1994 Infiniti Q45 Repair Question
1994 Infiniti Q45 shuts off while driving,wait and restart
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.
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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