Mike Manzo
Registered User
Heres the scenario. They have cut the cats off and looked at them and they are both fine. They have ruled out the exhaust system since they cant see anything else other than the cats that could clog that system.
We ran the car with the fuel cut off tripped and a gas-pump hooked to it @ 37psi, but this didnt keep it running either, so we ruled out bad gasoline.
Here are the symptoms in detail.
I have been running the car with an EEC Tuner on it controlling the fan settings and some transmission settings. The car has been running cool, but in order to keep the fan from constantly running, I do have the temps set at 197 for the low speed and 200 for the high (or maybe 210, I dont remember).
The only other mods are a cold air kit and I thought that maybe I injested some water or something, but I dont think that this is the case.
While driving the car, I noticed in the past couple days that it would be mushy off the line. Much like if you were to disconnect the MAF. Off the line it would be rather bad acceleration, but after that it seemed pretty normal with the exception of some question about the gas mileage.
Yesterday, I was driving the car home and the closer I got the my house, the worse the idle got. Acceleration was bad and the car seemed to lose power. When coming to a stop, it started to really bog out on me. When I got down the street from my house, I could put the accelerator to the floor, and the car would go nowhere. Slowly accelerating and at 2000 rpms with my foot to the floor I think I reached 20mph.
I limped the car this morning to my mechanic and he disconnected the exhaust at the manifolds and he said that it seemed to run a little better, but that could have been the release of the backpressure. He didnt run the car for long, but he did limp it over to another mechanic when it got there it finally died and would not restart.
The car cranks and cranks, but wont really catch and when it does it is only a matter of time until it dies.
While on the scanner, however when the scanner is performing its tests, the car seems to run 100%. The MOMENT the scanner is disconnected, the car dies and will not start. The mechanic is pointing fingers at the computer, but I am a little leary about that personally. Just from experience with these cars, there are ghosts that mask themselves as other problems.
One thing I noticed while the car was on the scanner was the timimg. Not being able to really read it, the timing with the car turned off was reading 10. Then when running at its best (not knowing if this was the scanner doing this or not) the timing was at 30, but I was unable to monitor it further.
This scares me because I know for a fact that the harmonic was slightly wobbling and I was going to replace it with a BHJ soon, but I wanted to wait until I had some coin to drop on a real engine from Dr. Fred.
My question is could the crank sensor fail and not throw a code, but then be compensated for (somehow) by the scanner? Could the scaner take over for it?
Could the same be said about the Cam sensor?
What about the timing chain...Could that have jumped and then the scanner adjust for it?
What kind of items should I look for on the diagnostic data to see if any of these are the case. I thought that the 30 degrees of timing was a little extreme, plus I wonder if the car would run at all (with or without the scanner) if the timing chain jumped.
I have access to all the diagnostic data from that computer, so anything anyone has will be helpful.
They are ordering a computer for it tomorrow and starting from there.
ANYONE PLEASE HELP
We ran the car with the fuel cut off tripped and a gas-pump hooked to it @ 37psi, but this didnt keep it running either, so we ruled out bad gasoline.
Here are the symptoms in detail.
I have been running the car with an EEC Tuner on it controlling the fan settings and some transmission settings. The car has been running cool, but in order to keep the fan from constantly running, I do have the temps set at 197 for the low speed and 200 for the high (or maybe 210, I dont remember).
The only other mods are a cold air kit and I thought that maybe I injested some water or something, but I dont think that this is the case.
While driving the car, I noticed in the past couple days that it would be mushy off the line. Much like if you were to disconnect the MAF. Off the line it would be rather bad acceleration, but after that it seemed pretty normal with the exception of some question about the gas mileage.
Yesterday, I was driving the car home and the closer I got the my house, the worse the idle got. Acceleration was bad and the car seemed to lose power. When coming to a stop, it started to really bog out on me. When I got down the street from my house, I could put the accelerator to the floor, and the car would go nowhere. Slowly accelerating and at 2000 rpms with my foot to the floor I think I reached 20mph.
I limped the car this morning to my mechanic and he disconnected the exhaust at the manifolds and he said that it seemed to run a little better, but that could have been the release of the backpressure. He didnt run the car for long, but he did limp it over to another mechanic when it got there it finally died and would not restart.
The car cranks and cranks, but wont really catch and when it does it is only a matter of time until it dies.
While on the scanner, however when the scanner is performing its tests, the car seems to run 100%. The MOMENT the scanner is disconnected, the car dies and will not start. The mechanic is pointing fingers at the computer, but I am a little leary about that personally. Just from experience with these cars, there are ghosts that mask themselves as other problems.
One thing I noticed while the car was on the scanner was the timimg. Not being able to really read it, the timing with the car turned off was reading 10. Then when running at its best (not knowing if this was the scanner doing this or not) the timing was at 30, but I was unable to monitor it further.
This scares me because I know for a fact that the harmonic was slightly wobbling and I was going to replace it with a BHJ soon, but I wanted to wait until I had some coin to drop on a real engine from Dr. Fred.
My question is could the crank sensor fail and not throw a code, but then be compensated for (somehow) by the scanner? Could the scaner take over for it?
Could the same be said about the Cam sensor?
What about the timing chain...Could that have jumped and then the scanner adjust for it?
What kind of items should I look for on the diagnostic data to see if any of these are the case. I thought that the 30 degrees of timing was a little extreme, plus I wonder if the car would run at all (with or without the scanner) if the timing chain jumped.
I have access to all the diagnostic data from that computer, so anything anyone has will be helpful.
They are ordering a computer for it tomorrow and starting from there.
ANYONE PLEASE HELP
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