Hi, I'd like to know what sensors the TGP has, motor related. I'm starting to get really pissed off at my hesitating problem. I've replaced my plugs twice, and replaced the wires. I just had my coild checked out today, they are fine. I'm thinking I could have a bad sensor somewhere.
Can someone list all the sensors the TGP has and part numbers for them please? I might as well start replacing those since I already do have close to 110,000 miles right now.
Tomorrow I'm going to reset the computer.
check out my site there are PN's there upper and lower....
Refresh my memory, what is the problem. Or direct me to the original thread.
Chris
Ok, I'll start with my problems from the very beginning.
Early this spring, I had my fuel filter replaced. It was very clogged from probably being the original stock filter. The filter had so much back pressure that it shot fuel out like a fountian when it was taken off, the mechanics couldn't believe it. After the filter was replaced, my fuel pump started to go haywire. It would send too much fuel to the motor flooding it, making my car stall and barely run, this happened a bunch of times. I got my fuel pump replaced with a Corvette pump, it fixed that problem and ran fine.
One day in July/August, I was driving my car down a main road to go bowling. I was stopped at a light in the turn lane. I was waiting about a minute just idling when my car started to idle a little rough. Then the car stalled, so I had to restart it. The car ran fine after that.
In August I had my sound system installed. The car ran fine for a month. Then my hesitation problems started happening. When I would press the gas pedal down, the car would heavly hesitate and loose power. It would struggle to gain any speed, and black smoke would come out of my tail pipes. I took it to the mechanic and found out I had a fouled plug after he stuck his hand into the tail pipe and noticed that the car was running rich. I had all of the plugs replaced and my car ran fine for a few weeks. Then the hesitating came back. Found out I had a bad plug wire which fouled my plug again. A few weeks after that, My friend was following me in his car. I went to pass him and my car hesitated again losing power, putting out black smoke. I then had the fuel injectors cleaned out, thinking it could be a clogged injector.
A few weeks later I entered the freeway. The car hesitated again, but this time it jerked back and forth three times, and hard. It was like the car slammed into park or something. The car ran rough about a mile down the freeway with me trying to gain speed. I slowly started to gain speed as the motor started to clear out and stopped hesitating. It then ran fine after I cleared the motor out a few more miles down the road.
I had my plugs replaced again and this time had my wires replaced with Taylor 8mm wires. The car ran fine for another week. Then the hesitating problem returned. My car hesitated when I left the bowling alley [it ran fine before], then it stalled when I pulled into a parking lot. I thought it was just stuff left in the tank from the injectors being cleaned out, since the mechanic put stuff into the tank. I tried to run the tank as low as possible trying to get rid of what ever was left in the tank, I did this for about 3 tanks worth of gas.
Then I went to thinking it could be my alternator or coils. I had my alternator checked at Autozone, and it was fine. It ran fine when I went to Autozone, when I left I was at a light. The car started to run a little rough again. The light turned green and I left, but barely. The car lost power and hesitated making black smoke again. I had to pegleg it into the turnlane and turned my flashers on. The car then stalled again.
Then next day, it ran fine.
On Thursday, I was driving the car and was stuck at a light. The car started to idle a little rough, and my oil guage started to fluxuate between 40-60. About a minute later, the car didn't idle rough anymore, it was like the car turned off or something. And the "service engine soon" light came on. About a mile down the road after driving, the light went off.
I just had my coils checked out by a mechanic on Friday. They are fine.
If my car isn't a fucking love/hate relationship, I don't know what is. I'm about to say fuck it all and have my entire damn motor rebuilt this winter and have all of the electrical items replaced, because I'm seriously starting to hate my car. :evil:
Quote from: 90TGPOk, I'll start with my problems from the very beginning.
Early this spring, I had my fuel filter replaced. It was very clogged from probably being the original stock filter. The filter had so much back pressure that it shot fuel out like a fountian when it was taken off, the mechanics couldn't believe it. After the filter was replaced, my fuel pump started to go haywire. It would send too much fuel to the motor flooding it, making my car stall and barely run, this happened a bunch of times. I got my fuel pump replaced with a Corvette pump, it fixed that problem and ran fine.
The fuel filter problem sounds fair enough. In fact I think I remember this discussion. However, the fuel pump flooding the engine makes no sense. The fuel pressure regulator will keep the pressure at the right level regardless of what the pump is doing, unless the pump isn't producing ENOUGH volume/pressure. There is no way for the pump to overpower the fuel system (unless you get REALLY radical). I don't know the rating on the stock pump, but even going to a 255lph pump wouldn't cause your flooding problem. Why the pump fixed it is beyond me. Could be coincidence.
As for the rest of the problems, the plug fouling, and bad wires, sounds like a matter of circumstance covering a real problem. The only two ways for the engine to flood because of the fuel system is a bad fuel pressure regulator or bad/leaky/sticking injectors. Based on your rough idle, stalling, black smoke problems, I would say that you should invest in some new injectors. But check the fuel pressure regulator first. Remove the hose that goes to the top of it and turn the key on. When the fuel pump primes, if fuel squirts out this is your problem. If not, check your fuel pressure with a guage (vacuum hose still disconnected, but plug the hose so it doesn't cause a vacuum leak). I forget the exact spec, but it should be around 40psi. If it is too high or too low, this can also cause your problems. Incidentally, running rich because of a bad FPR or injectors can cause fouling problems with the plugs among other things, making it seem like the ignition is the problem.
I did an experiment on a TGP with the injectors. There were some running problems it was having. Black smoke under boost, at startup, slow to start sometimes when cold, sometimes when hot, gassy smells, bucking, o2 sensor setting codes, and MAJOR BOG off the line at the strip. I replaced all the injectors with new GM ones. The problems went away and the car ran better than ever. So I thought, why not just have the old ones cleaned and flow checked. So I had them cleaned and flowed. They checked out fine on the bench. I put them in the car and all the problems came back. So, since I had 3 sets of injectors 2 old and 1 new, I put another old set in, and sent the used set and the new set out to be flowed and check against each other. Again, they all flowed and checked fine. But once I put the NEW ones back in the car it ran perfectly again.
Lesson learned, the injectors can cause problems that will make you look to other malfunctions (like sensors, or ignition problems) even if they check out 100%. So if you don't know the history of the injectors, its likely that they may be your problem, if all the other systems check out fine.
I don't know if I have suggested this before, or if it has been suggested to you, but it really sounds like it may be the situation. The injectors are probably worn so that the flow pattern is not consistent at certain operating parameters, or heat, cold, fuel, humidity is affecting them. If the ignition system has been checked out ok, and you are getting black smoke, its about all it could be. This is why I also recommend replacing all injectors if one is found to be bad (shorted out or otherwise) as replacing only one will cause inconsistent performance and can lead to other problems. I realize its not cheap, but i can save headaches in the long run.
In light of recommending injectors I also offer this anecdote. When trouble shooting a different problem (missing under boost), I assumed the plug wires were good since I had replaced them only a few months prior. So i pulled all the plugs and checked and reset the gap. The problem went away for a while but then came back. So i lowered the gap on the plugs and it went away, but later came back. I then decided to start at square one and not assume anything. At the gap I had last set, there should have been no trouble to fire the plugs. Well, one night, while having someone crank the engine, I noticed that one of the plug wires was arcing out to metal. I moved the wires away from any grounding sources and the problem went away. Went and bought some fairly inexpensive plug wires and the car remained fixed after that. Thing is, under load or boost shorting to ground was the easier path to follow for the spark. Remember electricity is like water, it will follow the path of least resistance.
Lesson for this time, don't assume anything. If you have a problem, start at square one and check everything that could be related, even if something was "just fixed." Sounds like you were doing a good job of checking things out on the ignition system to rule that out. So lets move to the fuel system.
Chris
Ok, I doubt it flooded the motor, but it did die a few times, begging for death. When the filter was replaced [for the second time] along with the pump, the mechanic checked the fuel pressure, I THINK it read 47psi, but I can't think that far back :oops:. I'll have my dad check out the fuel pressure tomorrow with the guage we have [our mechanic also told us to check the fuel pressure when the car hesitates, so it probably is the injectors if different people are thinking the same thing].
One night after I had my filter replaced for the first time, my car stalled and wouldn't even want to start. So my dad had to find me. He opened the hood and placed a key on a little valve type thing by the upper manifold [I'm guessing it's the fuel regulator or something] and pressed down. Lots of air came out, and then fuel did. After he did that, I was able to start my car. My dad drove it home, and he said it ran fine after that. Then I had my pump and filter replaced the following weekend.
Hmm, does your car have a turbo heatsheild installed?
If it's a woven white cloth type thing on the turbo [came with the car when I bought it] then yes.
BTW, would you know the parts number for the injectors, and know how much they cost each?
No i don't off hand. the last time I check on price they were $86 each. Jeff Middaugh was able to get a better price than me, but I'm not sure how accesible he is. I might be selling some slightly used ones (the ones I talked about in the post) soon, but am not sure right now.
Chris