Is my walbro dying?
Mar 11, 2006, 12:21 PM
#1
Is my walbro dying?
The pump is operating in the high flow mode at low to mid throttle instead of only WOT like it used to. This is confirmed by listening with seat out and panel off like I did for a check after I installed it 1 year ago. My ears aren't lying it's high flow, not to mention the 13vdc read with jumpers on the pump connecter. But it only does this intermittently
What is going on? The car has only operated in "high" at WOT, but now this.
Another thing occurred: at 7000+rpm, 21 psi, in 2nd gear the engine faded - like was slowly running out of gas - but tank was full and I was going straight. No SES light car runs good, compression ck same, any clues?
What is going on? The car has only operated in "high" at WOT, but now this.
Another thing occurred: at 7000+rpm, 21 psi, in 2nd gear the engine faded - like was slowly running out of gas - but tank was full and I was going straight. No SES light car runs good, compression ck same, any clues?
Mar 14, 2006, 09:33 PM
#3
I removed the fuel psi solenoid, cleaned out a little oil in connector and on solenoid. Bench checked it with battery and a hose. Put it on, and for some reason pump has been working normal for a hour so far (was 15 min). Fingers crossed.
Mar 14, 2006, 09:41 PM
#4
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to test fuel pump...you test fuel pressure and volume......to know if a fuel pump is putting out enough fuel, test the fuel flow. use a vacuum hose and hook it to the end of the fuel rail. let it idle. if it flows more than half of a 20oz bottle (10oz) in 15 seconds, then the fuel pump is good
Mar 15, 2006, 05:51 AM
#5
Originally Posted by dashiet
to test fuel pump...you test fuel pressure and volume......to know if a fuel pump is putting out enough fuel, test the fuel flow. use a vacuum hose and hook it to the end of the fuel rail. let it idle. if it flows more than half of a 20oz bottle (10oz) in 15 seconds, then the fuel pump is good
I definately need to monitor fuel pressure on the rail, so many things in the system effect it or can malfunction, even without the ECU detection.
Mar 15, 2006, 08:45 AM
#6
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Walbro
Mine started doing the exact same thing. My car is running fine as well. People I talked to said not to worry about it, that it was normal. They said it happens when you get stuck in traffic a lot or you rag on the car, or it is plain hot outside. I am going to clean the electrical connections to make sure everything is alright and see if that makes a difference. Good luck and keep us posted if you find a cause.
Sigfrid
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Mar 15, 2006, 08:53 AM
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Originally Posted by ruzs
Mine started doing the exact same thing. My car is running fine as well. People I talked to said not to worry about it, that it was normal. They said it happens when you get stuck in traffic a lot or you rag on the car, or it is plain hot outside.
I'm on my 2nd Walbro 255 fuel pump. First one started whining non-stop last summer in 95+ F deg. heat in a 2.5 hour rush hour traffic jam. It continued to whine after that even the next day on a short trip. I swapped in the stocker- fixed.. no problems.. Swapped in a 2nd Walbro and so far I've not been able to reproduce the non-stop whine. However, this was over winter.. spring/summer is on it's way.
-nixx
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Mar 15, 2006, 09:51 AM
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Walbro
They are not dead. They just make more noise at some point. I cannot return to the stock pump with the mods I have, so I am particularly interested in this issue. If it does not affect performance, I could not care less about the noise. If it is dangerous, I'm all ears.
Sigfrid
Sigfrid
