3.1LUMITIC Posted February 25, 2005 Report Posted February 25, 2005 well i know this has been posted a 1,000,000 times and ive used the search tryed everything and some of the other members cars are doing the same as mine but i have differnt symptoms ok here goes the list of what going on with it. running very rich,oil pressure isnt evan going past 20 psi on the gauge, rpms wont go above 4k even in neutral or gear, dies at almost every stop light/sign , back firing bad ,when i come to a stop light/sign the car bucks up and down the rpms , studders off the line, dont want to switch out of any gear if i have it wot , if i wot it and its above 1 gears speed 35 it will still drop into 1 redlineing it , when im at any speed cruising the rpms will drop low then buck up and down and feels like the tranny is popping in and out of gear , it used half a tank of gas in a 30 mile trip that how rich its running , if im at a red light/sign and if it dont die or buck its running a 500 rpm and my lights get very dim, thats about it things ive replace/new parts 3 new coil packs icm pvc gutted the cat collant sensor idel control valve cleaned the egr tb and upper intake replaced map sensor vacum line replace hard vacum line to the canister beside the battery new sprak plugs and wires ac delcos thats about it so if any 1 has had this problem with there car and fixed it please tell me how or if any 1 has any sudgestions please tell me . i really dont want to give her up and sell her its my first car ive ever had i would get very sad if i had to let her go i know that sounds bad but hey the first is allways hard to get rid of i guess well i guess thanks for every 1 support with my problem and reading this later -Matt Quote
Bossman429 Posted February 25, 2005 Report Posted February 25, 2005 Sounds to me like a failing alternator, along with a weak battery. When the alternator fails on these cars, the electical stuff goes bananas! The thing that tips me off to this is that you say your lights are dim as well. Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 i have a new alternator only 3 weeks old i had it checked 2 days ago every thing was fine with it and the battery is only a few months old and it checked out fine to it only dims when the rpms drop below 1k going to a stop and when i let off the gas the rpms drop way way down tot he point of stalling and then i put it in neutral and they jum back up to 2-3k at the stop light while in neutral Quote
mihela816 Posted February 25, 2005 Report Posted February 25, 2005 Sounds like the torque converter clutch is staying engaged. Also have you tried changing the o2 sensor? Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 and the check engine light is on and hasnt been on even my oil light dont come on but its running 10 psi i have went a checked that with a guage yet im going by the by the tec and another thing i wanted to know what are the main sensors that have to do with how much fuel the motor is getting and air sensors or do the computers in these thing just go out sometimes and just make it run really really rich i will start her and take some pics of the black smoke she is pumping ot thanks Quote
avitlqc Posted February 25, 2005 Report Posted February 25, 2005 my 90 grand prix 2.3 auto was doing that and i replaced the crank angles sensor ($20.00) and the TPS (about $30.00). after that it started running alot better. Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 no i havnt had the chance to change the 02 sensor yet im going to when i warms up a lil out side michigan winters suck a$$ and it fells like it is poping out of gear not staying engaged ill be going lets say 50 mph and if i give it the littlest bit of gas it wont go and the rpms drop and it just coast ago slowing down as if i put it in neutral Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 avitlqc well i was more wondering if this has happened to a 3.1 mpfi b/c your motor and mine are 2 differnt thing sry if i sound pissy and shit im just really frustarded right now Quote
topless94style Posted February 25, 2005 Report Posted February 25, 2005 Well, i would listen under the hood for a vacuum leak for starters. Then watch your coolant resevior for any air bubbles. You could have a bad intake gasket causing the poor driveablity, worsy case a head gasket. THe tranny thing does sound like a TCC solenoid. If you havent yet, get the code pulled thats causing the SES light taht would be a good place to start. You might also consider the TPS and the CPS. Quote
GP1138 Posted February 25, 2005 Report Posted February 25, 2005 After analyzing your posts for awhile, I've come to the conclusion that A) Your transmission needs attention, sorely. O2S needs replacing, possibly C) Check the TPS as well D) Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 ok what is the tps and the ses light is not coming on and yea i dont have that good of typing skills but owell i did grow up around computers a failed english classes in high school but hey thanks for pointing that out for me like i didnt allready know :| Quote
mihela816 Posted February 25, 2005 Report Posted February 25, 2005 Which tranny is it, 3 or 4 speed auto? Quote
GP1138 Posted February 25, 2005 Report Posted February 25, 2005 ok what is the tps and the ses light is not coming on and yea i dont have that good of typing skills but owell i did grow up around computers a failed english classes in high school but hey thanks for pointing that out for me like i didnt allready know :| Sorry man, I wasn't trying to be a jerk. I'm really anal retentive about that, it's not your fault. No hard feelings. Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 ok man it just been a really long bad day ever have those? Quote
avitlqc Posted February 25, 2005 Report Posted February 25, 2005 The tps is what tells the comp where the throttle is and what to adjust. i know poorly wrote but i cant think of how else to say it. It is located on the front side of the throttle body and is attached by 2 torx head bolts. In reply to your response I had a 3.1 beretta that was doing the same thing with the motor and my 90 grand prix ste turbo was doing the same black smoke thing. Quote
3.1LUMITIC Posted February 25, 2005 Author Report Posted February 25, 2005 ok well what i have read with other members cars is that this mostly happens in 3.1 mpfi Quote
avitlqc Posted February 25, 2005 Report Posted February 25, 2005 Yeah i have, today for example. My trans went out when i was about 65 miles from home. So I sympathize with you! Quote
cutlsp Posted February 25, 2005 Report Posted February 25, 2005 transmission fluid swaps can prevent transmission damage wish i had though about swaping my transmission fluid and filter on my white cutlass after i got it now when its really cold it will be slugish Quote
Turbocharged400sbc Posted February 25, 2005 Report Posted February 25, 2005 an O2 sensor that is internally (or wiring) is shorted to ground, the PCM will cause the engine to run rich, i have seen two cars with this problem (rare but it happens) also have you driven it with a manifold vacum gauge and a fuel pressure gauge hooked up and taped to the windshield? what about the PCM's short and long term fuel trim values? I'd recomend having someone ride shotgun with the scantool and watching it closely (inj PW, MAP/MAF hz etc) there may be an issue with a corroded (sensor?) ground or bad battery cables, have you checked you voltage drop across all of your grounds? Quote
loominaz34 Posted February 25, 2005 Report Posted February 25, 2005 He's just trying to be funny. I'd bet if you weren't so frustrated, you might have laughed. The TPS is the Throttle Position Sensor. I'm almost positive it's on the throttle body. (I say almost because if it's for whatever reason not, I'm not at fault) Quote
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