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85 IROC-Z CAR ACCELERATES FROM STOP ROUGH. HELP PLEASE

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Old Feb 27, 2007 | 08:40 PM
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tripingeorge3's Avatar
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85 IROC-Z CAR ACCELERATES FROM STOP ROUGH. HELP PLEASE

Had a few running issues early. Car was spittng on pass side. But it went away. My issue now is lack of power from idle. its seems to shake idling. hit the gas and normal accelerating is rough. if i go WOT from start, it won't burn rubber, will accell rough, but then around 20 mph tires will let loose. ihave new: plugs gapped at .045, wires, accell super coil, ignition module, cap rotor, throotle body cleaner, stp fuel injection cleaner, and just had timing set correctly. Any ideas? I'm lost.
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Old Feb 27, 2007 | 08:44 PM
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From: Phoenix, AZ
Car: 1985 Z/28
Engine: L98 Carbed
Transmission: T5
Axle/Gears: 9 Bolt Posi 3.45
Have you checked your fuel pressure?
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Old Feb 27, 2007 | 08:54 PM
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tripingeorge3's Avatar
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yeah its at 42lbs with the fuel pressure regulator unhooked and car runs faster but the same. 38 lbs with fuel regulator hooked up.
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Old Feb 27, 2007 | 09:01 PM
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From: Phoenix, AZ
Car: 1985 Z/28
Engine: L98 Carbed
Transmission: T5
Axle/Gears: 9 Bolt Posi 3.45
Since you have pretty much all your ignition components new, it seems like it is fuel related. Are you getting any trouble codes?
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Old Feb 28, 2007 | 04:06 AM
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tripingeorge3's Avatar
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oh yeah forgot. also no trouble codes. one more thing, it has shorty headers and i just noticed theres no air pump.
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Old Feb 28, 2007 | 11:01 PM
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From: Pittsburgh, PA
Car: Cobalt SS/SC and 88 IROCZ
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: 3.73 Eaton Posi
i had that problem and one of my spark plug wires touched my headers and burned through and it was causing an arch
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Old Mar 2, 2007 | 05:53 AM
  #7  
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From: Lubbock, Tx
Car: 1991 Camaro Z28
Engine: L98 5.7 350 TPI
Transmission: Brand New (again) 700r4
Axle/Gears: GM 10 bolt 7.625 W/ TrueTrac 3.23
This is the same problem i am having problems with. I have to check for a burnt wire.. .thanks.
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Old Mar 2, 2007 | 07:27 AM
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From: NYC / Jersey
Car: 1990 Trans Am GTA
Engine: Turbo 305 w/MS2
Transmission: 700R4
Definitely sounds like a bad mixture. Fuel pressure sounds good, but how about your fuel injectors? I know you mentioned that you added cleaner, but this can sometimes do more harm than good. Are they the stock ones? Try removing them, and cleaning them thoroughly (might be clogged)...
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