Guest jon-fernbrook@ll.net Posted March 31, 2008 Share Posted March 31, 2008 Have a 78 280z that has been a hard starter after being run. I have been told that this is a fuel issue, in that, because the fuel now days has so many additives, it is boiling in the fuel line and needs some time to cool. This has been confirmed as the problem. I have also been told that there once was an 'injector fuel line fan cooling kit' that was available to deal with this, but I cannot find one. Anyone have an alternative, creative solution??? Its almost spring and I want to drive my Z! Help. Thanks for any possible solutions no matter how wacky. Quote Link to comment Share on other sites More sharing options...
jasper Posted March 31, 2008 Share Posted March 31, 2008 How did you CONFIRM this? Quote Link to comment Share on other sites More sharing options...
rztmartini Posted April 2, 2008 Share Posted April 2, 2008 is it carb or FI? electric or mechanical pump? if its electric you could wire in a relay to switch the pump on manually before you start it to prime the fuel rail with cooler gas from the tank. if you have a mechanical pump then you might have to look into heat-shielding to stop the issue altogether... ...if that is really what is going on. Quote Link to comment Share on other sites More sharing options...
m4xwellmurd3r Posted April 2, 2008 Share Posted April 2, 2008 I really don't think that your car is suffering vapor lock. I live in arizona, and even after a hot day and an overheated engine, my engine cranks fine. Fuel injected systems run under too high of pressure for vapor lock. how did you "confirm" that the fuel is boiling in the lines? it could be something else, like a finicky sensor somewhere. Quote Link to comment Share on other sites More sharing options...
Gollum Posted April 2, 2008 Share Posted April 2, 2008 The "injector fuel line fan cooling kit" you're talking about can be found on nearly any 280ZX in a junkyard. Very easy to find. I have two spares if you want them... I don't like them. They're ugly and don't do much good anyways. I'm not certain at all on this, but I think nissan added it to help heat soak after turning the engine off. With the intake right above the exhaust the fuel lines would get quite hot. I never noticed issues on any NA engine removing it, turbo maybe, but that's maybe. If this is the issue the car should still be easily drivable. Just will take a few extra cranks of the ignition to get going. Injectors will still sray fumes just as well as liquid... I'd suspect it to be a sensor more than anything else. Quote Link to comment Share on other sites More sharing options...
Administrators BRAAP Posted April 2, 2008 Administrators Share Posted April 2, 2008 If this is an EFI car, clogged fuel filter, fuel pump, NOT vapor lock! If you are certain it is indeed vapor lock and you ahve EFI, please give a very detailed description of how and why you came to that confirmation. Oh, and more than half the time you think it is fuel related, it ends up being ignition related, so do NOT rule out ignition issues such as dying coil, bad plug wires, etc. Quote Link to comment Share on other sites More sharing options...
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