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Hey there. Ive got a 98' jimmy 4.3L. In the rain or damp weather my engine light comes on with misfires. Once it is in gear it has a rough idle and when accelerating it is slow an takes alot of power to get up to speed. I have replaced the wires, cap and rotor. Not sure where to go from here. Once youve been driving around and the engine warms up everything works perfectly fine no rough idle or slow acceleration.

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  • Tim Terzich
    Tim Terzich May 11, 2014

    You have a couple good answers. Good luck let us know what worked

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Some of these vehicles had issues with water getting under the hood through the seal at the cowl panel and getting into the back spark plug tubes, once the engine warms up and the water evaporates the engine will run fine. There is a replacement seal thatyou can purchase to solve this problem. Hope this helps.

Posted on May 11, 2014

Testimonial: "Ill give the wires a spray and see if that works. Cant really know until it rains next haha. But thanks for the advice!"

  • 3 more comments 
  • renegade May 11, 2014

    sounds like the mass air flow sensor may need replaced

  • Sarah May 11, 2014

    I did have a code pop up for a sensor a while ago not sure wht it said i couldnt remember.

  • Sarah May 11, 2014

    I did have a code pop up for a sensor a while ago not sure wht it said i couldnt remember.

  • Sarah May 11, 2014

    I did have a code pop up for a sensor a while ago not sure wht it said i couldnt remember.

  • Ed Warden
    Ed Warden May 12, 2014

    if you can remember that code or if it pops up again, please let me know and I'll try and help more

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Try using a water repellent on everything electrical and follow up with a soft seal product to seal off all the areas that water can cause a short.

Posted on May 11, 2014

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Posted on Jan 02, 2017

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SOURCE: 1998 honda crv misfire code 0303and 0304

problem solved mechanic had wires on wrong thanks

Posted on Nov 15, 2008

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SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Posted on Feb 07, 2009

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SOURCE: loss of power on acceleration. engine bucking.

check transmission fluid.change fuel filter and air filter.try changing up on where you buy gas .because bad gas causes problems.

Posted on Jun 26, 2009

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SOURCE: 98 dodge ram 1500 5.9 multiple cyl misfire. cyl 1

did you check to verify that you have the wires in the correct order possible distributor pick up bad

Posted on Nov 12, 2009

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SOURCE: 2002 Ford Taurus SEL, DOHC Misfiring

Disconnect the battery completely, try turning the key with the battery disconnected. Put the battery back together. The check engine light should be off now..

Posted on Aug 15, 2010

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