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Also did a WOT test to check operation of throttle body its definately opening to 100%.
Idle reset obdwiz pdf#
To answer some questions, trans fluid was checked and is OK, the APPS I am concerned with is part of the gas pedal, I did do a throttle relearn (no change), spark plugs are NGK all 16 3.8k to 4.3k ohms, the PDF attached has test of APPS using OBDWiz software (same result as the Launch), the engine cuts out completely but restarts straight away (well as soon as you can get it in neutral)Ĭoil current for all coils and primary voltage #1, is the current and voltage high because these are waste spark coils. Sorry should have said throttle body cleanedĬarried out checks on all 5v refs and grounds at APPS connector all good, still puzzled why the scope patterns show no dropouts its almost like the ECM is reporting the dropouts Following service including replacing sparkplugs and although the engine does sound much smoother the cutting out is still there. The engine should idle properly under control of the ECM. This will now reset the IAC to a known key-off 'park' position. Turn the key on, wait 10 seconds or so, and turn the key back off. I have since done a test (engine not running) with the PICO at the APP connector and at the ECM which apart from the voltage difference seem to be good. (This will cause a complete ECM reset of all learned parameters, including the learned IAC ones.) Then reinstall the ECM fuse. No fault codes are present, did a test run max 35mph during which the cutout/stall occured, recorded data on Launch, APP1, APP2, RPM, O2B1S1, O2B2S1, STFT11, STFT21, INJ1 Pulse, MAF, all looked good apart from APP2 which has lower voltage and what looks like dropouts (a post some where else thought this might be normal?). Jeep in for MOT and service, noticed prior to doing any work that the engine would cut out occasionally when coming to a full stop at traffic lights or a junction.