ttodhunter Posted December 10, 2010 Share Posted December 10, 2010 So I finally got my Z running for the first time, but only for about 3 seconds. The good news is it runs smooooth, the bad is that it loses fuel. When it dies, I can't hear the fuel pump when trying to start it. If I disconnect the starter solenoid and hit the starter, sometimes I hear the fuel pump pumping, sometimes I don't- but when I hear it pump, it builds up enough pressure to run it for that 3 seconds. I've cleaned and brushed the terminals on the fuel pump, they're good. The wires coming off the pump look good too. Is this a fuel pump relay issue? I know that once you release the key from start, the airflow through the AFM triggers the pump, but after it dies it won't start again... The fuel pump isn't getting a signal from either the "start" position or the AFM, sometimes... Quote Link to comment Share on other sites More sharing options...
jhill Posted December 10, 2010 Share Posted December 10, 2010 If you hold the fuel pump relay and turn the key on you should feel it click meaning its working correctly.. Also if you have a bad afm (like I did when I was trying to get my z started) the car won't start and will act pretty much the way your explaining your car is. You can test the afm if you have the manual and a volt meter. Quote Link to comment Share on other sites More sharing options...
sticky280zx Posted December 10, 2010 Share Posted December 10, 2010 ive got a few afm's if yours proves to be bad, just let me know (ive got 5 or so all different years that i know are good) Quote Link to comment Share on other sites More sharing options...
ttodhunter Posted December 11, 2010 Author Share Posted December 11, 2010 Ok, I've found the problem and it is in the AFM, but it confuses me. When I reached in and poked the flap, the pump turns on. But the problem is still there. Sooo, I primed the rails with fuel and hit the starter, fired right up, then ran to the AFM and jammed my finger in there and shonuff, it idles perfectly. I guess the flap isn't opening enough to trigger the pump... Can this be fixed with an adjustment or do I need another AFM? The AFM in there does have a "remanufactured" sticker on it. Quote Link to comment Share on other sites More sharing options...
ttodhunter Posted December 16, 2010 Author Share Posted December 16, 2010 I found a massive tear in the intake boot behind the AFM. Using leftover JB weld, I filled it in. Now it idles (at 1800 RPM). On to the next challenge... Quote Link to comment Share on other sites More sharing options...
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