Maf & Iat Problems
07-07-2008, 09:21 PM
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Maf & Iat Problems I have a 98 vette cammed boltons....it keeps throwing a high circut iat sensor code....i also have a delphi 85mm truck maf on it and iv tried changin the iat sensor but it still throws a code and runs like crap right now...it runs better w the check engine light on...any guesses how to fix?
07-08-2008, 09:34 AM
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High faults are an open circuit somewhere in the
IAT wire-chain. Ground, flaky connector, etc.
Check the connector pins and any adaptor harness.
Use a voltmeter and a needle to probe the IAT
connector wires, ground side should be 0.0V and
signal side a volt or three. Open faults will pull to
5V. You will find your open between the last "sane"
and the first 5V measure-point, just keep narrowing
it down.
IAT wire-chain. Ground, flaky connector, etc.
Check the connector pins and any adaptor harness.
Use a voltmeter and a needle to probe the IAT
connector wires, ground side should be 0.0V and
signal side a volt or three. Open faults will pull to
5V. You will find your open between the last "sane"
and the first 5V measure-point, just keep narrowing
it down.
