RJMorrow
Registered User
I have a '95 F-250 7.3L which has become increasingly hard to start. This is a problem in any weather less than 60 degrees. I have checked my GP resistance and all are good, also verified GP relay operation. The truck does have a block heater which i replaced the cord end on and tried but did not really help (verified block heater element resistance, ok).
I am still learning about these diesels, but i suspect i am not acheiving the necessary RPMs to start. In addition, i only get about 15-20 seconds of crank time before batterys give out. I have replaced one battery so far and i load tested the remaining battery and it appeared ok. The truck runs fine once started and will start with a booster/charger assistance. At this point there are 298,000 miles on the truck and I do not have extensive service history from previous owner.
Both batterys read good voltage after sitting idle for several days.
My suspicions are bad starter/battery cables or a bad starter. Does anyone have a ballpark figure for starter current draw during starting?
Or any suggestions on where to look next ?
Is there a neccesary RPM that must be achieved in order to start?
Thanks,
RJM
I am still learning about these diesels, but i suspect i am not acheiving the necessary RPMs to start. In addition, i only get about 15-20 seconds of crank time before batterys give out. I have replaced one battery so far and i load tested the remaining battery and it appeared ok. The truck runs fine once started and will start with a booster/charger assistance. At this point there are 298,000 miles on the truck and I do not have extensive service history from previous owner.
Both batterys read good voltage after sitting idle for several days.
My suspicions are bad starter/battery cables or a bad starter. Does anyone have a ballpark figure for starter current draw during starting?
Or any suggestions on where to look next ?
Is there a neccesary RPM that must be achieved in order to start?
Thanks,
RJM