Underload issue ?

[Potomac Pat]

Just when I thought I was in the clear. I changed too many parts to list.

Including the CIS distributor & the airflow meter, just to name a few. Also I swapped the EZL, ECU, wires, plugs, coil, crank position sensor, etc, etc, etc..................

50% of the time my car runs good, but is lacking in the higher RPM ranges. The other 50% of the time is runs like crap, then all of the sudden kicks in and takes off.

The biggest problem I am having is that it only occurs under load.

If the car is in nuetral the throttle reponse & accelerator works just fine.

Any thought ?

[Benzmac]

There is an altitude compensator that I have seen fail. IT is located behind the battery...Looks like a map sensor with no vacuum line. Just electrical.

[Potomac Pat]

Thanks Donnie, I'll check that out !!

[Potomac Pat]

I located and pulled out the Altittude adjustment compensator.

My only ? is where does the signal go? To the KE control or the EZL !

[Potomac Pat]

No it's not dandruff !!!

I swapped out the altitude adjustment compensator last night.

Heres the skinny on what's going on.

The car's RPM will stay at say 4500 if I shift out @ 4500. Only with the clutch depressed for more than 10 seconds will the RPM's drop.

Here's another scenario of what is happening.

If I am sitting at a light in neutral waiting, sometimes the RPM's will slowly climb up to 3000 RPM by itself.

Any other thoughts guys?

Ignition related ? Maybe ? Due to the fact that it is not a constant problem. It is only sporadic. But when it does run seemingly ok it still lackes power !!!

Originally posted by Potomac Pat
No it's not dandruff !!!

Here's another scenario of what is happening.

If I am sitting at a light in neutral waiting, sometimes the RPM's will slowly climb up to 3000 RPM by itself.

Any other thoughts guys?

That sounds like a lean-out situation, perhaps caused by a vacuum leak. How are your manifold gaskets?

[Potomac Pat]

I just put new intake & exhaust manifold gaskets in less than 1 year ago.