75' 280z wont start - Help Me !! - Classic Z Car Club Skip to content

75' 280z wont start

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well i was driving my z it was running good and then i stopped it for my family christmas party after the party i go back out to leave and try to turn it on and it wont start... it turns over but no go. i have spark most absolutely in every plug and i have this compression 120,130,130,130,130,90... so im thinking the fuel must be the problem cuz its been running good...so i tried jumping it and stuff and then went out the next morning to try stuff and my buddy helped me look at it and we found the intake just totally flooded, there was gas in my air filter...so i dunno im thinking the FI works but maybe the valves arent opening or something anyway if anyone has had a similar problem or any ideas id much appreciate it. late.

First pull all the plugs back out, pull off the air filter and or intake pipe to let the gas dry out. Disarm your ignition so that it WILL NOT FIRE (pull power lead to the coil). Crank engine over. WITH THE PLUGS OUT! Did any gas come shooting out? Let everything dry out real nice like. Clean up your plugs. Check out your AirFlow meter to make sure it's not got any visable damage. If it is also full of fuel residue Carefully pull out of intake track and allow to dry. Reassemble. Crank over, do not pump gas pedal. What happened? :devious:

  • 2 weeks later...
  • Author

sorry its been awhile since i posted but ive come to the conclusion of fuel pump failure LOL i feel dumb youd think not hearing that lil clicking noise when the key is on the "on" position would have set that alarm off but no no it didnt...ill have to take it out and see but im sure thats the problem

  • Author

aight hi thanks for the input again found out my fuel pump is fine ive got 50psi in my lines anyways fuel gets to the injectors but they dont seem to fire any ideas? thanks late.

there's a fuse link for the e.f.i system. Make sure the wires are connected to the injectors. Otherwise, it's something simple, but probablt in there where you can't get at it.

Can you remove an injector and see if it sprays when you crank the engine (coil wire off)? Maybe check all 6 injectors, but it could run with only 1.

  • 2 weeks later...
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  • Author

well im done messing with this thing i have no clue what the prob is and i dont have a wiring guide or the manual to look at other optionds so to the dealer it goes thanks for your input everyone but ill leave this to the "pros" late.

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