Question about 1998 Isuzu Trooper

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Backfires upon acceleration, idles smoothly - 1998 Isuzu Trooper

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  • clanmcbride Apr 24, 2009

    I have the same problem. My dodge avenger idles just fine, but struggles while driving. it will drive fine, and then suddenly start to backfire and make "popping' noises.

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  • 15 Answers

Check the list ....it may help


Engine misfires periodically =

Ignition coil layer shorted > Replace
Spark plugs fouling > Clean or install hotter type plug
Spark plug(s) insulator nose leaking > Replace
Fuel injector(s) defective > Replace
Powertrain control module faulty > Replace

Posted on May 06, 2009

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Hello;
Most likely cause is a broken valve spring on one of the intake valves. Seat pressure is light enough to idle smooth but on acceleration the dynamics increase the pressures and the spring can not keep up. Hangs the valve open breifly and you get a backfire through the TBI.
Hope this helps.
Thanks;
Rich
RPM Northwest

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