Question about Cars & Trucks
3 cyl engine, suddenly began backfiring with loss of power
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: idles rough ,loss of power
I had this same problem on mt 2004 jetta. It had 85,000 miles on it. one day it bagan to idle rough but seemed fine when at higher sppeds/rpms. after a weekm I took it to the dealership and it turned out that a few of the coils/springs were shot. they also replaced my spark plugs, costing me about $550 total. But the car runs great again.
Posted on Nov 11, 2009
You want to check your timing for accuracy and then check all plug wires for burned or cracked ends. Also check the single coil tower where the coilwire connects for very small cracks. Then check the inside of the disrtibutor cap for the same small cracks. Throughout this process I'm certain you'll find the culprit. Thanks, Dana
Posted on Jan 30, 2010
probably the throttle position sensor,but also could have jumped time.i would take the T.P.S. out and check the resistance,i am not sure what the correct resistance is for that model but you can find out at the parts store.
Posted on May 07, 2010
THIS JUST HAPPENED TO MY 5.4. HAD IT PUT ON COMPUTER TO FIND OUT WHICH CYL'S WAS MISFIRING, AND REPLACED THE COIL PACKS ON THOSE CYL'S. THIS FIXED MY PROBLEM. IT WAS AN EASY FIX BUT EACH COIL PACK IS AROUND 50$, AND EACH CYL. HAS ITS OWN SO THERE IS 8 ON OUR ENGINE NOT A CHEAP FIX. NOT GOOD TO TRY TO DRIVE WHEN ENGINE LIGHT IS FLASHING WAS TOLD THIS CAN CAUSE CATASTROPHIC DAMAGE TO THE ENGINE. HOPE THIS HELPS, AND GOOD LUCK.
Posted on Dec 29, 2010
I Have a 1999 ford f150 4.6 that back fires and is just running really ruff when idling alot of nack fire a sord of like a pulse going on what is my problem?
Posted on Oct 12, 2011
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