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Throttle issues

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Old 03-24-09, 07:14 PM
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Throttle issues

On my 88 vert the other day it would pull for 2 seconds and then not pull. It was if I was flooring the throttle then suddenly letting off. It did this the whole time. Thw tps ohms fine before the run and after. I searched the forum and 99% of the time it was recommend to check the tps.

any Ideas
Johny
Old 03-24-09, 07:54 PM
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sounds fuel related. maybe a dirty fuel pump strainer? check fuel pressure, also check your cats.
Old 03-24-09, 11:39 PM
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More specs on the car.
turbo?
you could be hitting fuel cut.
Old 03-25-09, 06:01 AM
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88 vert N/A bone stock except exhaust no cats defintly not fuel cut.
Old 03-25-09, 08:49 AM
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check the tension in both the throttle and cruise control cables. FSM calls for 1-2mm freeplay in the cable when properly tensioned. Make sure the retaining clip for the cruise control cable nut is still there.
Old 03-25-09, 10:09 AM
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Engine, Not Motor

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Are you saying the RPMs were up and down even though you weren't on the throttle?

Bad/misadjusted TPS and vacuum leaks are throwing the ECU for a loop so it is trying to compensate with the BAC. It then overshoots, gives up, tries again, overshoots, etc. and it repeats into a cycle.
Old 03-25-09, 03:44 PM
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RPM's were up and down while I was ON throttle and TPS is good
Old 03-28-09, 10:58 AM
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Engine, Not Motor

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Please describe the problem with exact detail.
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