backfire/hesitation under acceleration

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Dec 23, 2008, 07:38 AM

#16

boosted2x2

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check your egr valve

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Dec 23, 2008, 02:50 PM

#17

TakaseEVOIXSE

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Quote:

Originally Posted by boosted2x2

check your egr valve

interesting... havent heard that one.
Lemme go research why an EGR might cause issues like this....

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Dec 29, 2008, 11:39 PM

#18

TakaseEVOIXSE

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Jorge... its your plugs bro. The other guys were right. I just regapped mine from .028 to .022 and no more popping in the COLD WEATHER...

now on to my other issues... lol

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Mar 2, 2009, 03:11 PM

#19

DutchEVOVIII

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A little bit very late reply, but it turned out to be the plugwires for me, had Magnecor wires, put the stock ones back on and the problem was gone

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Apr 10, 2009, 11:18 PM

#20

kblock4life

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its the plugs

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Apr 11, 2009, 12:13 AM

#21

NWM_Tech

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the colder ambient makes the charge just a little bit colder (harder to ignite). The larger gap is harder to jump under pressure. Both combined mean ignition misfire until the boost comes back down

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Oct 9, 2013, 08:32 PM

#22

AnabolicEVO

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I'm glad to have seen this thread. Great info. Thanks guys

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Nov 9, 2018, 05:05 AM

#23

Shamas Hussain

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I have a similar problem

I have the same problem i have a Mitsubishi Evolution 6 355bhp with a 225 walbro fuel pump , a dump valve and a mushroom air filter apart from this the and a 3" straight through jap speed exhaust. The car drives fine when cold however qhen it warms up it stutters and backfires pretty bad after driving it for about 5/10 miles it goes back to normal.