Some of you may know that I did a top swap on my 1997 GP SE, if not see 1997 GP Top Swap Well it's running somewhat better but I am getting two codes P0101 - Mass Air Flow Circuit range/performance problem and also P0121 - Throttle Position Switch range/performance problem. When P0101 comes up the RPMS drop way down and I have to give it gas to keep it running, but if when P0121 comes up P0101 wont and it drives decent but still with a higher idle. Any ideas?

-- Mon Jun 27, 2011 6:42 pm --

Strike we found the little gremlin! The throttle blade wasn't closing all the way. It was catching up and staying open maybe 1/8 inch. Barley filed it and it closes all the way. Took the car for a ride and it's a completely different animal. Showing 6 psi over the 4 to 5 it was pushing and no more codes. Thanks for everyone's advice here!

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Bryan,

1997 GP - Heads drilled for injectors, 98 ported s/c, ported lim, CAI, 3.5 Pulley, ZZP Tune, 1.75 In Primary and 2.5 In Collector headers, 3 In high flow cat, Autolite 104 coppers, MSD streetfire wires and blaster coil packs, my own poly upper motor mounts