more newbie questions
I ordered a handbook but until that comes in Iīll have to rely on you kind people to answer some basic questions.
First, what is the deal with the fuel tank gauge switch on the dash? I put gas in both tanks. When I press it one way the gauge goes to empty. When I press the gauge the other way it shows half a tank. I assume the gauge is for each tank separately and may not be working for one tank. Also Iīm ordering some parts and Iīm being asked if itīs OHC or DOHC and whether itīs a 2 or a 3 in the vin number. I left the car at a shop to be checked out and I have the vin, but which digit in the vin indicates if itīs a 2 or 3 and therefore if itīs OHC or DOHC? panza 1985 XJ6 1992 XJ40 Sovereign 1993 XJ40 Sovereign 2002 S type 4.0 2004 Lincoln LS ???? next |
Each tank has its own sending unit, and the wire from each sending unit goes thru the switch and then to the gas gauge itself. Thye gauge seems to be working so I'd say you have one faulty sending unit or a bad switch.
You have a 4.2 litre DOHC engine. There was no single OHC variant. The 8th digit in the VIN should be the engine designator. I never understood the "2" or "3" as seen in many parts listings. They only came one way. Cheers DD |
Thanks again for the help, Doug.
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Great questions, especially about the fuel tanks. I'm having the same issue.
As always, thanks for the info @Doug! |
Originally Posted by Doug
(Post 116768)
Each tank has its own sending unit, and the wire from each sending unit goes thru the switch and then to the gas gauge itself. Thye gauge seems to be working so I'd say you have one faulty sending unit or a bad switch.
You have a 4.2 litre DOHC engine. There was no single OHC variant. The 8th digit in the VIN should be the engine designator. I never understood the "2" or "3" as seen in many parts listings. They only came one way. Cheers DD |
Originally Posted by introvertimages
(Post 337496)
do I need to push the gauge switch (on the dash) to actually use fuel in that specific tank
Yup :-) Both tanks feed into a single "changeover" valve next to the spare tire. The changeover valve opens the line from one tank and closes the line from the other tank in one motion. Unused fuel from the engine is routed back to whichever tank you are using at the time. this is accomplished by two "return valves"...one in each rear wheelwell. Pushing the dashboard button operates all 3 valves at once....and also switches the fuel gauge wiring so that the gauge reads only the tank you are using at the time Cheers DD |
Excellent info...thanks for the clarity Doug!
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