Bucket280z

My 1976 280z is only reaching 4000 rpm on every gear when i accelerate and struggles to get to 5000 & 6000 rpm on nuetral. The guy at Mike Z Shop told me it was a bad AFM and i was wondering if i should buy the afm from the z store for $169.95 with a $400 core charge or pay $250 for him to do it. Can people who had problems with their AFM please help.

hoov100

Why are you going to pay someone $250 to remove four bolts, two clamps and a plug?

And I would bet all you really need is a tune up, generally when the AFM goes out of adjustment it either doesn't run at all, runs REALLY rich or really lean. if you have a multimeter there is a section in the FSM that tells you how to check it.

Bucket280z

I know i took it off before i posted the thread it's $250 for the part basicly after i searched around.

So then what could be the cause of maxing out at 4000 rpm

ThaPimpShrimp

Hoov suggested a tune up.

Got one of these? Clicky

I suggest you buy one if you don't. Easy diagnoses of multiple things.

XenonS30

You can also download the FSM there.


For starters, check your ignition timing, check/replace distributor cap, spark plugs and wires, check the fuel system. Is it stopping because it's running too lean? Could be a lot of things.

Bucket280z

Yeah ill try the tune up cause my car had its head rebuilt and the gas tank cleaned out and it runs fine.
I bought the manuel and have read the xenon link but ima have to recheck.

ZZzzz

Have you "rebuilt" your afm yet? it takes all of 15 minutes, a screwdriver and some silicone. could save you some money. check this out-

https://www.zdriver.com/forums/240z-...our-afm-15277/

NismoPick

^^^ Excellent post young chap!

Bucket280z

Thanks man for this ima try this