86 300zx 2+2 problem

From here, sounds like an air flow meter problem.. It's very doubtful it's something like a fuel pump or filter etc.

Unplug the Air Flow meter and see if it runs better. If so, it is the AFM. About $250 refurb if you do it yourself

Yep, I replaced the Mass air flow and it's running perfect again. Rebuilt from Kragen for 185.00 bucks. Takes about 20 minutes to do. Thanks for your help.

One more thing, check the AIV valve and make SURE it isn't dumping exaust gas in front of the meter or it will shortly kill another one.

Hmm, Glad I checked back here Steve, thanks. OK could you please point me to where that would be located and what do I check for if you don't mind me asking sir. AIV ? air injection valve ?? Thanks again Steve

It's the silver box next to the ignition coil with hoses going to it. One big hose goes to the exhaust, the other goes to the boot just in front of the MAS. It has a vacuum diaphragm on top of it with a small hose. Take the two screws out of the bracket holding the diaphragm onto the silver box (work them back and forth with some lube, they corrode and break easily) and look inside. If it's all black/burnt looking inside (normally the plunger is blue rubber..), the reed valves in it are toast and are letting exhaust go backwards through the valve, up the hose and through the MAS killing them. If nothing else, "disable" the valve until you can get a replacement. It's a dealer only part as far as I know.

It's purpose it to allow air into the exhaust for emmisions (instead of having an air pump...)

Thank you Steve, I much appreciate it sir. I'll check that in just a little bit.

Anyone know a cheap source for the 88 service manual on CD or download?