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Runs OK but throwing codes 200 1992

uid 27's pic
posted by  Art Benstein on  Fri May 4 06:40 CST 2018
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last visit: Fri Oct 17 20:10 CST 2014
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Try first measuring the rest voltage from the AMM. On a 92 that's the red/white wire leaving the AMM connector you can reach by peeling back the boot. Measure it with key on engine stalled.

Then clean the connector on the AMM side, inspecting the harness side. Exercise it some (reseating it) to wear through any light oxidation layer. Do the same with the two grounds at the fuel rail mounting screws.

Next reset the ECU by momentarily lifting fuse 6 clearing both the codes stored and any adaptive trim.

Repeat the measurement of rest voltage, which is the AMM's output signal to see if anything changed by the cleaning you did.

This might be your lucky day, but there's no really good substitute for measuring fuel pressure, even though I describe the same all the time based on the likelihood of having an intact FPR. Doesn't your '92's rail have a Shrader fitting? I ask, not suggesting how to attach a gauge, but from curiosity that you haven't mentioned it.
--
Art Benstein near Baltimore

Bad decisions make good stories.






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New Runs OK but throwing codes [200][1992]
posted by  JWT  on Mon Apr 16 18:27 CST 2018 >


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