supreme_style21 Posted May 20, 2006 Report Posted May 20, 2006 97 Cutlass Supreme - Before it hits its 'operating' temp, it sputters so damn bad under acceleration (and it has the WORST "3100" tick that I've ever heard.. almost sounds like it wants to throw a rod.. its downright embarassing).. and its only from a dead/rolling start. If you're at highway speed or whichever and kick it down, its sorta sluggish, but doesn't spit and sputter really. When I first got the car, it was great.. and this has slowly developed and continuously gets worse. I've replaced the plugs, wires, coils, ICM, and fuel filter. The plugs were horrible... I was suprised it still RAN. But none of the repairs has made a dent in the problem. At idle, its fine. Also, I don't know if this is relavent or not, but if you remove the oil fill cap when its running, it immediately starts surging... comes to the point to where it almost kills itself, then it levels out somewhat and idles semi-high. There is no coolant to be seen in the oil and it doesn't seem to be going through any fluids. Where the hell should I be looking??? Quote
Supreme Cutlass Posted May 20, 2006 Report Posted May 20, 2006 First off, ex-nay on removing the oil cap WHILE it's running, if you're looking for the nastyness on the oil cap, take the thing off while the engine is OFF. I'd replace the PCV valve, and air filter if you havent done so in a while. Secondly it could be the EGR valve, oxygen sensor, or perhaps a MAP sensor issue, just some things to look into, not really sure. Are you using the oil reccomended for the car? Quote
supreme_style21 Posted May 20, 2006 Author Report Posted May 20, 2006 First off, ex-nay on removing the oil cap WHILE it's running, if you're looking for the nastyness on the oil cap, take the thing off while the engine is OFF. I'd replace the PCV valve, and air filter if you havent done so in a while. Secondly it could be the EGR valve, oxygen sensor, or perhaps a MAP sensor issue, just some things to look into, not really sure. Are you using the oil reccomended for the car? I've NEVER saw that kind of surging/stalling with removing the oil cap before. On any car, I've never saw a response with removal. Removing this one almost kills the engine. The PCV valve and air filter have been changed. O2, EGR, and MAP (yay for capital letters) have not been changed. They're expensive items that I'm not (financially) willing to just throw at the car at this point in the game without some sort of direction. Quote
Supreme Cutlass Posted May 20, 2006 Report Posted May 20, 2006 First off, ex-nay on removing the oil cap WHILE it's running, if you're looking for the nastyness on the oil cap, take the thing off while the engine is OFF. I'd replace the PCV valve, and air filter if you havent done so in a while. Secondly it could be the EGR valve, oxygen sensor, or perhaps a MAP sensor issue, just some things to look into, not really sure. Are you using the oil reccomended for the car? I've NEVER saw that kind of surging/stalling with removing the oil cap before. On any car, I've never saw a response with removal. Removing this one almost kills the engine. The PCV valve and air filter have been changed. O2, EGR, and MAP (yay for capital letters) have not been changed. They're expensive items that I'm not (financially) willing to just throw at the car at this point in the game without some sort of direction. My engine goes nuts with it off, but whatever. As far as the sensors are concerned, I didn't say change them, just look into it. IE, check and make sure the EGR isn't clogged, etc. and if you can, check the signals from the sensors while it's cold to make sure they aren't giving a false reading. Quote
1990lumina Posted May 20, 2006 Report Posted May 20, 2006 Mine hesitated off the line when it was cold before....a couple bottles of injector cleaner made the problem go away dunno if it's realted or not Quote
supreme_style21 Posted May 21, 2006 Author Report Posted May 21, 2006 Mine hesitated off the line when it was cold before....a couple bottles of injector cleaner made the problem go away dunno if it's realted or not I've tried a few just for the hell of it, but its quite the severe miss, so I doubt that'll end up curing it. Quote
3pt1lumina Posted May 22, 2006 Report Posted May 22, 2006 Sounds like the upper manifold may be clogged. Mine was on my 90 3.1... took the manifold off, soaked it, cleaned it, put it back on and it's like new again..... although it's still seems like it's missing (DAMMIT). Quote
19Cutlass94 Posted May 23, 2006 Report Posted May 23, 2006 I know when my car is cold, it feels like a plug ( maybe a couple ) isnt firing and causing a lost cylinder. I duno if thats your problem or not. Quote
supreme_style21 Posted May 26, 2006 Author Report Posted May 26, 2006 I know when my car is cold, it feels like a plug ( maybe a couple ) isnt firing and causing a lost cylinder. I duno if thats your problem or not. Thats what it feels like yeah. There is no SES ( I wish it would.. give me some kind of direction) I'm hoping I don't have to tear into it. It went away for a few days, but just as I was starting to think it was gone, it came back. Quote
19Cutlass94 Posted May 26, 2006 Report Posted May 26, 2006 Pull the plugs, and check them. There was one plug that did that for atleast 1,000miles ( the plug would fire, but then it would foul out for a while and then fire ) until it finially just didnt work anymore. Plus thats probably one of the easiest things to check. Quote
supreme_style21 Posted May 26, 2006 Author Report Posted May 26, 2006 Pull the plugs, and check them. There was one plug that did that for atleast 1,000miles ( the plug would fire, but then it would foul out for a while and then fire ) until it finially just didnt work anymore. Plus thats probably one of the easiest things to check. I've already changed the plugs, wires, coils, and ICM. Quote
greekguy7 Posted May 26, 2006 Report Posted May 26, 2006 You check spark on all 6 cylinders.... perhaps you got a coil thats bad. You check fuel pressure with a gauge? Finally, you may have to check your injectors by ohm'ing them out (12.1 ohm each is the spec) Quote
supreme_style21 Posted May 26, 2006 Author Report Posted May 26, 2006 Did you check the springs/rockers? No sir You check spark on all 6 cylinders.... perhaps you got a coil thats bad. You check fuel pressure with a gauge? Finally, you may have to check your injectors by ohm'ing them out (12.1 ohm each is the spec) I've swapped coils with those out of my '95 GP, which were roughly 8k old when I totaled it. Otherwise I haven't checked fuel pressure. Does the cool/warm engine temp difference change fuel pressure? And thanks for the injector specs.. If it comes down to some free time, I will have to try that. Quote
White93z34 Posted May 27, 2006 Report Posted May 27, 2006 change the fuel filter yet? and thats REALLY odd that the engine would be affected in the least by removing the oil cap, i've done that tons of times and it hasen't made a damn difference. i'd be willling to wager that you may have a bad injector mabie more. Quote
supreme_style21 Posted May 27, 2006 Author Report Posted May 27, 2006 change the fuel filter yet? and thats REALLY odd that the engine would be affected in the least by removing the oil cap, i've done that tons of times and it hasen't made a damn difference. i'd be willling to wager that you may have a bad injector mabie more. Fuel filter, yes And yeah, the oil cap thing really caught me off guard. I had to do it a few times to make sure I wasn't hearing things, but it sure makes it erratic.. and that is what is throwing me off. WHY would it do that? Some sort of pressure issue?? I can't figure it out. Quote
19Cutlass94 Posted May 27, 2006 Report Posted May 27, 2006 possible PVC valve? or one of the lines. When you take the cap off it shouldnt make a difference at all. Check the tubes to make sure there not filled with anything, and the PCV valve Quote
White93z34 Posted May 27, 2006 Report Posted May 27, 2006 how about the O2 sensor? i'm just guessing at this poiint though. Quote
supreme_style21 Posted May 27, 2006 Author Report Posted May 27, 2006 Again, the PCV valve has been changed. There are a lot of things I think I'll end up throwing at it. Quote
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