior when I flooded it, or left a vacuum line off, or when I forgot to hook back up the AFM hehe. Have you messed with the AFM at all? Maybe you just need to stare at it really hard and threaten to replace it with a honda....can't hurt! ;p
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Old Sep 28, 2004 | 02:25 AM
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Yea afm maybe. If its not connected, well your car wont run worth ****.

finally, with the buzzer stuff. I had a coolant level buzzer go off on me a few times when I had the key in the on position. After about 5-10 seconds, the car would totally shut off and I had no power, I had to remove the battery for about 2 minutes and hook her back up again to get the car to start again.

So... if you have your buzzer goin off, find that problem first before you attempt anything else.
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Old Sep 28, 2004 | 10:20 AM
  #19  
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From: KC MF MO
AFM should work... it worked when i took the motor out LoL and ya it is hooked up...
i guess it could be a vac leak... but i'm having trouble finding it...
and no buzzers going off... thats what i was saying was weird that i missed some connector on the oil pan (oh ****, i didn't just put a s4 motor in an s5 did i? plans to check that when he gets home...) and no buzzing...
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Old Sep 28, 2004 | 03:08 PM
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From: OC
do the starting fluid trick. it sounds weird, but its actually a well respected technique.
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Old Sep 28, 2004 | 04:56 PM
  #21  
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From: KC MF MO
i'm not familiar with that...
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Old Sep 28, 2004 | 05:05 PM
  #22  
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From: OC
crank the car while a lucky assistant sprays starting fluid at various points near your motor. if the car begins to catch, youve found the source of at least 1 vacuum leak.
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Old Sep 28, 2004 | 06:42 PM
  #23  
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From: KC MF MO
ooh i know what that is...
we tried that with carb cleaner... and didn't find ****... what else could be wrong?
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Old Sep 29, 2004 | 12:37 PM
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From: OC
so it sounds to me like.. you need to check your motor to see if its series 5, b/c that would make a difference, and you need to hook up the alternator, check all of your grounds.
what it really sounds like is maybe youve just flooded the **** out of your motor and fouled some plugs, making it hard to start. may have to do a pull or push start.
so... start by pulling the plugs, check them for abnormal fouling, and put a tablespood of atf in each rotor housing, then with the egi fuse unhooked, crank the car a couple few times. reinstall fuse, and plugs then hope to god the car starts.
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Old Sep 30, 2004 | 03:28 PM
  #25  
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From: OC
so... lets start over. you have evidence of gas (wet plugs), you have evidence of spark... are the plugs new?
and it wont start. just cranks, and sometimes coughs. have you tried just feeding it starting fluid? will it start then? maybe your injectors hurting. even with the entire uim off of my car, it still sputtered a few times and almost started, so id make sure my tps, and afm worked first. are you using the right injectors? when you got the motor was it longblock or shortblock? if it was longblock.. look up the p# on the injectors. second.. any blown fuses? maybe you crossed some connections. just approach it logically.
is timing set correctly? make sure your set to TDC if your timing is off. thats a common mistake. fuel + spark at the wrong time will make a car not start.
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