Getting better, still can't floor it

[53heloFE]

The car is now driveable, but I still can not get more than 1/2 throttle out of it. At that much throttle it does not really accelerate, maybe a little. She will sputter a little and sometimes sounds like a small back fire. I did change the fuel filter today and that made another huge difference like disconnecting the misfire dector did, thanks LarryB. So here is what I have done up to this point:

1. Replaced spark plugs, helped a little maybe 5%

2. Ohmed out ignition coils, all good

3. Ohmed out fuel injectors, all good

4. Ohmed out fuel injector resistor, all good

5. Checked for battery voltage at the injectors, all good

6. Put ignition coils in their proper locations, didn't seem to make a difference

7. Re-soldered main relay, didn't seem to make a difference

8. Checked compression, all good

9. Disconnected misfire dectector, made about a 30% difference to the better

10. Replaced fuel filter, made another 30% difference to the better

11. Checked fuel pressure regulator, non standard method but seems fine

12. Ohmed out crank position sensor, all good

13. Put fuel injector cleaner in the tank, waiting to run it through to see if it makes a difference.

I'll post anything else I do, and what the results are. Thanks to all who have provided imputs to me.

Jason

 

[Larry Bastanza]

Next thing I would do is get a fuel pressure gauge on it.

HTH,
LarryB