Hello...first time caller..hope things can be resolved here. I have 11 codes (paperclip) method..18 19 31 35 36 54 65 78 81 82 83. I have changed the fuel filter and lift pump as well as new fuel lines. The OPS is fine too. I'm going to replace glow plugs next. My PMD is mounted on heat sink on top of manifold so not sure.

Hard to start and stalls intermittently now while driving. I put a used tranny in last year and since then its been hard to start. Not sure if the fact that the electronic connector to tranny has something to do with it as the wrecker that sold me the 93 tranny adapted it to fit 94 connector? Said is was easy fix.
Thanks for any knowledgable help..

 

I just cancelled the engine service light and now down to 4 PMD codes.. 18 19 35 and 54 from 11. Pump cam reference pulse error, crankshaft position reference error, injection pulse width error, and P.C.M. fuel circuit error respectively. Any one with some advice?
Is this a PMD replacement fix?

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I might ad that its a 94 chev Silverado automatic with 4l80e tranny and 300k on it.

 

even if its not the pmd its not a bad part to have a spare just encase yours is or does go bad

 

Okay thanks I think I should have an extra one to but they are $410 bucks here in Canada with the adapter, resistor, sink etc. I don't think taking a chance on a used one is a good idea as it could be hooped too. My next guess after checking into it a little deeper is the app...accelerator pedal potentiometer or the optical gadget in the IP.
I appreciate your suggestion though..thanks.