1994 Infiniti Q45



January, 20, 2010 AT 11:08 PM

1994 Infiniti Q45 V8 Two Wheel Drive Automatic 154000 miles

car starts and runs for around 10 to 15 miles and shuts off. Will wait a few minutes and restart car will run for another 10 to 15 miles, have changed computer to no avail.

1 Answer



January, 20, 2010 AT 11:29 PM

Next time it happens do not wait for nothing, do below immediately to determine if it's a fuel or spark problem.

Get a starting fluid/ether/better off gas in a spray bottle and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 in away from ground have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor /distributor pick-up coil, ignition control module, ECM, Ignitor camshaft and crankshaft sensors- Note: If it doesn't apply disregard it

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