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Stalling, rough idle, jerks while driving

gingerlygingergingerlyginger Member Posts: 4
edited March 2014 in Pontiac
I have recently noticed my car will stall when I try to turn it on. It does not do it all the time but when it does, it takes 2 or 3 times to get it to turn on. It also idles very rough and it jerks while I'm driving. It feels almost like a dead miss(just had a tune up, BUT my plugs are not double platinum) a local mechanic suggested I get my throttle body cleaned because he could not find a thing wrong with it. Said plugs were still good, intake gasket looked good, checked my battery, starter and my pressure pumps. I got my throttle body cleaned and no luck. Any advice?

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    bpeeblesbpeebles Member Posts: 4,085

    Did you get a tankfull of bad gas?

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    gingerlygingergingerlyginger Member Posts: 4
    I always get gas at Kroger. I never thought of that. I will try getting gas somewhere to see if it helps the jerking and rough idling. The stalling has been going on for over 6 months.
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    bpeeblesbpeebles Member Posts: 4,085
    edited March 2014

    Oh- if it has been going on that long, it is unlikely to be your fuel.

    From your description, it sounds like either ignition or fuel-injection. However, you suggest that your mechanic has looked at both of these areas. It could be something as esoteric as poor power-conneciton to the onboard computer or crankshaft-sensor.

    Are you seeing any CEL (Check Engine Lite) ?

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    gingerlygingergingerlyginger Member Posts: 4
    Even though he checked the fuel pump pressure, does that sound like a pump going bad?
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    bpeeblesbpeebles Member Posts: 4,085

    @gingerlyginger said:
    Even though he checked the fuel pump pressure, does that sound like a pump going bad?

    My experience with fuel-pump is usually GOOD -or- BAD. Rarely, a fuel-pump can become weak but this usually shows up as stumbling at highway speeds.

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    bpeeblesbpeebles Member Posts: 4,085

    With many cars, a mechanic can hook-up a computer and DRIVE it until the problem shows up. The computer will 'capture' the failing component on disc so it can be 'played back' to see it happen.

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    gingerlygingergingerlyginger Member Posts: 4
    edited March 2014
    I will call tomorrow to make sure he checked my pump pressure. He did get it to surge/jerk for him. After he cleaned my throttle body, he could not get it to do it again. It normally happens at lower speeds and I will lose power going up hill
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