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89 high idle problems, surging, help!

dyeager535 said:
'Cause you know more than I do on how that code would be triggered!
Click to expand...
Code: 
     ;---------------------------------------------
     ; error 22 param's
     ; Low TPS
     ;---------------------------------------------
LD523   FCB  10     ; TPS limit, 0.20 VCD
LD524   FCB  48     ; DEFAULT TPS, 0.96 VDC
Somehow TPS voltage is going below 0.20 volts.

I was also wrong in this thread or another where I said it did not matter what TPS voltage was if it were below 1.xx... it is 0.96 as shown above.

black dawg said:
just a fluke, unless the grounds were disturbed somehow. Any welding?

Have you taken a look at the grounds on the motor? I have seen some that the wire itself was broken down a half inch from the eye.
Click to expand...
Grounds and welding could be an issue!
 
Welded new mufflers in. Nothing else done. I have run the truck and dogged it a couple times to see if a fluke. Messed with heater fan, lights, anything electrical that might trigger. No additional fix at motor. Sounds like a ground was reestablished somehow? Prob act up again. Continue tracing wires or let live until it starts again???
 
I'd let it live, and cringe every time I drove it, expecting it to pop back up. :)

But seriously, if it's not throwing any codes, and it seems to be running right, there is little point in trying to fix things, pretty unlikely you'll know if you fixed it or not, unless it was blatantly obvious. But if it was blatantly obvious, the problem wouldn't have gone away on it's own.

Well, unless your check engine light bulb died. lol
 
yep, I understand however, the relief felt right now, although maybe only for a day or two, might give me the patience to deal with it again next time instead of yanking the entire motor and starting over and burying myself in costs,,.. lol

Thanks for the help, I am betting I will be back on here within the week checking ground wires...........but I certainly hope not. thanks again
 
okay, back at it again. problems resurfaced. High idle all over again. Thought I found the culprit with a broken thermostat sensor, replaced and runs well for a day, occasional high idle, check engine light on and off. Traced ground wires to engine and body, cleaned all connections.............. no go on a fix. Noticed truck runs well when check engine light is NOT on, then when it comes back on, transmission seems to slip ever so slightly changing gears but ONLY when check engine light is on. Doesn't skip a beat if the check engine light is NOT on.

okay, went back and checked all grounds and everything looks grounded EXCEPT there is a black wire with a clip hanging loosely which appears to be supposed to be connected to the alternator??? But it is a slide on connector and I simply cannot find anyplace this wire my have come loose. Also, the alternator was (looked like) missing a bolt for the bracket so I connected the bracket back to the alternator. Now the engine is pouring so much gas and stalling out I can't even drive it. What in the world??? Anyone have any suggestions, I am all ears!
 
Here are photos for anyone to look at that might can tell me if something is wrong. click on this link:

http://snack.to/phc9suhx

I also have a video showing the surge when the air filter is off I can post sometime if that helps. Any and all help is greatly appreciated. thanks
 
You either need to get/make an ALDL cable and a program like Tunerpro RT (free), or you need to get your hands on an OBD1 Scantool like an Autoxray XP240 that shows you what is going on with the motor at all times.

Datalogging means what the ECM is doing/seeing is recorded into an electronic file (like excel spreadsheet) while the engine is running, which can then be viewed/posted online so that people can take a look at what is going on. It will show things like what trouble code is being triggered, what temperature the ECM thinks the engine is running at, if O2 sensor is working, etc. It is far better than a scanner because you can concentrate on driving instead of monitoring the data. Some of the higher end scantools probably record, but an ALDL cable is $60 at most probably, most people have a laptop already, and Tunerpro RT is free. Plus you can easily share the data with people online.

Pretty much invaluable on the fuel injection setups.
 
so, now that the light has come back on, what code # is it throwing now?

idle speed issues tend to be IAC related.. but you never gave that code the first time around...
 
Code 22 eliminated. Was bad wiring harness on the TPS. Still working on the 44 but the high idling problem is FIXED! thanks for all the help!
 
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