Hello,

I have a strange problem with my 1974 280Z (electronic fuel injected straight 6).

Several months after I bought the car, I was driving home from work and I started to accelerate away from a stop light. The motor died, and hasn't run since.

Here are the symptoms: The car will start and idle (very roughly) at a low RPM, but as soon as you step on the gas, it dies. I thought this sounded like a fuel problem, but when I replaced the fuel filter and the fuel pump, it still didn't work.

I removed one of the fuel injectors from the engine, and pointed it into a bucket while the car idled, but it didn't squirt any gas. I can make the injector squirt by artificially hooking jumpers to it, so I know it isn't clogged. But it seems like none of the injectors are injecting, and the only thing that keeps it running is the cold-start valve.

As a last resort, I took it to the Datsun dealer, who told me it was the air-flow meter. So I got a used airflow meter from a salvage yard, and that still didn't fix it.

Do airflow meters fail very often? If so, is it possible that I got a bum meter from the junk yard?

Any thoughts? Suggestions?

 

OK, I checked the hoses and stuff behind the AFM, and everything is in good shape. Also, I took the AFM off the mount, so I could look into the opening, and when it's idling, the flapper moves... So I think the air hoses are probably ok.

Check this out though: When I squirt starter fluid/gas into the air intake, it runs perfect and you can really revv the engine.

I'm thinking it has to be either a sensor or the brain, but I'm not sure how to check them out...