can someone help!!!
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can someone help!!!
will ca clogged catalytic converter cause my 03 ranger and miss fire and die out at fwy speed it seems fine driving around the city but under any kinda of hard load when i step on the gas i slow down.
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From: SW Va
A number of things could cause your wimpy power problem. Right now it sorta sounds like a fuel delivery/fuel trim problem. Do you have a CEL lit???? If so, most autoparts stores will scan the computer for trouble codes at no cost, then post all the code Numbers, as they can provide good trouble shooting clues.
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Joined: Jan 2004
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From: SW Va
OK, good feedback on the P0306 trouble code. A misfire under load is usually a spark problem, so the spark plug, plug wire & their connections belong on your suspect list.
Closely inspect for improper/excessive plug gap, cracked, chipped, dirty internal or exrernal plug insulator, damaged plug wire conductor/improper resistance, contacts, loose contact on both ends, damaged insulation, or improper routing, use the factory route & all of the wire looms.
If no joy, maybe raise the hood after dark & look for arcs & sparks along #6 plug wire all the way to to the spark plug. If nothing, with the engine at warm idle, try a "wet down" test, all along #6 plug wire & plug boot with a spray bottle of water & look for arcs & sparks, or a rough idle.
Still Lots of unknowns, so you could have more than one problem, was the problem there before the new parts???
Closely inspect for improper/excessive plug gap, cracked, chipped, dirty internal or exrernal plug insulator, damaged plug wire conductor/improper resistance, contacts, loose contact on both ends, damaged insulation, or improper routing, use the factory route & all of the wire looms.
If no joy, maybe raise the hood after dark & look for arcs & sparks along #6 plug wire all the way to to the spark plug. If nothing, with the engine at warm idle, try a "wet down" test, all along #6 plug wire & plug boot with a spray bottle of water & look for arcs & sparks, or a rough idle.
Still Lots of unknowns, so you could have more than one problem, was the problem there before the new parts???
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Joined: Dec 2003
Posts: 18,423
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From: iowa
Had a misfire on my 4.0 and since I had just put in new plugs and wires less then 500 miles before started looking at injectors etc. In the end I took the plugs out and tested each one and found a bad plug. Yes bad at 500 miles. replaced it and the miss went away.
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