Tech 4 problems

[Matt Beaubien]

Well, with everyone spewing forth Iron Duke / Tech 4 information, I thought
I'd try to get a copule of answers for myself.

I have an '86 Olds Ciera that used for hauling my Civic around to races and
for driving around when my daily driver is down (like right now -- changing
a heater core on a 300ZXT, ugh).

Anyways, I'm going to be selling it this summer and would like to get it
running a bit better. It has 180k miles on it (used engine install at 140k
miles after a rod knock) and it's never really run well after the guy
installed it.

The problem is as follows. Response and power is very poor. It's like the
engine is very lean or the timing very retarded. Especially when cold, shift
recovery is very poor and it seems to drive like it has a weak accelerator
pump (if it was carbed). 

However, once warmed up, at certain speeds, the engine power will suddenly
pickup as if a misfiring cylinder came back to life. It is not misfiring
when this happens though. I don't have a tach but it seems to be RPM
related. It happens at ~25 MPH in first, ~40 MPH in second, and ~60 MPH in
third, and is quite repeatable. 

I've tried swapping the TPS and MAP with no difference. The plugs don't look
too bad either.

Any suggestions?

Thanks in advance.

Matt Beaubien
mbeaubie at gpu.srv.ualberta.ca
3 x 510
1 x Civic 1200
1 x 300ZXT