02-15-2019, 12:47 AM
ok not what all you've done to this 1996 Geo Tracker Automatic Transmission (i think it’s a 4 speed). IDK...
holding the throttle open, tells me (that trick) (IAC dead or gross misfiring)
1: the IAC is dead, and not open cold engine. making hard starts and flooding, and even needing to add say 5% throttle to start engine)
2: what does your scan tool tell you, NO DTC? or a list of DTC errors.? (can't fix any car lacking this very critical tool,, after all if the ECU sees errors, why Ignore, any, critical error?)
3: lots of things must be right for this car fast idle cold start.
cam timing right, spark timing, compression at spec, not 100PSI but near 180psi.
4: bad fuel.
5 fuel pressure at spec key and idling. (both must be at spec)
6: mAF not dead, and actually working or engine goes to limphome mode. (clean the maf yet?)
7; ECT reads right (see ECT engine coolant temperature ) test page using any dmm set to ohms.
8: vacuum leaks if cold will cause engine to race, if engine hot (180f) to stall. (lean) is the thermostat missing or 20years old, oops. (extreme leaks)
9:at the least
holding the throttle open, tells me (that trick) (IAC dead or gross misfiring)
1: the IAC is dead, and not open cold engine. making hard starts and flooding, and even needing to add say 5% throttle to start engine)
2: what does your scan tool tell you, NO DTC? or a list of DTC errors.? (can't fix any car lacking this very critical tool,, after all if the ECU sees errors, why Ignore, any, critical error?)
3: lots of things must be right for this car fast idle cold start.
cam timing right, spark timing, compression at spec, not 100PSI but near 180psi.
4: bad fuel.
5 fuel pressure at spec key and idling. (both must be at spec)
6: mAF not dead, and actually working or engine goes to limphome mode. (clean the maf yet?)
7; ECT reads right (see ECT engine coolant temperature ) test page using any dmm set to ohms.
8: vacuum leaks if cold will cause engine to race, if engine hot (180f) to stall. (lean) is the thermostat missing or 20years old, oops. (extreme leaks)
9:at the least
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