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1994 "codes"

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Old 10-22-2007, 05:58 PM
shorthair shorthair is offline
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1994 "codes"

My wife's explorer has a hesitation when accelerating also running rough at all speeds . code #'s 157, 167, 159,173, 137, 536, 538. I have cleaned the mass air flow sensor 3 times this week & it still doesn't run any better help .

thanks in advance
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Old 10-22-2007, 07:05 PM
shorthair shorthair is offline
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also checked voltage on the mass air flow & got a&b 14.26 and c&d .68 running
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Old 10-22-2007, 11:42 PM
mrshorty mrshorty is offline
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When resolving a list of EEC-IV codes, you start with the KOEO codes (1st set output during the KOEO test before the separator pulse/code 10). You didn't specify which codes were which, but I looked up those codes, and the only likely KOEO code I see is the 159. Was the 159 a KOEO code or a KOER code?

I'll also note that KOER 167, 536 and 538 are almost always operator error. They are usually from neglecting to press the brake immediately after engine id and neglecting the "goose" test.

Remember that trouble codes only point to problems in circuits, not just sensors. A break in the wiring between the MAF and the PCM (or other sensor and the PCM) could easily be the cause of the codes.
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