LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Getting Code 48: "MAF System Fail" - What besides the obvious?

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Old Jul 5, 2006 | 10:41 PM
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Getting Code 48: "MAF System Fail" - What besides the obvious?

I got my AKM cable in and Datamaster today and was playing around with it doing a log. It shows a code 48 - MAF System Fail. Besides and obvious faulty MAF, what else could cause this? All fuses are good I already checked them. It's plugged in good. I asked on a local town forum if anyone had a MAF I could swap in to see if that was the issue.

Would this be a reason why it ran great then started running like ***?

What can I check or test?
Old Jul 5, 2006 | 10:47 PM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

http://paradox.shacknet.nu/dave88lx/...es/383test.uni
Old Jul 6, 2006 | 05:30 AM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

Easy enough to check. Terminal C (pink wire) to terminal B (black/white wire) will measure 12 volts DC with KOEO. The yellow wire when measured to the black/white wire will measure between 4 and 6 volts DC.

If they all check out, put the meter on the wires so you can "wiggle" the wires while you check the readings.
Old Jul 6, 2006 | 07:50 AM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

Cool I'll check it out tonight thanks.
Old Jul 6, 2006 | 11:35 PM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

OK....

I have 13.xxV across the black/white and pink.

I have 6.3-7V between the yellow and black/white wire. Is that still OK? Or, do I have a problem somewhere else?
Old Jul 6, 2006 | 11:50 PM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

OK tried the new MAF, still getting a Code 48?!?
Old Jul 6, 2006 | 11:58 PM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

Are you sure the connector pins aren't bent or broken?
Old Jul 7, 2006 | 12:14 AM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

No...because when I checked the voltage, I stuck my multimeter into the end of the connector...

Car won't start now either. Started once, stumbled, hitting the gas pedal didn't change anything, it was all it had to stay stumbling, no rev or nothing.
Old Jul 7, 2006 | 12:18 AM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

Had that problem once, turned out I "thought" I had a good connection but it wasn't plugged in COMPLETELY. I also checked it a few times. Best advice I can give is check all the lines even leading up to ecu.
Old Jul 7, 2006 | 12:31 AM
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Re: Getting Code 48: "MAF System Fail" - What besides the obvious?

MMmmm....why doesn't someone just buy it instead.

I need to stick to Fords.
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