280zx idle problems , help!!!!!

[Guest Anonymous]

well i just got my 280zx back from the interior guy , and it hasnt been driven in 3 months. i screwed the idle screw tight and still wont go above 750-850 rpms , and then about 20 sec later quits. then when i got it home i , replaced plugs , fuel lines(thinking maybe there was a leak) i found some undone vaccum lines and replaced them w /new ones and put them in the proper places ,plug wires , distributor cap , fuel filter and im starting to freak beacuse now it wont even start!!!!!! it will turn over and want to start but it wont and sometimes it will start and then quit after 2 seconds. if i try to give it throttle it quits!! this is a big problem beacuse im supposed to sell this car in a few days!!!!! any suggestion / help is welcomed pleeeezzzeeee help!!!!!

[GabeRoc]

i have had a similar problem with my 81 n/a. it sat for about a month and a half while i rebuild the transmission and when i got the tranny back, it ran rough, dieing at idle after about 20 seconds, and over a period of about 2 days stopped running at all. my problem was that my fuel presure regulator was FUBAR. that's the only suggestion i can offer, hope it helps.

 

gabe

[Guest zpeedracer25]

I suggest keep looking for vacuum leaks after the AFM. It sounds like you're getting unregistered air into the engine after the AFM...if so, its a big leak. Make sure there isn't a big crack in your air boot to the throttle body, broken pcv valve hose, broken hose from the cylinder head vent, loose oil cap, or possibly leaky intake. It is also possible that you have a bad AFM or connection at the AFM, but that is less likely.