Author Topic: 1986 C4 MAF Sensor replacement?  (Read 664 times)

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Offline Vettech

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Re: 1986 C4 MAF Sensor replacement?
« Reply #24 on: March 25, 2020, 08:48:20 PM »
If cct 998 goes O/C, then the ECM will see a high signal voltage and set a code 33, meaning it thinks the MAF air flow is too high.

On my 87 I got 33, 34 & 36, if not one then the other, the relays look the same BUT THEY ARE NOT.

Ensure correct relays, then I ripped out some wiring or cut & replaced connectors, all the connectors, wires etc were well & truely cooked, hardened and filled with greace and oil and other general crap. Eventually all went well.

Sorry if I'm a bit vague, with all this Corvid19 going on, its hard to concentrate.

Regards

Vettech.

Offline peterw

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  • Car: 1986 C4 Coupe Red
Re: 1986 C4 MAF Sensor replacement?
« Reply #25 on: March 26, 2020, 12:07:14 AM »
Thanks for the info.

I will contact Chevparts about the manual.