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  1. #1

    Default car revs at idle?

    I have an 82 capri 5.0 and while the car is warm, at idle it revs up to about 1300 rpms then back down. It does it fairly periodically. what could the problem be?

  2. #2
    FEP Power Member Jerry peachuer's Avatar
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    Is it efi swap ? Or carb

  3. #3

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    it is carb. stock 2 barrel and intake, it was rebuilt 40k miles ago, 12 years ago. so it did a bit of sitting around. not sure if maybe that would help narrow down what it could be

  4. #4
    FEP Power Member Jerry peachuer's Avatar
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    Reason I asked was vaccum leak on efi would spike the idle
    Vaccum on a carb would lower idle or make it stall out

  5. #5

    Default

    Try disconnecting the throttle cable, and see if it does it.
    '88 Mustang GT convertible, T5, 3.08:1 gears. 5.0 Explobra Jet: A9L Mass Air conversion, Fenderwell Mac cold air intake, 70mm MAF meter = 4.6 T-Bird/Cougar housing + '95 Mustang F2VF-12B579-A1A sensor, aftermarket 70mm throttle body and spacer, Explorer intakes, GT40P heads with Alex's Parts springs and drilled for thermactor, Crane F3ZE-6529-AB 1.7 "Cobra" roller rockers, Ford Racing P50 headers, Mac H-pipe, Magnaflow catback, Walbro 190 LPH fuel pump, UPR firewall adjuster and quadrant with Ford OEM cable, 3G conversion ('95 Mustang V6), Taurus fan, rolled on Rustoleum gloss white paint...
    Past Four Eyes: Red well optioned '82 GT 5.0, Black T-top '81 Capri Black Magic 3.3L 4 speed, Black T-top '84 Capri RS 5.0 5 speed.Over 200,000 miles driven in Four Eyes, and over 350,000 in Fox Body cars.

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