VetteLee
Member
I had my 1987 Callaway serviced recently: transmission rebuild, new clutch and replacement of the thermistor used to measure water temp for cold starting. On the drive home from the shop, I got a check engine light and found it was a code 33. After clearing the code, it will usually reappear after driving the car, but not always. I've replaced the related relays.
The Corvette shop said the Mass Air Flow Sensor could be bad, but it might be the ECM. They can swap in a test Mass Air Flow sensor.
Is it likely the problem is something else? I'm suspicious that I didn't have the problem until the work was done.
I'll run the checks as outlined by the service manual next to see if there are any obvious problems. Are the test harnesses offered by Mid America Motorworks useful?
If I decide to replace the MAF myself, can you make a recommendation for source/brand/model? I see there are various replacements and rebuilt units.
Thanks,
Lee
The Corvette shop said the Mass Air Flow Sensor could be bad, but it might be the ECM. They can swap in a test Mass Air Flow sensor.
Is it likely the problem is something else? I'm suspicious that I didn't have the problem until the work was done.
I'll run the checks as outlined by the service manual next to see if there are any obvious problems. Are the test harnesses offered by Mid America Motorworks useful?
If I decide to replace the MAF myself, can you make a recommendation for source/brand/model? I see there are various replacements and rebuilt units.
Thanks,
Lee