I HAVE A 1986 300ZX NON TURBO. IT CRANKS BUT APPEARS TO BE A FUEL ISSUE. HOW AND WHAT SHUD I CHECK TO SEE IF IT IS INJECTOR/FILTER OR PUMP PROBLEM.
First I would go ahead and change your fuel filter, I change mine every 50k miles. "Home remedy working with what you have" assuming the fuse and relay are good. Unplug the main wire from the main coil to keep the car from starting as we test the fuel pump and the pressure making sure is working properly. To check and see if you getting any fuel, One way is, under the hood locate the fuel filter, disconect the fuel line from your fuel filter, cover the end of the fuel line with a clothes over the hose and have a friend turn the ignition over couple of times and see if any fuel coming out of the line. Make sure you point the fuel line downward away from your face just in case, otherwise it will squirt and shoot fuel over you. Make sure you also have your finger over top of the hose so you can feel the pressure from the fuel pump. If it weak pressure replace the pump, keep in mine, its 1986 and that is an old fuel pump with high miles. Being 1986 Z car, I would say its the crank sensor is bad although it dont believe it has one but everything is built into the distibutor unit. If you getting good pressure than it could be your fuel regulator and no way of testing it, there are also cheap to replace or your fuel injectors is bad again all injectors cant go bad at the same time unless the car has been sitting in the storage for years. If one goes bad, its best to replace them all. I can see one or two injectors goes bad but your engine should still be running but run rough like missing firing. Every 3 to 4 month with my fill up I always use a can of fuel injectors cleaners add to my gas tank to keep problems free. I have 320k miles car and still have the original injectors although I filled and use 93 octane once a month just to keep everything running smooth. If you get a chance go to a junk yard a pull out couple of relays and see if that will do the trick, don't buy a new one, its stupidly expensive for a relay. If you doing your own repair I recommend you purchase Haynes auto repair book, great tools to have and instructions with pictures. keep me up to date and I will try to help as much as I can.... good luck.
Aug 21, 2009 |
1986 Nissan 300ZX