C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Maf

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Old

Mar 24, 2019 | 12:35 PM

#1

bugman42@yahoo.con

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Maf

With key on what voltage should I read at power wire on MAF pigtail with MAF disconnected? One flow chart I have says system voltage (12 or so) another says 5 Mine reads .5 mV
This may help: 1986

Last edited by bugman42@yahoo.con; Mar 24, 2019 at 06:40 PM. Reason: Add info

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Old

Mar 24, 2019 | 06:42 PM

#2

bugman42@yahoo.con

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I have back traced the wire to the in side on the relay and lose it in a harness.

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Mar 25, 2019 | 01:20 PM

#3

3D-Aircrew

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Quote:

Originally Posted by bugman42@yahoo.con

I have back traced the wire to the in side on the relay and lose it in a harness.

Are you getting any MAF codes? 33, 34 or 36?

These 2 relays ... the MAF burnoff and the MAF Power relay are notorious for causing MAF issues.

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Old

Mar 26, 2019 | 06:40 AM

#4

bugman42@yahoo.con

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Yes. Been through all of that. Need to know what voltage I should be reading at unplugged MAF pigtail with key on.

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Mar 26, 2019 | 02:23 PM

#5

65Z01

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My '88 FSM shows +12 Vdc on the PPL power line from the MAF power relay, if the relay is activated.

Last edited by 65Z01; Mar 26, 2019 at 02:26 PM.

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Old

Mar 26, 2019 | 07:43 PM

#6

bugman42@yahoo.con

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Activated means key on correct? That is what my flow chart says at least.

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