FMC80
SILVER Star
Dudes,
Here's the background: My truck is running pretty great. Solid idle and acceleration, no hesitation. This may or may not be related to the main issue but on very few occasions, my idle will wander and fluctuate approx 200 rpm up and down the range. A little throttle and the problem goes away.
The main issue: On three separate occasions over a 2 month period, my truck died for no discernable reason.
1st time, 2 months ago: Rolling with light throttle, approx 15 mph and I saw the CEL illuminate then the truck died. I started it immediately and it drove just fine thereafter. No CEL and no codes after jumping the diag port.
2nd and 3rd time happened consecutively today. After about a 20 minute drive, I pulled over and was idling. I saw the CEL illuminate and then the truck died. I started it back up and it died again. After looking around the engine bay pretending to know what the hell I was looking at, I started the truck and it drove fine for the rest of the entire day.
When I turn the ignition to "on" I have the CEL. I installed new fusible links about a month ago as PM.
After getting home, I jumped the diag port and got 31 "Volume Air Flow Signal". I checked the FSM and did basic ohm outs on the VAF and all checked within limits. After reinstalling the VAF harness, I checked the diag port again and this time I have a 31 and a 24 "Air intake temp sensor signal" fault.
Now, I never messed with my VAF except to clean it and put some dielectric grease on the connection. I never messed with screws or anything of that sort.
Aside from the diag port telling me I have codes 24 and 31, my truck drives fine and the CEL is not illuminated at all.
My truck has a new fuel filter, the main engine harness was inspected and gtg, EGR is disabled, all new plugs, wires, distributor, timed to 3*.
Finally, aside from checking for continuity, and removing and reinstalling the EFI fuse, what else can I do? I've searched through the archives and maybe my google-fu sucks so I'm looking for any assistance you can provide.
Cheers,
Pell
Here's the background: My truck is running pretty great. Solid idle and acceleration, no hesitation. This may or may not be related to the main issue but on very few occasions, my idle will wander and fluctuate approx 200 rpm up and down the range. A little throttle and the problem goes away.
The main issue: On three separate occasions over a 2 month period, my truck died for no discernable reason.
1st time, 2 months ago: Rolling with light throttle, approx 15 mph and I saw the CEL illuminate then the truck died. I started it immediately and it drove just fine thereafter. No CEL and no codes after jumping the diag port.
2nd and 3rd time happened consecutively today. After about a 20 minute drive, I pulled over and was idling. I saw the CEL illuminate and then the truck died. I started it back up and it died again. After looking around the engine bay pretending to know what the hell I was looking at, I started the truck and it drove fine for the rest of the entire day.
When I turn the ignition to "on" I have the CEL. I installed new fusible links about a month ago as PM.
After getting home, I jumped the diag port and got 31 "Volume Air Flow Signal". I checked the FSM and did basic ohm outs on the VAF and all checked within limits. After reinstalling the VAF harness, I checked the diag port again and this time I have a 31 and a 24 "Air intake temp sensor signal" fault.
Now, I never messed with my VAF except to clean it and put some dielectric grease on the connection. I never messed with screws or anything of that sort.
Aside from the diag port telling me I have codes 24 and 31, my truck drives fine and the CEL is not illuminated at all.
My truck has a new fuel filter, the main engine harness was inspected and gtg, EGR is disabled, all new plugs, wires, distributor, timed to 3*.
Finally, aside from checking for continuity, and removing and reinstalling the EFI fuse, what else can I do? I've searched through the archives and maybe my google-fu sucks so I'm looking for any assistance you can provide.
Cheers,
Pell
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