Hard Start When Cold
So, I have an 85 Z31 N/A that has a difficult time starting when cold. If I let the fuel pump prime a few times before starting or use starting fluid she will fire right up. She will also stay running and restart without any issue for the rest of the day. I have installed a new fuel pump, and FPR, checked the fuel pressure, spark, vacuum, and the ECU is clear. Everything seems to check out as per the FSM. The only strange thing I see is the FSM has 2 different configurations for the FPR fuel hose routing, one for turbo and the other for N/A. I have an N/A that appears to be routed like a turbo. Any input would be greatly appreciated. Thanks
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Welcome to ZDriver! So when you check fuel pressure, what's it at? Did you do a leak down test?
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Originally Posted by deonw1
(Post 346984)
So, I have an 85 Z31 N/A that has a difficult time starting when cold. If I let the fuel pump prime a few times before starting or use starting fluid she will fire right up. She will also stay running and restart without any issue for the rest of the day. I have installed a new fuel pump, and FPR, checked the fuel pressure, spark, vacuum, and the ECU is clear. Everything seems to check out as per the FSM. The only strange thing I see is the FSM has 2 different configurations for the FPR fuel hose routing, one for turbo and the other for N/A. I have an N/A that appears to be routed like a turbo. Any input would be greatly appreciated. Thanks
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Originally Posted by NismoPick
(Post 346992)
Welcome to ZDriver! So when you check fuel pressure, what's it at? Did you do a leak down test?
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Originally Posted by 87moonglow
(Post 346994)
Hey everyone, and to op, sorry this is diff from what u guys are talking about but have u changed the thermostat or is it even still there?
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Originally Posted by deonw1
(Post 346996)
No , I haven't changed the thermostat, yes it is still there and working as far as I can tell. So what's your theory?
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