The car will start = gets fuel, revs up but won't go
was able to drive for a while after
Injectors were redone
coils have been replaced
plugs have been changed - firing order checked
sensors have been replaced - codes keep changing on computer - at times check engine/service light comes on but currently neither is coming on
fuel pump is working - filter has been changed
any other ideas?
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random misfire can be due to bad sparkplug wires or a vacuum leak at the intake, there are many thing that can cause a random misfire even low fuel pressure, and last would be dirty injectors. i would start by having the fuel pressure checked and then having the injectors cleaned.
If it will start, you can drive it. Some computers will not fire the injectors without a signal from the cam sensor, but many will default to data from the crankshaft sensor when the cam sensor fails. This may result in reduced fuel mileage, but will not hurt the car. Basically, the injectors are spraying at a less optimal moment. OK?
Your fuel pump might be going bad. The reason why it cuts off is the fuel pump is pumping just enough to run it for a x amount of time that's why it shuts off but while it's off the pump is pumping fuel into the lines. If it's not the fuel pump then it might be your injectors.
I have a 1996 Lesabre. I had a similar problem that slowly got worse. I brought it to two different mechanics that did diagnostic checks and could only "suggest" what to replace to fix the problem. Their problem was that it wouldnt stall out while they had the mv. After replacing a bunch of sensors and the fuel pump/ filter, I solved the problem by replacing the Crank Sensor. Its located behind the lower crank pulley on the 3.8 lt motor. Hope this helps!