87 IROC misses and hesitates, help!
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Member
Joined: Jul 2001
Posts: 105
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From: Mt. Holly, New Jersey
Car: 1992 Firebird Formula 350
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.23 Posi
87 IROC misses and hesitates, help!
My 87 IROC with a 305 TPI, 700R4 96K miles does this hesitation thing during slight acceleration. At about 1/4- 1/2 throttle, it sounds like it's missing, but when cruising or flooring it, it sounds fine. I replaced the spark plugs and cap and rotor, changed the fuel filter, and unbelievably, it's worse! The car is only driven about once a month; I don't know if that makes a difference. Any ideas?
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Joined: Nov 2000
Posts: 762
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From: Riverside, CA
Car: 1987 Camaro IROC-Z
Engine: 305TPI
Transmission: 700R4
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From: Bayville NJ and Newark at NJIT.
<font face="Verdana, Arial" size="2">Originally posted by ColinOpseth:
changing vacuum tubing..</font>
changing vacuum tubing..</font>
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1985 Camaro SC - 2.8L, auto.
http://www.xenodrgn.f2s.com/Frontright.jpg
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Joined: Apr 2000
Posts: 3,187
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From: E.B.F. TN
Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
What about your wires? It sounds like a cut/burnt wire.
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"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."
-Thomas Jefferson
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"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."
-Thomas Jefferson
Senior Member
Joined: Nov 2000
Posts: 762
Likes: 2
From: Riverside, CA
Car: 1987 Camaro IROC-Z
Engine: 305TPI
Transmission: 700R4
<font face="Verdana, Arial" size="2">Originally posted by Red Devil:
What about your wires? It sounds like a cut/burnt wire.
</font>
What about your wires? It sounds like a cut/burnt wire.
</font>
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Webmaster: www.IROC-Z.org
Senior Member
Joined: Nov 2000
Posts: 762
Likes: 2
From: Riverside, CA
Car: 1987 Camaro IROC-Z
Engine: 305TPI
Transmission: 700R4
<font face="Verdana, Arial" size="2">Originally posted by Xenodrgn:
Every mans worst nightmare.
</font>
Every mans worst nightmare.
</font>
it took me about 2-3 hours to do it, but i had my Dad hold the wire in the OEM shape while I heated it with a match so that all of the bends look stock...
you really have just 2 main on the pass rear of the intake, the one going from behind the EGR up to the front of the throttlebody and then the one from the TB over to the drivers side..
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Joined: Apr 2000
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From: E.B.F. TN
Car: Tree Huggers
Engine: Do Not
Transmission: Appreciate Me.
<font face="Verdana, Arial" size="2">Originally posted by ColinOpseth:
if it was wires it would always run bad..
</font>
if it was wires it would always run bad..
</font>
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"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."
-Thomas Jefferson
Thread Starter
Member
Joined: Jul 2001
Posts: 105
Likes: 0
From: Mt. Holly, New Jersey
Car: 1992 Firebird Formula 350
Engine: 5.7 TPI
Transmission: 700R4
Axle/Gears: 3.23 Posi
I forgot to mention, the car only gets about 170 miles to a tank of gas, and there was black carbon buildup on the plugs. I also changed the O2 sensor.
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Joined: Jan 2001
Posts: 1,978
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From: PA
Car: 88 Firebird WS6
Engine: 350 TPI
Transmission: T56
Axle/Gears: 3.42
It may be an ignition pickup coil. Sometimes they get an intermittant open... Do you have a problem of frequently changing modules?
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