midiwall

Yes. Is the code still your original PO773?

Doubtful.

It's possibly the best use of $65 that I can think of, 'specially when you're driving 4500 miles in two weeks to Baja.

elnido

Yes, still PO773, just had that solenoid replaced.

midiwall

Hmmm... okay, so it's probably a good idea to start looking at the wiring.

When you say that the truck runs better with the CEL cleared, can you expound on how it runs "bad"? You mention "shifting perfectly", so what's "imperfect?

Did you contact the guy that Jamie (MTL_4runner) found?
http://www.race-dezert.com/forum/sho...oto=nextoldest

Did you contact rudestar (bottom of page one of this thread)? Looks like he's got quite a line on ECUs on the cheap.

elnido

when the CEL is on, the tranny seems to shift "uncertainly". In other words, it shifts, then shifts back between 3rd and OD. Again, it's really subtle. I can't get it to misbehave on demand. The CEL goes on as soon as I start the truck, everytime. I read the link, different problem than mine. I think I'll try another ECM, as long as I can return it.
thanks

midiwall

Hmmm... okay, given how cheap rudestar is offering them for, the ECU sounds like a plan, though it's a bit of fun to get it out and in (it's up behind the glove box).


Past that though, let's talk a bit more about the symptoms...

Does this happen at all engine/road speeds?

You say the effect is subtle... I just tried something on the way home about this. My engine spins around 1500 RPM in OD at 30 mph. If I turn off OD, I bounce to about 1650 RPM. When this shift thing happens to you, do you see the RPMs come up?

elnido

midiwall, thanks for your help/interest in this. I'll do a couple of tests the next chance I get to give you some more feedback. When I notice the weirdness (subtle) when the CEL is on it's usually accellerating from a start, then suddenly lifting off the gas. I've been digging in the archives about AT/temp also, as I've been seeing my at/temp light lately, on long hills at about 70-75mph.

jolson

I was about to send the ecu (89661-34140) from my '95 T100 4x4 (220000 miles) to a rebuilder when I came across this thread. My mechanic (AP auto mech instructor - not looking for $$) reported a weak or intermittent signal to one O2 sensor (didn't get the code). The engine is missing - especially when cold. Wondering how to proceed. Rudestar, do you have that model ecu? Willing to part with it?

Thanks in advance.