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Author Topic: 94 2.5 beginning to backfire...  (Read 781 times)

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geocachenut

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94 2.5 beginning to backfire...
« on: April 22, 2012, 06:39:23 PM »
 :'(  Over the winter (I don't drive her in the winter), I had the throttle body bored to 63 MM, changed out the plugs, cap and rotor.  For some reason, when I am getting on the highway (foot to the floor) and changing gears, it has begun to backfire.  I also replaced the exhaust.  Anyone have any ideas what might be going on?
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Offline sharpxmen

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Re: 94 2.5 beginning to backfire...
« Reply #1 on: April 22, 2012, 07:03:19 PM »
what's the plug gap set at? any O2 sensor issues or any codes?

if none of the above my guess it's a leaky injector
« Last Edit: April 22, 2012, 07:04:12 PM by sharpxmen »
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'95 YJ, NSG370 6spd / Hurst shifter, Dana 300 + 4:1 Doubler / tri-stick, Custom skid, Super D35 / Auburn LSD / 4.88, 35x12.5x15 BFG KM2, 64mm t/b, 1.7 RollerRockers, MkVIII e-fan, Dual Diaph Booster
Latest: Corbeau BajaRS heated seats :dance: keeping warm the rear end

Offline grumpygy

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Re: 94 2.5 beginning to backfire...
« Reply #2 on: April 23, 2012, 08:52:01 AM »
Been thinking on this one if it just started after sitting  there are a couple of things to check.  Moisture in the Ignition system.  Or More like it the fuel has collected Moisture  and this  10% stuff gets is straight out of the Air..
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94 YJ, Cool Air intake, 19lb Inj, 4.0 Throttlebody with spacer,  31/10.50/15's
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