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Originally Posted by Rockhousehootie
O.K. First of all thanx for the replys!!!!!
I have put the old PCM and IAC back in as well as 3 new IAC's. The new PCM was used. When diagnosing with the Snap-On scanner, as well as All Data.com, no matter what combination of old and new parts we use, the results are always a bad PCM! The problem with this diagnoses is with the original IAC, we can jiggle the the Harness for the IAC and get a 12.2 volt result and a normal idle! We can not duplicate this with 2 new IACs (7.2 volts)(all data says needs 12.2v at idle, the lower the voltage the higher the idle) and or the IAC off of my other 93 Escort. I can install the 2 new IACs on the 93, and the result is good. The 93 IAC installed on the 96 is the same as the new ones, 2500-3000 rpm's!!!!!! I guess I would be interested in how to do the "Idle Adapter"! Thanks for all of the help!!!!!
P.S. We still have volt issues.... could this be a bad PCM?
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You still have a bad pcm code. Seems that was what you had first. Then you changed the pcm with a used one and still had a bad pcm code. I think you gotta iron out the bad pcm/code first. Whether actually in the pcm..or perhaps in the wiring harness to/near it. Would a bad pcm show/cause volt issues. I don't actually know. I would say probably.
As I have posted before a few times..I listen to this pretty fantastic car show!!!!
Last week..if you can believe this..a guy calls in..gets/has problems..lol..pcm code. Changes the pcm..pcm code comes back. The host says SURE. I have seen this. HUNH??..On that model.. ( I can't remember)..they get water leaks..and guess right where they leak??
Idle speed. Get another identical t.body from the bone. The idle speed screw is there..threaded into it(t.body)..adjustable..ONLY FROM THE FACTORY!!..(my 93 was anyway)original t.body. Use the bone t.body. The screw is factory adjusted..and then sealed with some sort of glue. Loosen this screw from the glue..and have at it. Or..if you can't break the glue bond..break it off and re-drill and re-tap. On mine the idle was too low so I just made an angle bracket that bolted to the t.body(I just pulled one of the bolts out..and bolted my bracket right there. ). Drilled,tapped it so the new idle screw could contact the t.body right near the old idle speed screw.
Why was my idle so low? I dunno..probably.. a bad injector. I never actually did a cyl bal test to find if it was one particular cyl. I checked and quadruple checked everything else about fifty times lol.Figured the new idle bracket was cheaper and much quicker/easier than pulling the rail and an injector. lol..I never ever thought it would pass emmissions.
Get a bone t.body to play with.
First fix the pcm code.