MAF ISSUES
07-21-2018, 10:23 AM
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MAF ISSUES
1988 TRANS AM..5.0 I've REPLACE EVERYTHING THAT'S REPLACABLE, CHECK ALL WIRING AND CARE STILL IS RUNNING ROUGH... ADDITIONALLY, IT'S STILL THROWING MAF CODE???? CAR'S BEEN DOWN A MONTH NOW, WITH NO WAY FORWARD. PUT THE BOSCH MAF IN YESTERDAY AND IT HELPED, BUT STILL NOT RUNNING THE WAY IT SHOULD. PLEASE HELP. JEFF
07-22-2018, 06:23 AM
#4
Re: MAF ISSUES
If you have replaced everything that's replaceable, what MAF is installed?
What about the MAF power and burnoff relays? Those are critical to the system operation.
How about the auxiliary oil pressure switch? That will interrupt the burnoff cycle, and eventually lead to a 34 as well as causing a 36.
What about the electrical connector at the MAF itself? Is there a solid 12VDc source present? Do both grounds have good continuity?
Are the inlet ducts intact and sealed? What about the throttle body, PVC, CCV supply air, and EVAP lines? Any leakage in any of those can contribute to a 34 code.
What about the MAF power and burnoff relays? Those are critical to the system operation.
How about the auxiliary oil pressure switch? That will interrupt the burnoff cycle, and eventually lead to a 34 as well as causing a 36.
What about the electrical connector at the MAF itself? Is there a solid 12VDc source present? Do both grounds have good continuity?
Are the inlet ducts intact and sealed? What about the throttle body, PVC, CCV supply air, and EVAP lines? Any leakage in any of those can contribute to a 34 code.
07-24-2018, 04:46 PM
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Re: MAF ISSUES
Vader,
The MAF Sensor is a rebuilt OEM (P/N 14094712) by Bosch. The NAPA crossover P/N is XT44712. All relays have been check, and also vacuum leaks. Order a throttle body from HAWKs prior to putting new MAF on, as smoke test showed it was leaking. That said, I haven't checked the auxiliary oil pressure switch, but all other items you mentioned have been checked. It runs fine at idle, but once
The MAF Sensor is a rebuilt OEM (P/N 14094712) by Bosch. The NAPA crossover P/N is XT44712. All relays have been check, and also vacuum leaks. Order a throttle body from HAWKs prior to putting new MAF on, as smoke test showed it was leaking. That said, I haven't checked the auxiliary oil pressure switch, but all other items you mentioned have been checked. It runs fine at idle, but once
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