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G4me
Veteran
Date registered: Jan 2012
Location: Honolulu, HI
Vehicle(s): 2002 G500, FJZ80 LandCruiser
Posts: 114
| Crank Position Sensor???
Guys,
It has been awhile since I have been on the forum as my 2002 G500 has been running well. Last night while driving home I had the loss of power and was able to get my vehicle into a parking area on the side of the road. As I pulled in it died. It would not restart. It would crank and catch for 1/10 of a second and then die. This had happened to me once before in May of 2020 at 104K. Last time after a 20 minute cool down the truck restarted and I was able to drive it home. I replaced the OEM CPS with the Bosch unit.
I thought it was the CPS again this time so I let it cool for 20 -30 mins to the point I could touch the exhaust. Still would crank but not run. So not classic CPS. Truck was towed to the house, sat over night and starts/runs just fine. Classic CPS? The thing that concerns me is the CPS has only been installed for 4 years and 24K miles. Seems early for a failure. No CEL or malfunctions on dash and no codes when checked with a generic OBDII reader. Which suggests CPS or it was just a fluke electrical interruption. Is there a way to check the CPS (ohms or ?) to confirm that it is going bad?
I have a spare one that I can install but it leaves me suspect to take it very far from home. Others things I should be checking?
Thanks
Dave
G4Me |
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mb230s
Date registered: Apr 2006
Location: SWFL
Vehicle(s): G-less for now, vintage MBs, FJ40
| Re: Crank Position Sensor???
Fuel pump? If it happens again check the fuel pressure at the rail via the schrader valve. |
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G4me
Veteran
Date registered: Jan 2012
Location: Honolulu, HI
Vehicle(s): 2002 G500, FJZ80 LandCruiser
Posts: 114
| RE: Crank Position Sensor???
I thought about the fuel pump but I can hear it run on start up. I thought it would be all or nothing with the fuel pump? |
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W5YK
Extreme Veteran
Date registered: May 2006
Location: San Diego
Vehicle(s): 2002 G500, Unimog U2450,
Posts: 545
| RE: Crank Position Sensor???
Re: Fuel pump being all or nothing:
On my 2002 G500 , the fuel strainer in the tank got clogged. The car would start but not run. Sometimes if it sat for a while it would run for a bit. The pressure looked normal out of the fuel pump, so I dismissed fuel supply as the problem and wasted a week or two looking at injectors, spark plugs, coils, leads,MAF, CPS etc etc. Eventually went back to fuel and found the supply rate was way too low (by letting it pump into a bucket). Replaced the inline filter, no change. That's how I found out there was a strainer in the tank. |
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