P0303

1996 FORD RANGER
448,000 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC
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RONSON
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  • 77 POSTS
I am still getting a P0303 code. I have replaced the intake and exhaust manifold gaskets, replaced the plug wires and plugs. And just recently ran some injector cleaner to see if it made a difference. Still runs rough, but not bad on freeway.
May 12, 2016 at 4:19 PM
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HMAC300
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  • 48,601 POSTS
misfire codes are hard to diagnose have a local mechanic scan it and freeze frame it so he can read voltages and see which sensor if any is messing up. also check compression.
May 13, 2016 at 6:39 AM