ok, first my check eng. light came on, then i shut the truck down and did the key on/off test and came up with a P1693
don't know what the code means

i went to AAP and used there code reader and it came up with 1690 and 1690p/d any help would be great thanks

 

1690= IP ckp sensor does not agree with ecm ckp problem in fuel sync signal; possible IP timing problem; does it have low power, or did the motor die?

 

the truck drives fine before and after the light came on. the only thing that's been going on is that at idle i can watch the fuel light on the tst box flicker instead of not coming on at all at idle. it sorta makes the truck sound like a gasser with a small lope.

i'm finally getting around to put my FASS II in, actually in the process right now. i'm going to try to get my gauges in tomarrow, or at least my fuel pressure.

i was wondering if one of the sensors on the filter canister could have gone out and tripped the code.

also by chance could my map sensor be going bad and trip the code?

 

well kock on wood, i just got done install'n the pump and what do you know the ckeck eng light no longer comes on. now i'm going back to AAP and clear the codes hopefully it works

 

Yeah - low lift pump pressure can do that.

 

well i cleared the codes and just went back outside to check the truck and NO codes popped up.