Question about Nissan Z

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Datsun/Nissan 1978 280Z 2 2 6-Cyl in-line: Car will not re-start if parked after ashort run of a fewe miles, for about 30 minutes. Starts and runs fine from cold (first start) Cranks over fine. If hood is left open, it may re-start sooner, but engine sputters and spits for a short while, then smooths out.. Possible: Ignition Coil failing when heated up? OR is mixture too rich for hot engine? (Fuel Injected engine)?after a run of a few miles. Engine coolant temp 185-190 degrees.

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  • chevyhead2 Oct 30, 2008

    I have close to the same problem, but once the motor is hot it is like the battery is dead when I try to restart it. The starter barely turns. If I try to bump the started by briefly turning the key, it may fire up after repeated attempts. This sucks when you stall it in traffic and it won't even turn over. Once it starts it runs fine. Any ideas where to focus?

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Check the condition of the fuel pump relay. It is located under the bracket in front of the battery that has the fuseable links attached to it. You will have to take the fuseable link holders off and remove the 2 bolts on top and the 2 on the bottom that hold the bracket to the inner fender. You will also have to take the fusable link holders off the side of the bracket cover that is next to the battery. Once you have done all that you can pull the bracket back, remove the 3 screws that hold the plastic cover on the battery side of the bracket and remove the plastic cover. Now you can unplug the connectors from the 4 relays located inside the bracket and pull the bracket with the relays inside out of the car so you can take it to the work bench. Two of the relays are the same relays. One is the ignition relay that sets between 2 other relays. The other relay by itself next to the big fuel pump control relay id the fuel pump relay. If your fuel pump goes bad and draws too much current it will burn the contacts on the fule pump relay. You can uncrimp the relay housing and pull the cover off. If the contacts are burned black you found the problem. The pump caused the relay to go bad so they both need to be replaced. If you have allready replaced the pump you are halfway to getting your 1978 280Z coupe running again. If the relay plastic base is not melted and the coil winding are not burnt black you can sand down the silver relay contacts and recondition the relay but I would prefer to replace it. Allen Bishop, at co60bishop@aol.com.

Posted on Oct 17, 2008

Make sure your water temperature sensor is operating properly. Might as well replace that first and see.

Posted on Aug 23, 2008

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