I got a GSR motor with s2 stage 2 w/ CTR piston. Pro-fab header and SP exhaust. My intake mani is stock and so is my injectors and fuel pump. Ever since i got the pro-fab header and even after tuning the car. My car been falling out of idle even stalling out on me. I think it's my fuel pump giving out on me or my injectors are too small. But i wanted to check with you guys to see is my assumtion is right. Thx guys..

 

did the injectors sit up for awhile?

 

First things first- remember to clean out your IACV (Idle Air Control Valve). Common cause of idle problems there. There are a million how-to's online and it only takes a few minutes to do. Also, try changing your fuel filter...that's a very often overlooked component and it's only a few dollars. After all, it certainly can't hurt. It's unlikely that the installation of headers would cause such idle problems. Granted, backpressure is reduced and enough of an airflow increase can lean the car out some, but it should still idle fine. It's my opinion that the factory fuel pump can usually use an upgrade at the mileage most of our cars are at anyways and serious modifications certainly don't make life any easier on the factory fuel system. What did you have done when the car was "tuned"? Have you attempted to adjust the TPS (throttle position sensor)? Does the car idle on its own at all? As the previous poster suggests, dirty injectors may also be to blame.

~ Masta' C ~

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ijustwntit &raquo;</TD></TR><TR><TD CLASS="quote">First things first- remember to clean out your IACV (Idle Air Control Valve). Common cause of idle problems there. There are a million how-to's online and it only takes a few minutes to do. Also, try changing your fuel filter...that's a very often overlooked component and it's only a few dollars. After all, it certainly can't hurt. It's unlikely that the installation of headers would cause such idle problems. Granted, backpressure is reduced and enough of an airflow increase can lean the car out some, but it should still idle fine. It's my opinion that the factory fuel pump can usually use an upgrade at the mileage most of our cars are at anyways and serious modifications certainly don't make life any easier on the factory fuel system. What did you have done when the car was "tuned"? Have you attempted to adjust the TPS (throttle position sensor)? Does the car idle on its own at all? As the previous poster suggests, dirty injectors may also be to blame.

~ Masta' C ~</TD></TR></TABLE>

Well, my car was tuned on the set up it's on now and i haven't changed it since. Tuned by Modacar so im pretty sure it's not the tuning. I will most definately change my fuel filter and take a look at the IACV. I would appreciate it if you gave me some links but i'll try to find it myself first. I've also mess with the throttle cable but that didn't help at all cause it still fell out of idle. My car pulls a code when i drive it semi cold, and i think the code is 43 which should be something about fuel supply system. I dont think it's dirty injector's cause i use Chevron injector cleaner when needed...What's funny is that i clearly remember that when i switch from the ITR header to Pro-fab header that's when i started to have that problem. I drove around for like two weeks untuned and when i went to go retuned for the header, it didn't fix it.


Modified by aznstyler119 at 11:25 AM 6/30/2006

 

Welp today i finish doing those projects. I clean out the IACV and replaced the fuel filter. I'm still having that problem but it's a little better. My IACV was very dirty. Anywayz, any other idea of what else is happening to my car. Plz put in any advice...