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failing-map [2017/10/27 10:42] twdorris created |
failing-map [2024/03/15 11:16] |
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- | ====== Identifying a Failing MAP ====== | ||
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- | Customer's engine was dying while cruising down the road and you can see very little response in engine RPM to modulation of throttle. | ||
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- | The cause appeared to be a failing MAP sensor resulting in lean mixture (speed density). The smoking gun, IMO, was the sudden dip in reading while the throttle was closed. Without that, it might have been a little more difficult to identify the lower-than-normal readings with the throttle open, but even that is pretty clear if you're looking for it. You do not expect nearly 15 inHg of vacuum with 40-50% throttle... | ||
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- | **NOTE:** This seems to be a 5 or 6 year-old MAP sensor with unknown history to it. These Omni 4-bar sensor really don't fail very often. | ||
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