[1985 Jeep CJ7 Fuel Gauge Reads Inaccurately]

Moses, that is an excellent diagram. Thank you!

[1985 Jeep CJ7 Fuel Gauge Reads Inaccurately]

Moses, I am finally about to make some time to swap this sending unit, but was advised there are some check valves and a filter I should do at the same time? I found a filter for this OEM 20 gallon plastic tank, but I can't find any info on any check valves? Are they in or near the old charcoal canister or are they in or near the fuel tank?

 

[1985 Jeep CJ7 Fuel Gauge Reads Inaccurately]

Moses, after doing some of the tests, improving some grounds and retesting, it appears I have the wrong sending unit. I just ordered the Crown one for my OEM plastic 20 gallon tank. I’ll keep you posted. Thanks!

[1985 Jeep CJ7 Fuel Gauge Reads Inaccurately]

Thanks, Moses. I was thinking the previous owner had put a standard 15 gal sending unit/arm/float in the tank years ago (even though this Jeep has a 20 gallon tank), but I did not want to influence your answer, so I appreciate the detailed response with different things to check before I just drop the tank and replace a sending unit that I might not have to. That said, after checking everything, if I do need one, I have not heard great things out there about any of the CJ-7 sending units, much less the 20 gallon type. Any suggestions on where I could get an accurate one that is made well? Thanks, Howard

[1985 Jeep CJ7 Fuel Gauge Reads Inaccurately]

I have a 1985 Jeep Laredo with the 20 gallon plastic tank. After a fill up, my dash gas gauge in the speedo reads WAY full and when driving around, it takes forever to move the needle--after I have driven around for the week, it starts to drop, but then faster than normal. When the gas gauge reaches 1/4 tank, the Jeep is empty and out of gas. For years, i have just filled it up before I get to a 1/4 tank, but my 15 year old boy is going to be driving it soon, so I want to fix it. Any ideas?