Moses865

Let's get this out of the way, 88 GTU with a turbo swap s4, emissions delete, stock turbo, with 3 3/4 inch exhaust from turbo back, no cat converter, turbo fuel pump, a/c / heat delete, power steering delete, koyo rad, tein coil overs and lowered 4 inches or better best guess, 720cc secondary injectors and stock ecu

Now that that's out of the way, my panty dropper sounds good I think but I have no baseline for comparison, she could have been ported but P/O couldn't tell me. So I need to know how this set up sounds on paper, and more over, how it sounds running, so here is a link all comments are appreciated! Thanks and have fun boosting!!!

http://youtu.be/2RJZp1G5U4U

Moses865

So I believe that I'll just slap some stock injectors in the secondaries and see what that does. I have already cleaned the grounds, and that helped a little. It's still a little rough, and the fuel switch that was wired to the pump was running the pump to hard so I had to re do the factory wiring, and oh buddy did that help. Still rough but I can now rev some what freely past 3800 rpm which is more than I could do before.

So glad I can talk things out with myself, God knows what could happen if other people were involved in a conversation.

lduley

iTrader: (1)

If you would've described what symptoms or problems you were having more in detail other than "heres a video of how its running, tell me whats wrong" that would've helped. Thats like us telling you to put the phone closer so we can see whats wrong with it

Also, we do have lives, it sometimes takes longer than a day to get a response, this is a internet forum, not a 24/7 immediate response team

Moses865

Alright then I digress. Guess I'm not used to using a forum. Thanks for reading.

MidnightEmpire

Mine does the same thing (I have an N/A GXL) what has helped my idle run a bit less strange is either make it run a bit more rich or lean (on fuel) and I, either tighten or loosen the tps adjustment screw (I can't remember whether I tightened or loosend it right now) I don't know if it'll work for you but that's just my two bits

Moses865

Now that you mention it, I have been meaning to do that, but I'm a little nervous cause it's Kinda lopy around 1k

MidnightEmpire

Same goes for mine, but once I got the air:fuel fixed up a bit I noticed a huge improvement, again I say I don't know if it'll help your problem (as I am quite new to these cars too) but I know it helped me lol

Moses865

Ok so I figured it out. MASSIVE EXHAUSE MANIFOLD CRACK= car runs like ****, also cracked manifold in this case also meant cracked turbo where the manifold bolts to the turbo 😢.

All is well though I ordered a used ht-18 turbo with a ported wastegate and I have my eye on a used stock manifold, wish me luck!!!

Moses865

Also, I will be looking at getting my ecu fixed up by rtek....I'm thinking 1.7 so I can run my 720cc injectors with out worry.

Moses865

ok well just a little update to my woes.....i replaced my exhaust manifold with a jspec manifold i purchased from a user of this forum, replaced the turbo with one i liberated from another user of this forum, and began the wait for a warm day to bolt in the new equipment..... on the first start she billowed smoke from the turbo area...i was very worried! once she cooled down and was able to be tinkered with i got some rtv and created a seal around the water pipe from the turbo to the LIM....POOF no smoke. upon a thorough listen though i noticed a TIC TIC TIC from the turbo area....DAMN EXHAUST LEAKS!! so im currently back to square one. oh and before i replaced the turbo and manifold i could free rev in neutral all the way to red line. now it wants to hesitate at 4k WOT. what have i gotten into?

satch

iTrader: (1)

Could be a poor injector plug connection. Could also be a poor engine ground.

Moses865

OH MY GOD!!! The Incredible Satch has blessed my thread with his presence! Thanks for the heads up on the injector plug connection. Haven't checked that out yet, but I went through with a fine tooth comb and checked and re grounded all grounds. I have decided to just buy an rtek 1.8 and see if it makes a difference. And I also am liberating a fpr from another user to see if my fuel pressure issues go away. Thank you for the advice

misterstyx69

iTrader: (142)

If you are using the stock metal gasket from engine to manifold and you are encountering leaks,you can try a piece of Gasket that you get by the sheet to act as a 2nd gasket.
It's cheap and easy..I made a couple of them from a sheet of exhaust gasket material in the past and it seems to work good.
I'm not saying it's a replacement for a NEW gasket,I am saying it is good for in a pinch.

fdbeast

check for vacuum leaks at block off plates especially if you have cheap thin ones. while the engine is running, spray brake cleaner/carb cleaner in the suspected areas and listen for the idle to change.

Moses865

Ok guys thanks for the input, it's a beautiful day so I'll try the carb cleaner around block off plates. And is it a metal gasket sheet? I have never found anything other than the felt type of stuff, but I will look into it. I was thinking about going to pineapple racing and snagging a set of their graphite gaskets

Moses865

Ok so guys I re sealed all block off plates (they weren't the shitty thin ones) , I re checked injector connections, re checked intake manifold gasket, looked for leaks with small amounts of carb cleaner, and still nothing. Maybe my pre cat is just old and clogged and being a pos, thinking about creating a test pipe and tryin that out. After that fails cause I'm sure it will, I will move on to the boost sensor, tps, and Possibly just take the motor to rotary resurection and just pay him to rebuild and port. Who knows, he quoted me a good price and being a half hour away from a pro at that stuff is just added reassurance....

Moses865

Ok well after getting a new to me n333 ecu and ensuring that it wasn't toast I installed it, started the beast up and guess what....I am very naive in thinking that would actually solve my problem. But I have a new down pipe coming and a mid pipe. And a plethora of other parts. I believe what I will do is just pull the engine harness and clean up and re wire what needs re wired.
I'm starting to realize the head aches that these machines can be esp. If you are turboed. Is the pre cat clogged? Are my injectors working over board? Is my oil supposed to resemble primordial ooze, and wreak of fuel? Is my fuel pressure supposed to be 40 at idle and 50 when goosing it? What the ROYAL F**K!!!

lduley

iTrader: (1)

Welcome to days of our lives, rx7 edition lol

Moses865

Ok a here is another update... I did the ecu grounding as posted by HAILERS, for secondary stumble, and it did not help.....all that soldering and I was thoroughly pleased with my mad skilllllzzzz but again it didn't help. So I guess I will send my injectors off to be cleaned.

So after all I have gone through the only real progress I have made is getting the damn thing to start. But with the hesitation, high idle, loads of fuel in the oil pan, and guess what reared its ugly head again? What was it you ask?! Well it's the mother bleeping turbo, just smoking away. I guess I will go find comfort at the bottom of a ice cold beer.
Until next time.

lduley

iTrader: (1)

A? singular? Or do you mean A case of beer?

Moses865

A case. It's always a case after dealing with my rx-nightmare

Moses865

WHO THE **** DOES THIS! I found yet another issue, some idiot that owned my 7 well before I, decided that it was ok to shove an N/A injector in one of the primary injector slots on a TURBO rx7....result, a **** ton of issues.

Moses865

Ok so I slapped brand new vac hoses on the nightmare (my new pet name for my project) a new fpr and soldered up the hack job that had been done to the secondary injector plugs, and adjusted the TPS....result? At least under a no load situation I am now able to LIGHTLY rev all the way to red line and....drum roll....go WOT from 0. It is nice in the driveway, but I need to see how it does under load.

Moses865

UPDATE!!!!

So with a little help from the forum and some intuitive searching I came to a few conclusions about my rx7
#1..the p/o was a p.o.s. and when he did the engine swap, paid the lowest bidder..that leads me to...
#2..the swap went wrong when they decided to install a 88 t2 em harness into the 88 n/a body and said **** it to taking care of the wires that didn't match up. (I have done my best to correct it)
#3..The rx7 is the poster child of Murphy's law, I corrected the wire issue and now I have a 2k rpm wall that I just can't get past.

I currently have two suspected culprits, the AFM and/or the fuel pump. I checked the TPS, and she's dead on within spec, but the connectors on the harness might be a little corroded so I'll tackle that when I get a day off. And my fuel pump voltage is constant at idle or with the little bit of throttle I can apply. I'll also be swapping out the relay for it under the dash too before I go diving into the fuel tank again.....

One day my baby will be on the road but until then she is a project car and will be treated as such and get the correct attention when under the knife.

Sorry for the book but if anyone is reading this I have spent hours searching and probing and 90% of the time any advice I get on here is applied to my baby and makes her just a little better so any advice is appreciated.

satch

iTrader: (1)

How many miles does the gauge cluster show? And you can look at the FSM and it will give a pin out of the ECU with their respective voltage values which can then be compared to your readings to see if there is any discrepancy.

You also want to look at the Brown/Red wire of the boost sensor and see what voltage you have w/the key to on. It should read 2.3 to 2.7 volts. If it has like 12 volts then the wiring between the emission and front harness is not correct.