Questions & Answers for: Jeep causes fuel gauge malfunction

...fuel gauge activilty when the key is turned on & no ALDL connection with a scanner plugged in. I get a "err" on the scanner. All fuses are good & I believe all relays to be good, I checked the pin ...

causes the lights to flash. I'd say the security system has malfunctioned, causing the lights to stay on. You will more than likely have to replace the ecm (control module) for the alarm system. check

fuel pressure gauge so as to ascertain that fuel pressure at the manifold is at least 41 psi and holding steady. (AutoZone will loan you one -- FREE). The fuel pressure regulator may also be defective

...causes ---engine mechanical fault ---wiring----ignition/ fuel system--- injector---ECT/MAF sensor---ECM I am thinking here that it restarts , not after cooling , but after the vacuum in the fuel tank ...

...fuel or engine temperature gauge working I would rule out any one sensor as the problem.All this info comes from the ECM/PCM - engine computer over a serial data network. one or two wires. ...