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electrical problem?

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Old Oct 4, 2004 | 08:59 PM
  #1  
89IROCZTPI's Avatar
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From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
electrical problem?

I have my problem posted in the general tech forum, but I think I might be having more of an electrical problem, so here goes. When I start my car for the first time during the day/morning/whenever, it starts right up and then stalls out, after 5 or 6 times starting it up and it stalling out, it will start to idle real rough for a minute or 2, then it will idle up and down, roughly from 1k to 1.5k RPMs, on occassion it will rev itself up over 1500 RPMs by itself, as if I was holding down the gas. This is the problem thus far, I dont know if the idle and the stalling are seperate problems or not. I unplugged the MAF the other day and the car started right up, but I know the MAF and both relays are good, please help!

And a list of what ive replaced so far:
Spark plugs/wires, Dist cap/rotor button, O rings on the injectors, gasket on the manifold, fuel pressure regulator diaphram, Fuel Filter, O2 sensor, both temperature sensors/sending units, MAF and both relays, and a variety of vacuum lines. Sorry for the long post.
Thanks!
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Old Oct 5, 2004 | 05:33 AM
  #2  
Danno's Avatar
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From: Warrington, PA USA
Car: "02 z-28
Engine: LS-1
Transmission: 4L60E
Remove the throttle body and remove the IAC assy. Throughly clean the TB and passages and the throttle plates. I would also replace the IAC. I had a similiar problem a while back and that did the trick.
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Old Oct 5, 2004 | 09:15 AM
  #3  
89IROCZTPI's Avatar
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From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
Sounds like a plan, I removed the IAC once and cleaned it out, as for the TB,do I just spray the fuel injection cleaner/carb spray stuff all in it? Ill replace the IAC too while im in there, thanks for the response!
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Old Oct 7, 2004 | 08:46 AM
  #4  
89IROCZTPI's Avatar
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From: South Carolina
Car: 1989 IROCZ
Engine: Rebuilt 350 TPI
Transmission: 700r4
Well Danno, looks like I owe ya a big one, cleaned out the TB real good and replaced the IAC and the car started right up. Taught it how to Idle and its running perfect now, thanks a ton!!!
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Old Oct 8, 2004 | 05:44 AM
  #5  
Danno's Avatar
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From: Warrington, PA USA
Car: "02 z-28
Engine: LS-1
Transmission: 4L60E
Thats good news. Most dealer service depts now do throttle body cleaning as part of a scheduled tune up. I do mine on all the cars once a year.
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