hesitation on take-off
11-16-2002, 08:34 AM
#1
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Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
hesitation on take-off
First I want to say how big a help ThirdGen has been. Thank you all.
Now for my question. I'm having a really bad hesitation on take-off and sudden throttle openings. Like if I'm going around a turn and I'm off the gas and then suddenly on it again the car bogs and jerks and then takes off. I'm pretty sure the problem is the pump shot. I have the orange pump cam in the #1 position. Now should I buy a more aggressive pump cam or change the shooters? BTW timming is 22 deg adv at idle and 36 deg adv at 3000rpm. Thanks for all the help.
Now for my question. I'm having a really bad hesitation on take-off and sudden throttle openings. Like if I'm going around a turn and I'm off the gas and then suddenly on it again the car bogs and jerks and then takes off. I'm pretty sure the problem is the pump shot. I have the orange pump cam in the #1 position. Now should I buy a more aggressive pump cam or change the shooters? BTW timming is 22 deg adv at idle and 36 deg adv at 3000rpm. Thanks for all the help. 
11-17-2002, 12:42 PM
#2
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Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
Move up in squirter size.What are you at right now?Did you change to the orange cam or that was stock setup?
11-17-2002, 02:35 PM
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Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
The orange cam in the #1 position is the stock set up. The shooter is a .025 and I have already ordered a .028. I'm hoping this will fix the problem and I won't have to go and buy .031. Thanks for the repley. I should get the shooter on Monday or Tuesday and I"ll post the results.
11-19-2002, 08:31 PM
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Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
I changed shooter to a #31 and it totally changed the for the better. Throttle response is immediate and very smooth. Thanks for all the help.
11-19-2002, 08:56 PM
#5
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Car: 1982 Z28
Engine: 355
Transmission: T56
Axle/Gears: 12 Bolt
Anytime I can help..glad to see all is better.Makes it so much nicer to drive the car when it runs good huh?
11-20-2002, 07:29 AM
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Car: 87 IROC-Z
Engine: 350ci
Transmission: T-5
I do thank you for the help. It does run so much better now. I bought this car with "some assembly required" and after 6 months or so of hard work and late nights it was all worth it. BTW this is my first Third Gen and also my first V-8 and First rear wheel drive car I have ever owned.
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