OK, that annoying idling problem on my '88 Formula is fixed -- for now.
It was a bad ICM -- even though I replaced it.

When the car got hot, the idle would start to wander and then the engine would die.

I replaced the iCM today and that fixed the stalling.

But now I have a 22 code (low TPS sensor voltage) and there is a slight hesitation on tip-in.

I messed with the idle screw in my attempts to correct the stalling issue. But I have reset it to minimum air.

The TPS is also new.

The car seems to be running fine except for the SES light triggered by the TPS voltage situation.

Question: What causes a low voltage at the TPS? The MAP is new and working properly.

Thanks,
Rich Truett

No +5 on the Gray wire at the TPS.

Not having a good wire between Pin B (Dk. Blue) of the TPS and the ECM

Thanks, I will check those connections...

I had a bad "new" TPS last year.

I bought a BWD (Borg-Warner) ICM today and the car wouldn't even start.
I went back and got the less expensive one and it runs fine. But who knows how long it will last.

The parts quality we are getting these days is junk. NOS is best.

I guess.

The bad tps I got was also a bwd

quote Originally posted by Rich Truett: I bought a BWD (Borg-Warner) ICM today and the car wouldn't even start. I went back and got the less expensive one and it runs fine. But who knows how long it will last. The parts quality we are getting these days is junk. NOS is best. I guess.

Just a FYI.....BWD is a brand of Standard Motor Products. It has no connection to Borg Warner. And YES....a lot of ICMs are junk before you put them on a car. The real difficulty with a bad ICM is that it fails in many different ways, so it is hard to trouble-shoot. Delcos seem to be marginally better, but most of us ride around with an extra one in the trunk.

Rich, I've been following your idle fix thread and other issues regarding your 88 Formula.

Again, I will say this...if you want piece of mind, replace your parts with only AC Delco.

Yes, if NOS is available buy it. You are correct on that one

Buying parts at low cost will haunt you. You pay nothing, you get nothing.
There should be no reason even for aftermarket should fail out of the box. But it will most
likely fail later. Today people have to learn that buying Chinese autoparts is a no-no.
I try seriously not to support the companies that have parts made in china. I support north
America where our native cars are built from.

Please update us on your findings.

------------------
fierogt28

88 GT, Loaded, 5-speed.
88 GT, 5-speed. Beechwood interior, All original.

quote Originally posted by fierogt28: Rich, I've been following your idle fix thread and other issues regarding your 88 Formula. Again, I will say this...if you want piece of mind, replace your parts with only AC Delco. Yes, if NOS is available buy it. You are correct on that one Buying parts at low cost will haunt you. You pay nothing, you get nothing. There should be no reason even for aftermarket should fail out of the box. But it will most likely fail later. Today people have to learn that buying Chinese autoparts is a no-no. I try seriously not to support the companies that have parts made in china. I support north America where our native cars are built from. Please update us on your findings.

Everything Ive replaced thus far in my restore has been with bosche, ac delco and k&n. I definitely recommend those brands