joeym4130
15+ Year Contributor
- 296
- 2
- Dec 8, 2003
-
philly,
Pennsylvania
This will probably be long, but please read it, i have no idea what i should do with my car anymore...i've tried so much....if anyone replies i thank you in advance...
I got my car about 2 months ago, and originally it idled high right before i bought it. so the guy wanted to try and get it right before he sold it to me, so he put a different ISC from a friend in and thats how i got it. Everything about the car was great except idle, it pulls hard, etc.
After i drove it home it had idle surge and thats when i joined this msg board. Everyone yelled, ISC ISC! So i tested it and sure enough it was bad. So i got a new ISC and put that in and it still surged like 1000-1500. Stumped, but i had to go to college, so i drove it up there since it ran good otherwise. Before leaving i did plugs, and wires look new and have no cracks..
I heard a hacked MAF can be bad, so i got a stock one. No change. Someone mentioned TPS, so i changed that too. Nothing. Then finally i got another ECU used from a guy on the trader for like $80. Thats when things changed.
The day I swapped ECUs.... I put the new one in and started the motor anxiously. The car then idled HIGH! Like 2000RPM and up depending on the weather. So i said to myself, id rather have a low idle surge then constant high! So i went to put the old ECU back in and then it was still high again!! Like it all decided to idle high once i removed the stock ECU. I thought maybe i just had 2 shitted ECUs on my hand, but the car still ran fine otherwise.
So since it idled high I decided to do the FIAV block to see if my pellet was messed up. So I found an extra TB from my friend to do the blockoff on. I made a gasket from a coke can. This TB is whats on the car now. Now when i start it, instead of idling high it idles around 1000, but super rough and sputters and dies sometimes, and smells really rich. I figured its because the weather is still chilly and i blocked that fast idle valve. So i drove it for a while to let it warm up. When i came to a stop, it was idling again at 1900, sometimes dying to 900 and sputtering sounding like dying, and then coming back to 1900.. If i use the BISS to try and idle it down, it will then sputter at the low RPM and stall.
So now, pretty much every low RPM (below 1000) the car sputters and wants to stall. I would almost be positive its a vac leak, but i hooked up a IC tester to my pipes (the UICP i took off the intercooler and put it on the end of that) and it held pressure good, my boost gauge went down really slowly like i believe it should. Im gonna test it at the turbo inlet tonight, but i doubt leaks cause i boost excellent. I have no idea what else it could be. I swear i can hear a hissing sound around the intake area, but since it doesnt leak during the test i figured it was air rushing through my hard pipes.
One more thing, i noticed a hair crack on my exh manifold about 1.25" long, which when i start engine cold, looks like it gets moist around it then evaporates. Could a tiny hair leak in the exh manifold cause all these problems?? itd be embarrasing but also a relief hah.
I am thinking of selling the car just beacause i dont know where to head from here, ive tried everything i can think of. Thanks for reading guys..im so depressed and tired of playing the game with this car..i just need some direction
I got my car about 2 months ago, and originally it idled high right before i bought it. so the guy wanted to try and get it right before he sold it to me, so he put a different ISC from a friend in and thats how i got it. Everything about the car was great except idle, it pulls hard, etc.
After i drove it home it had idle surge and thats when i joined this msg board. Everyone yelled, ISC ISC! So i tested it and sure enough it was bad. So i got a new ISC and put that in and it still surged like 1000-1500. Stumped, but i had to go to college, so i drove it up there since it ran good otherwise. Before leaving i did plugs, and wires look new and have no cracks..
I heard a hacked MAF can be bad, so i got a stock one. No change. Someone mentioned TPS, so i changed that too. Nothing. Then finally i got another ECU used from a guy on the trader for like $80. Thats when things changed.
The day I swapped ECUs.... I put the new one in and started the motor anxiously. The car then idled HIGH! Like 2000RPM and up depending on the weather. So i said to myself, id rather have a low idle surge then constant high! So i went to put the old ECU back in and then it was still high again!! Like it all decided to idle high once i removed the stock ECU. I thought maybe i just had 2 shitted ECUs on my hand, but the car still ran fine otherwise.
So since it idled high I decided to do the FIAV block to see if my pellet was messed up. So I found an extra TB from my friend to do the blockoff on. I made a gasket from a coke can. This TB is whats on the car now. Now when i start it, instead of idling high it idles around 1000, but super rough and sputters and dies sometimes, and smells really rich. I figured its because the weather is still chilly and i blocked that fast idle valve. So i drove it for a while to let it warm up. When i came to a stop, it was idling again at 1900, sometimes dying to 900 and sputtering sounding like dying, and then coming back to 1900.. If i use the BISS to try and idle it down, it will then sputter at the low RPM and stall.
So now, pretty much every low RPM (below 1000) the car sputters and wants to stall. I would almost be positive its a vac leak, but i hooked up a IC tester to my pipes (the UICP i took off the intercooler and put it on the end of that) and it held pressure good, my boost gauge went down really slowly like i believe it should. Im gonna test it at the turbo inlet tonight, but i doubt leaks cause i boost excellent. I have no idea what else it could be. I swear i can hear a hissing sound around the intake area, but since it doesnt leak during the test i figured it was air rushing through my hard pipes.
One more thing, i noticed a hair crack on my exh manifold about 1.25" long, which when i start engine cold, looks like it gets moist around it then evaporates. Could a tiny hair leak in the exh manifold cause all these problems?? itd be embarrasing but also a relief hah.
I am thinking of selling the car just beacause i dont know where to head from here, ive tried everything i can think of. Thanks for reading guys..im so depressed and tired of playing the game with this car..i just need some direction
But this is also the second idle switch i have tried, and im getting continuity when throttle is closed, and it is properly adjusted. Maybe the ECU is bad?? Any ideas??
