Here is the scoop -- "Check engine" light flashes briefly (1/2 second) and engine quits for 1/2 second, particularly when the RIGHT FRONT wheel hits a rough bump -- typically, the engine flat-out quits for 1/2 second -- DEAD -- RIGHT NOW DEAD -- followed by a very brief check-engine light flash in dashboard -- then engine resumes with a definite miss of one or more cylinders that resolves itself within 2-3 seconds, and engine returns to firing on all six cylinders.
Recently, after above occurred, I brought the car to a stop at a red traffic signal. The idle was stuck at 1500 RPM, and would not return to normal speed. Turned car off, then restarted -- engine idle returned back to normal.
What is causing the engine to briefly cut-out, every time I hit a moderately severe bump -- problem is worse when suspension is set to "FIRM".
A possibility? -- have some kind of go-fast computer chip attached to factory computer -- possibly the contacts are dirty or corroded, and/or the EEC is loose on its kick-panel mount, and is bouncing around?
Is this an early symptom of a pending harmonic balancer failure?
Are old motor mounts allowing the engine to sit too low in the chassis, so that every time car bounces hard, motor pinches something? When experiencing this momentary dead-motor issue, I have not noticed any blip or flicker in any of the dash or headlights, suggesting that the issue is not likely some sort of a intermittent dead short.
Brief history -- car is factory stock (except for 3rd party EEC chip) 1990 SC 5-speed, that has been in storage since late 1997, due to blown head gasket. At the time of storage, EVERTHING else worked perfectly -- all electrics, alarm, and other mechanicals. Recently replaced motor with a good running stock donor 1990 SC motor -- am trying to iron out YEARS of storage-accumulated bugs and hiccups in the electrics and mechanicals.
Thanks for the assistance.
Cammer
Recently, after above occurred, I brought the car to a stop at a red traffic signal. The idle was stuck at 1500 RPM, and would not return to normal speed. Turned car off, then restarted -- engine idle returned back to normal.
What is causing the engine to briefly cut-out, every time I hit a moderately severe bump -- problem is worse when suspension is set to "FIRM".
A possibility? -- have some kind of go-fast computer chip attached to factory computer -- possibly the contacts are dirty or corroded, and/or the EEC is loose on its kick-panel mount, and is bouncing around?
Is this an early symptom of a pending harmonic balancer failure?
Are old motor mounts allowing the engine to sit too low in the chassis, so that every time car bounces hard, motor pinches something? When experiencing this momentary dead-motor issue, I have not noticed any blip or flicker in any of the dash or headlights, suggesting that the issue is not likely some sort of a intermittent dead short.
Brief history -- car is factory stock (except for 3rd party EEC chip) 1990 SC 5-speed, that has been in storage since late 1997, due to blown head gasket. At the time of storage, EVERTHING else worked perfectly -- all electrics, alarm, and other mechanicals. Recently replaced motor with a good running stock donor 1990 SC motor -- am trying to iron out YEARS of storage-accumulated bugs and hiccups in the electrics and mechanicals.
Thanks for the assistance.
Cammer
Last edited: