I had my vortech put on while being deployed and had it tuned on uprev. I came home for leave a couple of months ago for 2 weeks and got to drive it. Everything ran great. Pulls all the way to redline no problems.

Sometimes at idle it would just die. Its starts right back up no problem. For those couple of days i was home, it had a very slight miss when u first hit the throttle from idleing. Didnt do it all the time. Didnt miss anywhere else other than at idle. While home i took off my greddy single and installed a true dual set up with test pipes. It still ran the same way, except for it was getting richer under wot. I was in the 11's under wot and now its pegged at 10. Normal driving just cruising is around 14.6-15. something or close.

After this i decided to go ahead and park it. Didnt have time to retune it till i come home at the 1st of Sept. I have my wife start it up every weekend to let it warm up. Now its developed another problem. Its idleing at 10afr and the idle goes up and down a little bit with a little tiny bit of smoke out the tail pipe. Im gonna try to include a vid that my wife took. At the end of the video she is holding the pedal down to keep it a 1rpm. I come home in 2 weeks. Im trying to see if anyone has any idea why this is happening. Could changing the exhaust mess with the tune this much? Also the check engine light in the video is new.

mods are, test pipes, hks rep, walboro 255, 600 injectors, nkg 1 step colder plugs, osirus



http://www.youtube.com/watch?v=Wg_XMLoVSRI

 

First, it's not good on a car to just start it and let it sit and idle. if you don't plan on driving it more than 20 miles every time you start it then it's more damage than good. I would put it in storage mode and leave it alone.

secondly, it sounds like the throttle body has lost calibrations. You have to do a throttle body air relearn which requires the engine to be warmed up and a bunch of other things before it will stick. It also could be a dirty throttle body. If it's producing oil through the exhaust you are getting oil back through the re-breathing system and it's sucking it down into the engine. That happens without a catch can. When that oil flies around inside the plenum it settles down into the throttle body area once the car is off and gums up everything.

I was having stalling issues whenever i pushed the clutch in. I cleaned the throttle body and plenum out, did a reset, and all was good. You probably need to invest into a catch can to help prevent this in the future.

 

junky tune.

retune and report back

 

thanks for the info. im gonna try the relearn when i get back then take it back to uprev for a retune. im getting a smaller pulley soon and gonna get them to re-adjust the small stuff for me that i cant do. any reason why i might be running rich now at idle and wot though? the weather conditions seem to be about the same.

 

I wouldn't keep running it that rich. You'll wash the cylinders and lose compression. Could be a bad FMU (or faulty control circuit)