1986 Nissan Truck Repair Question
1986 Nissan 720 Running rich
what about a bad fuel pressure regulator? ruptured diaphram would would suck extra gas into intake.
where is that located? And is that something i can change in my driveway?
and is there a way to check it to see if it is bad before i go out and buy one?
Such vacuum switches can be tested. It is in fact a solenoid and if 0.00 ohms, it indicates the switch is shorted internally. Try applying battery voltage to the wire while grounding it. Note if there is a clicking noise and test with a vacuum hose to see if vacuum passes through.
Our database does not show anything about the 2 switches and from what I see, they should be attached to something else with another hose leading out.
Does the rich running condition occurs only during low engine speed or at all ranges?
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oops! its only an 86, does it even have a VACUUM pressure regulator? is it an electric fuel pump?
Yes it is an electric fuel pump. And those switches only have one vacuum port, but they connect to two different electrical connectors. Im not sure where the connectors lead to, I havent dug that deep into it yet.
and it runs rich through all ranges. More so at the hi end though.
what we really need to know is the carburetors guts, how they function. where is the return line to tank located? is it on the carb?
did you rebuild carb? what about wrong float setting?
looks like same carb since 83. and it does have a mixture solenoid cause ya get 1 in the kit!