Fuel pump always running
#1
Fuel pump always running
After getting all the little things worked out on my z.The fuel pump was priming for the the 5 sec period just yesterday and today it just keeps running with the key in the on position.
I checked and cleaned all connectors ect.I wired in my own fuel pump relay when i did my turbo swap(four years ago) and thought that was problem,Put a new relay in and no change.The car will start,but won't idle.It revs just fine.I have to keep my foot on the gas or the engine will stall.Keep in mind this just happend today.The car was running strong yesterday with no issues.Any ideas on what the problem maybe?
I checked and cleaned all connectors ect.I wired in my own fuel pump relay when i did my turbo swap(four years ago) and thought that was problem,Put a new relay in and no change.The car will start,but won't idle.It revs just fine.I have to keep my foot on the gas or the engine will stall.Keep in mind this just happend today.The car was running strong yesterday with no issues.Any ideas on what the problem maybe?
Last edited by mikesz; 07-15-2009 at 10:18 AM.
#2
Keep in mind that I bypassed the fuel pump controller on my turbo Z which regulates between 14v and 9v for idle. My car still idles smooth and the fuel pump runs all the time with the engine on. The lower voltage was to decrease amperage draw and noise, not to aid in running at idle. The system still primes for 5 seconds before startup, but once the engine is started, the fuel pump runs continuously.
The system should keep the proper fuel pressure regardless. I would look first to a faulty fuel pressure regulator on the fuel rail.
The system should keep the proper fuel pressure regardless. I would look first to a faulty fuel pressure regulator on the fuel rail.
#3
Keep in mind that I bypassed the fuel pump controller on my turbo Z which regulates between 14v and 9v for idle. My car still idles smooth and the fuel pump runs all the time with the engine on. The lower voltage was to decrease amperage draw and noise, not to aid in running at idle. The system still primes for 5 seconds before startup, but once the engine is started, the fuel pump runs continuously.
The system should keep the proper fuel pressure regardless. I would look first to a faulty fuel pressure regulator on the fuel rail.
The system should keep the proper fuel pressure regardless. I would look first to a faulty fuel pressure regulator on the fuel rail.
#4
Just got back from working on the z.Re-locating the boost gauge hose didn't change anything.The fuel pressure regulator seemed ok.I'm starting to think i may need a new pump.Would the fuel pump still operate even if was faulty?It seems louder then usual.
#7
Well, I put the other fpr on today and still no change.If anyone has had this problem in the past,Please let me know.I don't want to go out and buy a new fuel pump if i don't have to.
#9
I did take it for a short drive and had full power.I don't know if the pump is bad or not.I was thinking maybe the inlet screen became clogged up all of a sudden or the fuel filter needs replaced.I'll probably get a new one anyway.
#16
fuel pump running
I had the same problem with the fuel pump running. It turn out to be a bad (shorted) alternator. The alternator died a few days later. A new alternator (remanufactured not rebuilt) took care of all problems. I don't know if this will help you but it worked for me.
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