S: Car breaking up when throttled


May 06

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S: When you rev the motor, car cannot go above certain rpm (often over 3k rpm).  It is indication of open loop as far as measuring air input.

C: No signal from MAF or MAF voltage static low ~ 0.2v for example (ecu sees it as error and runs open loop based on throttle input and other sensors).

Solution:

Inspect & replace MAF.


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