mhuppertz Posted May 28, 2017 Share Posted May 28, 2017 I have replaced the coil pack and the ignition controller, but now I have a full throttle RPM miss. The exhaust is fairly loud so I don't think is a clogged CAT. Could it be the MAF? Link to comment Share on other sites More sharing options...
jonlabree Posted May 29, 2017 Share Posted May 29, 2017 It may sound dumb, But check you spark plug wires. Make sure you rewired it correctly. 1 Link to comment Share on other sites More sharing options...
89RedDarkGrey Posted May 29, 2017 Share Posted May 29, 2017 Yes, that is possible. Weak or leaking plug wires would also show up in the dark. Does it still stumble if in gear, foot on brake, throttle half way or more? Link to comment Share on other sites More sharing options...
2seater Posted May 29, 2017 Share Posted May 29, 2017 63Viking has a good point, several of us have been tripped up with the spark plug cable order, particularly the rear cylinders. It certainly could be other things but many times re-examining what was just done pays dividends. 1 Link to comment Share on other sites More sharing options...
89RedDarkGrey Posted May 29, 2017 Share Posted May 29, 2017 High pressure miss could be: Dirty or failing MAF Incorrectly gapped, worn, loose, or dirty spark plugs Incorrectly routed plug wires (Thank you 63Viking) Weak, cracked, leaking plug wires (check in DARK area) Dirty air filter or fuel filter Vacuum leak Weak fuel pump Weak fuel pressure regulator Weak or clogged injector(s) Partially restricted catalytic converter Failing O2 sensor police car behind you Link to comment Share on other sites More sharing options...
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