Question about 1999 Chevrolet S-10 Pickup

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Truck shakes when stoped at idel

I changed the plugs, wires , distributer cap, and rotor still shakes any ideas?

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  • Chevrolet Master
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I am going to guess you have a 4.3 vortec. Common issues with the vortec is the CSFI system needs to be cleaned, the valve on the poppet valve (Fuel Injector) is dirty with carbon build up. You can have it cleaned at the dealer with a machine or you can try with using the common fuel injector cleaner. The other thing that works well is to add one can of Seafoam to a full tank of gas and run it through until it's 1/4 from empty and with a second can of Seafoam, Try cleaning the upper intake by following the instructions on the can, there will be lots of smoke just to warn you but it's safe. DO a search on Youtube on Seafoam to give you better idea on how it's used.
At worst, your CSFI system is far to gone to be cleaned and will need to be replaced. The good news is that you can upgrade your CSFI to the MFI system that does not have the same issues as the CSFI and take about half the day to replace. Auto Zone or Napa , and the Dealer sells the MFI upgrade to your fuel injector system.
Thank you for using fixya and good luck and inspect all your vacuum hoses for cracks and any other damages.

Posted on May 08, 2010

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Posted on Jan 02, 2017

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My 99 dodge 5.9 r/t started shaking after setting for two weeks and I have changed the plugs and put injector cleaner in the fuel and checked the u* joints, any ideas?


You really need to check the Distributer Cap/Rotor/and Wires. There could be moisture around or in the Cap. The Distributor Cap is really rough to get at. You can't see it very well. If those are original plug wires - they are more than likely in need of replacement. If there is a date printed on the wires they are factory installed. Distributor Rotors can also short through to ground.

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I replaced wires plugs and distributer cap and rotor making note of gap .032 and placement of rotor. After finished I started and it ran real rough and check engine light came on any ideas??


The only thing I can think, besides coincidence, is the plug wires, you must have crossed one or two, I would go over the timing order again just to be sure. Or the cap is not seated on, Check it out, hope this helps.

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I have 1993 toyota camry v4 When i drive, if i push gas padle so hard the car begin to shake i think especially when the gear change in tranmition


sounds like the engine is misfiring .. often thats caused by arcing of aging ignition wiring and distributer cap ... you can change the following items:
spark plugs , distributer cap, rotor and ignition wiring .. that often fixes problems with that year car ..

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