Oldtowntrucks
Registered User
Hi there, noobie here so go easy 
Read thru the offical oil burners TPS adjustment post (https://www.oilburners.net/threads/whats-a-fipl.4134/) as well as many many other forums online to no avail.
Post says wire A is reference, B is ground & C is the throttle signal with idle position hopefully around 1.2volts, 4.5 for WOT.
Here's the thing for my old 1993 F250 7.3 IDI e40d I've been trying to chase: The middle wire B, at idle position, reads no lower than 4 volts. My local shop did some work which ended up some of it being a new TPS (they set it up wrong anyway), but every post I see says wire C is supposed to be the reference wire. Brand new E40d with less than 2k kms on it. Wondering if down the line when another older shop replaced the harness, they might have accidentally swapped wires & messed it up? I can't get my old girl to go below 4v idle (when I tested it after the shop, it was 10v!! ***! they didn't know what they were doing!)
Ground wire is fine. The truck shifts sorta fine, but still occasionally upshifts waaaay too low of speed/rpms, leading me to believe my TPS is still out of adjustment. New cam sensor, VSS and MLPS. PSOM is fine.
Hope that makes sense, thanks!
Read thru the offical oil burners TPS adjustment post (https://www.oilburners.net/threads/whats-a-fipl.4134/) as well as many many other forums online to no avail.
Post says wire A is reference, B is ground & C is the throttle signal with idle position hopefully around 1.2volts, 4.5 for WOT.
Here's the thing for my old 1993 F250 7.3 IDI e40d I've been trying to chase: The middle wire B, at idle position, reads no lower than 4 volts. My local shop did some work which ended up some of it being a new TPS (they set it up wrong anyway), but every post I see says wire C is supposed to be the reference wire. Brand new E40d with less than 2k kms on it. Wondering if down the line when another older shop replaced the harness, they might have accidentally swapped wires & messed it up? I can't get my old girl to go below 4v idle (when I tested it after the shop, it was 10v!! ***! they didn't know what they were doing!)
Ground wire is fine. The truck shifts sorta fine, but still occasionally upshifts waaaay too low of speed/rpms, leading me to believe my TPS is still out of adjustment. New cam sensor, VSS and MLPS. PSOM is fine.
Hope that makes sense, thanks!
