Well some of you may have read my posts on my engine problem. The car just flops on it's face between 1500 and 2000 RPM's and after that it's fine. The sensors are all new and the new chip should be good because I put the old one back in and it still has the same problem. I have also checked already for vac leaks and found none.

Could it be my pickup coil?? I'm changing it as we speak, but I figured I would get some reassurance from you guys.

 

Anything is possible, but reluctors and pickups seem to be more temperature sensitive than RPM sensitive.

Where is fuel pressure?

Is the IAC clean? Minimum air set correctly?

Are you using a stock coil?

You may have to break down and replace the O² sensor if it isn't fairly new. You might also need to check for detonation counts and spark retard (bypass EST for testing purposes).

 

Vader,
Fuel Pressure is around 49-50, the O2 sensor is new, but maybe it's bad?? The IAC is new and I have a new MSD coil. I just finished replacing the pickup so I'll take if for a spin after I shower.

 

Paul, have you tried backing the FP off? 49/50 seems rather high. I forget what set up you are running. Perhaps it is too much fuel for the RPM range (the prom programming could not be able to handle that much fuel).

 

Well I slammed the distributer back in and went for a drive and surprise, surprise.....it still didn't fix the problem!!!!

Let me recap everything here and maybe someone can offer some other solutions.
The engine specs are in the signature so you can gather info there.
Here is my list of engine related problems. They may be related or unrelated....not sure yet: The idle is very erratic..it will bounce around in about a 200-400 RPM swing. After driving a while it stalls at idle when I come to a stop and I have no idea why. Also I have a problem with heat-soak in the starter now that I never had before and the engine isn't running hot at all....temp is like 160-170 only.
Also there is a NASTY power loss between 1500-2000 RPM's that I can't track down. It happens in any gear, cold or hot, and pretty much all the time, not intermittent.
Finally, I threw a code 13 the other day for about 30 seconds. That's the code for a lean O2 reading at warm cruise.

Now here is what I've done already. I've checked for vac leaks and found none, plugged my old computer chip back in and still had all the same problems (except the code which hasn't come back since the first time), replaced the TPS which was good anyway, replaced the pick-up coil tonight, all other sensors are new, tried checking all my grounds (although if it was that I think the problem would be more intermittent), coil is a new MSD, wires and plugs are new, cap and rotor only a year old.

Here are the only other thoughts I have left: Bad ignition module (but I think that it would give me trouble at other RPM's too), maybe the IAC or O2 sensor is no good (the car passed inspection with very low emissions last week), somethings up with my torque converter (wouldn't I see a change in RPM's when I hit the dead spot if that was it??), other than that I am absolutely stumped!!