Buck531 Posted October 14, 2009 Report Share Posted October 14, 2009 I thought I figured it out with replacing the FPR, but that didn't seem to fix it all. When it's cold (only when cold - sitting for hours) the car will start, but die almost instantly. If you give it gas for about a minute, it's fine for the rest of the time. Then when it warms up, it starts normal and everything is fine. I hooked up my scanner and there are no vac leaks, all sensors seem to be fine, no codes being thrown. Unplugged the maf and does the same thing. I checked the front 3 plugs and they seem to be ok. I might just change them tomorrow anyways. Plug wires look new and the coil packs are fine. Got anything else I can try? 02 GPGT btw. Quote Link to comment Share on other sites More sharing options...
Guest tbutera2112 Posted October 14, 2009 Report Share Posted October 14, 2009 had an issue like this on my mustang, not sure about your car... mine was the Idle Air Control valve...cleaned it out with brake cleaner and it ran like a charm Quote Link to comment Share on other sites More sharing options...
SRTurbo04 Posted October 14, 2009 Report Share Posted October 14, 2009 ive got this same problem on my 97 expedition with teh 5.4... it only happens on cold days when it sits over night. not sure what the issues is... kinda of annoying but was fine once u kept ur foot on the gas for about 30 seconds an was perfect when it warmed up :edit: this only happens in the cold never does it during the summer months Quote Link to comment Share on other sites More sharing options...
DTM Brian Posted October 14, 2009 Report Share Posted October 14, 2009 How about making your cold start fuel a little richer on start up. I thought I figured it out with replacing the FPR, but that didn't seem to fix it all. When it's cold (only when cold - sitting for hours) the car will start, but die almost instantly. If you give it gas for about a minute, it's fine for the rest of the time. Then when it warms up, it starts normal and everything is fine. I hooked up my scanner and there are no vac leaks, all sensors seem to be fine, no codes being thrown. Unplugged the maf and does the same thing. I checked the front 3 plugs and they seem to be ok. I might just change them tomorrow anyways. Plug wires look new and the coil packs are fine. Got anything else I can try? 02 GPGT btw. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted October 14, 2009 Report Share Posted October 14, 2009 clean the iac and TB Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted October 14, 2009 Report Share Posted October 14, 2009 ya I would say check the tb and clean it... also does it do it when it is cold outside or just when the car is cold??? cause you have checked the maf and the plugs and it wouldnt be the crankshaft posistion sensor wich is the other one known to go bad.. it is a long shot but you might ahve a clogged or dirty injector and it takes a minute for it to push the stuff out but then after the car sits it builds up in the injector again.. other than that I am fresh out of ideas lol Quote Link to comment Share on other sites More sharing options...
3.1cutlass Posted October 14, 2009 Report Share Posted October 14, 2009 Do those have a crank position sensor? Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 14, 2009 Author Report Share Posted October 14, 2009 ya I would say check the tb and clean it... also does it do it when it is cold outside or just when the car is cold??? It does it when the car sits for more than say 4 hours. (motor is cold). I don't think weather has much to do with it. I'll take off the TB and clean all the junk tomorrow. Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 14, 2009 Author Report Share Posted October 14, 2009 Do those have a crank position sensor? yes, but when they go bad it'll start throwing codes. Quote Link to comment Share on other sites More sharing options...
3.1cutlass Posted October 14, 2009 Report Share Posted October 14, 2009 yes, but when they go bad it'll start throwing codes. Thats true. I would go with what they said. It could maybe be a fuel filter? Quote Link to comment Share on other sites More sharing options...
nurkvinny Posted October 14, 2009 Report Share Posted October 14, 2009 Welcome to my world last year. Also an 02 GT. http://www.columbusracing.com/forums/showthread.php?t=58275&highlight=pressure http://www.columbusracing.com/forums/showthread.php?t=58744&highlight=pressure STILL does exactly as you describe. Quote Link to comment Share on other sites More sharing options...
STEVE-O Posted October 14, 2009 Report Share Posted October 14, 2009 well you can always pay to have a dealer look at it and tell you what is wrong but that is if you want to spend out the rear on it... ??? check on goclubgp if anyone has had similar problems and knows Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 14, 2009 Author Report Share Posted October 14, 2009 check on goclubgp if anyone has had similar problems and knows no thanks. Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 14, 2009 Author Report Share Posted October 14, 2009 Welcome to my world last year. Also an 02 GT. http://www.columbusracing.com/forums/showthread.php?t=58275&highlight=pressure http://www.columbusracing.com/forums/showthread.php?t=58744&highlight=pressure STILL does exactly as you describe. I read both threads. Yours would do it when the motor is cold or hot. Mine ONLY does it when the motor is cold. After it gets up to temp, everything is perfect and fine. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted October 14, 2009 Report Share Posted October 14, 2009 grime build up in the iac passages cause's this. like i said, clean the TB and iac real good and try again after driving it and clearing the intake track out Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 14, 2009 Author Report Share Posted October 14, 2009 grime build up in the iac passages cause's this. like i said, clean the TB and iac real good and try again after driving it and clearing the intake track out Will do. I did pop off the IAC a few hours ago and wiped it down as I didn't have any brake cleaner in the garage. It was pretty caked with stuff. Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted October 14, 2009 Report Share Posted October 14, 2009 Will do. I did pop off the IAC a few hours ago and wiped it down as I didn't have any brake cleaner in the garage. It was pretty caked with stuff. that will do it...make sure you clean the TB passages and throttle blade area real good.. i have some product here that will clean that shit right up instead of wasting brake clean on it. plus brake clean leaves a film behind that attracts more grime... just saying Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 14, 2009 Author Report Share Posted October 14, 2009 that will do it...make sure you clean the TB passages and throttle blade area real good.. i have some product here that will clean that shit right up instead of wasting brake clean on it. plus brake clean leaves a film behind that attracts more grime... just saying Yeah. I normally use electrical parts cleaner when I'm cleaning the maf and such. Hell. I think that did it. I just started it up after sitting a good 2 hours in the garage and the motor was nice and cold. Fired right up and stayed running. The big test will be tomorrow morning. Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 15, 2009 Author Report Share Posted October 15, 2009 Ok here's another update. Pulled the TB and cleaned the shit out of it. From the leaking FPR, it was soaked in gas. Threw it back together. Still does the same fucking thing. Changed the plugs. Wires/coils are fine. Now it starts, but you have to just blip the gas once right as you crank it and it's fine and doesn't die out. When the car comes up to temp, it starts fine every time. One thing left I guess is the fuel filter. But why would it only do it when cold? Quote Link to comment Share on other sites More sharing options...
Guest tbutera2112 Posted October 15, 2009 Report Share Posted October 15, 2009 you say you cleaned the TB, but did you also clean the IAC? Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 16, 2009 Author Report Share Posted October 16, 2009 you say you cleaned the TB, but did you also clean the IAC? yes.. I took out all the sensors and sprayed them liberally with electrical cleaner. Quote Link to comment Share on other sites More sharing options...
SicShelby Posted October 16, 2009 Report Share Posted October 16, 2009 Could this be related to something like the electronic choke? Quote Link to comment Share on other sites More sharing options...
Drew2o2 Posted October 16, 2009 Report Share Posted October 16, 2009 if its hard to start when cold perhaps consider testing the ect sensor, kinda a long shot but is a possibility if you have exhaust everything else Quote Link to comment Share on other sites More sharing options...
Guest Removed Posted October 16, 2009 Report Share Posted October 16, 2009 whats your iat reading when cold? Quote Link to comment Share on other sites More sharing options...
Buck531 Posted October 17, 2009 Author Report Share Posted October 17, 2009 whats your iat reading when cold? After it warms up a tad? or right from the start? It's going to read high from the start only because I have to keep the foot on the pedal. Should I try to replace the fuel filter? It almost seems that when it starts to die, it trys to "catch" itself and it ties but doesn't work. Quote Link to comment Share on other sites More sharing options...
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