rochhound

1986 c4 my engine light is staying on rough idle etc!
maf air problem,im having problems finding the (maf power relay) my book says maf power relay and maff sensor burn off relay are next to each other behind the battery.
i only have located the burn off sensor behind the battery.
the crazy part is i have a 1986 c4 parts car build date 12-85 and it has both sensors behind the battery.
my other has a build date 04-85 lots of wiring differences.
my quess is i have a bad maf sensor located behind the air cleaner
i don t like parts changing when your not sure where the problem is
pricey part.
any help appreciated
thanks steve

Ray Quayle

Sorry, but the car with the 04-85 build date is actually an ’85, not an ’86. The one with the 12-85 build date is an ’86. Check the 10th digit of each car’s VIN. The 04-85 car is most likely an “F”, while the 12-85 will be a “G”. This is why you have a difference, the ’85 has a burn-off module in the cockpit not a relay behind the battery like the ’86 has.

rochhound

thanks for the info,do you have any idea where its located in the **** pit?.
thanks again
steve

the blur

I have been losing hair over intermittent codes 34 & 36 in my 1989. Runs good, then runs like crap.
I think I finally have it, although I replaced the MAF, the real culprit was the MAF relay.

Must of been getting weak internally.

rochhound

well I pulled my dash the bun or passenger cushion,and the lower kick panel . to no avail the part they refer to is not there there is a plastis box only.check the pics it is in the area where the maf sensor burn relay is supposed to be. the build date is 04-85,and i was told that the burn sensor is located passenger side under the dash. behind the battery there is only one relay. anyway im at a loss where to go next
any help appreciated
steve

rochhound

well I pulled my dash the bun or passenger cushion,and the lower kick panel . to no avail the part they refer to is not there there is a plastis box only.check the pics it is in the area where the maf sensor burn relay is supposed to be. the build date is 04-85,and i was told that the burn sensor is located passenger side under the dash. behind the battery there is only one relay. anyway im at a loss where to go next
any help appreciated
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