Question about 2007 Mazda B3000

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2001 B3000 Mazda truck vibrating when idling and accelerating but not when accelerator is released. Rotten egg smell when problem began, but seemed to fade when heater turned off. No smoke or odor under the hood. Firing order checked and #6 wire was misfiring, but was replaced. Coil pack replaced with no positive results.

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  • rjw40 Mar 05, 2009

    My husband had a friend put some sort of machine on it last night. The only thing it showed was a misfire from firing order #6. Spark plug was good but he did replace the wire, which, by the way, had no end to it. Was told if it was catalytic converter the machine would have shown that. Strange thing: vibrates when idling and accelerating while riding, however, when you release accelerator while riding the vibration stops. The rotten egg smell seems to not be an issue after the initial problem started.

  • pspurlock Mar 05, 2009

    The same thing is happening to my truck. A 2005 3200 Mazda. It vibrates while idling and accelerating but stops when you let off on gas. Worse when going up hills. I also smelled bad smell when problem first started but not since. Very sluggish also; like it does not want to change gears.

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Have you had the catalytic converter checked at the local exhaust shop? try that first. is the truck a 4wd? time to start checking the ujoints. do a compression check on all cylinders and see if there is a major drop in that hole that is misfiring. let me know what you come up with.

Posted on Mar 05, 2009

  • brian tessereau Mar 06, 2009

    all right guys and/or gals. the vibrating is actually not going away when you let off the accelerator it is not going to be present when the vehicle is not under a load, as when you let off it is then coasting. have you checked the hydro carbons in the engine at all that will show a blown head gasket, hence the smell out the tailpipe and the low compression reading. you can usually pick up a block tester at the local parts storefairly easy to use. i would possibly start there. you can check to see if coolant is low or milky a little but sometimes that wont tell you, check oil level and see if it is high on the dipstick sometimes you get lucky there too. do either one of the vehicles back fire when they run rough? usually that is a tell tale sign of fuel/air issues. does either one of the trucks have any check engine lights on? if so what code if any has been pulled? let me know and ill start searching deeper and will get you the answer.

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