Jump to content
SAU Community

Recommended Posts

The last couple of days have been really hot 30deg +.. And I have noticed my 040 intank pump is a noisier than usual. It is like it is cavitating or the pump is out of the fuel constantly.. Quite loud.. Before the last couple of day I could barely hear it. I also have a inline fuel pressure guage on the pump side. What I noticed is the guage oscillating +- .1 psi .. To my it seems like the fuel is like froth from all the heat and driving around. It is the only thing that make sense to me.. It also makes my idle real bad :D

Anyone has any ideas? am I right by the froth idea? if so how to stop it.

Link to comment
https://www.sau.com.au/forums/topic/99654-noisy-bosch-040-pump/
Share on other sites

I have a 910 external.

Mine used to be so noisy it would vibrate the floor pan even though it was rubber mounted. Upon feeling the out fuel hose it was vibrating so much it made my hand feel slightly numb.

I ran a dedicated feed from the battery via a relay to the pump.

It is still noisy but can no longer be felt or heard inside the car.

tank was 1/4 full...

Busky2k: you find the pump noisy on hot days only? usually I can't hear it..

Driver: brand new pump.

I took the pump out bench tested it.. I noticed the pump to be really quite..mm strange.. The only time I could get the pump to be noisey was when it was starving for fuel. To do this I stood the 040 upright with the suck side on the floor - then it was noisy.. Which was making the same sound could I could hear in cabin..

the pump is high enough from the bottom of the tank. So the only thing I could think of is maybe pressure is not being release from the tank properly on hot days and the pump is struggling to pump the fuel out..

any ideas?

hmm I'm starting to hear mine too. I have a Bosch 040 internal and you can hear it when acc is turned on, briefly before the engine is started. I could barely hear it when idling standing next to the car. The past couple of days has been hot and I can start to hear the pump alot more. I'm not really worried about it but I'll keep an eye out for any updates on this topic.

Nath

I found the problem... Crap in the fuel.. It is my worst nightmare going back into the tank - headaches and start seeing stuff :D ..

I took the pump out and noticed heaps of black crap on the filter.. I cleaned it up and it was soundless for 20 ks of driving.. So I used the old pump without a filter and draind and put back the fuel with the 040, 7 times - until no crap was found in the fuel. It seems to be ok now.

When I installed the 040 I also used the original filter and when I took the 040 pump out of the tank I found the black stuff stuck in the 040 filter - it was getting through the original filter. So the 040 filter is finer than the old filter thus picking up more crap before the filter in the engine bay..

I think maybe I got a bad batch or the heat has cleaned the tank off and left floaties..

argh! I just flushed the tank 7 times - shake the car take fuel out and filter the fuel back in. After 40 ks and a top up of fuel the pump is noisy again :P .... I think the petrol station down the road has bad fuel..

I dont think I can take the take out as it looks crammed under the diff..

Oh well another flush tomorrow..

what am I doing posting! I should be drunk!!!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • The nature of my commute has changed. Way back then it was traffic lights all the way, for ~28km. It sucked. When they finally stitched the expressway together I can do a good 15+km of it at a steady 80-100 with no stopping. That alone has gotten me down to flat 10s. Prior to that it was mid-high 10s. I can't remember the delta that I saw when I got the idle down. It was only ~150 rpm, because the idle speed was never terrible, but for the delta in consumption to be noticeable it would have had to have been at least 0.2-0.3 L/100km - which is not to be sneezed at when it comes for absolute free.
    • If you're claiming the issues are not skyline specific, then either the USA is living in the 90s / early 2000s, OR you have the issue of "survivor bias". Which is you're mainly hearing and listening to those with terrible experiences, and haven't found the guys who have cars with good decent builds and no problems. It happens in AU too, that plenty of people keep having issues, and they keep going to the workshops that are known to be shit "because I read on the internet". Even worse, are those who keep posting on the internet as though they know for a fact what something is, when they've never touched/looked at said item in their life, and again are making assumptions, based on something they read, or because it's a certain way in other cars. It's even funnier when those same people debate the facts with the people who've lived and breathed this stuff for over 15 years. Example, I've had someone tell me you can't do something with a Skyline, because they read it on the internet, except I can tell they're wrong, as I did that exact thing back in 2008 with my Skyline.
    • The funniest part I saw, was someone would bitch and moan on FB about something, Andy would be the one to respond, asking for more info, if he could contact them, what the engine setup is, what their config file was, and 95% of the responses were people just going "der! It doesn't work" and Andy going "What doesn't work?" And then going "The firmware!" And they'd go around in circles as no one could ever give information, and Haltech couldn't fault things on the bench, (especially when people wouldn't give any specifics).   Many moons ago, when Andy was back at e420c stage, he reached out to me, and asked me to test different plug and play looms for him (already had an e420c in the car on his V1 PNP loom). And he kept asking me, as I was competent enough to be able to give him some specific feedback on what was/wasn't working, how to replicate the faults etc, and work through things with him. Most people are terrible at answering the questions they're asked, or being able to provide quality feedback other than "it doesn't work".
    • I say it often, none of this stuff is really Skyline-specific per se. But in general there's not a lot of people who actually know what they're doing. A lot of people charging like they do. Agile software development probably isn't the greatest idea for an engine controller.
    • Incidentally, I also put v3 of the tune on the car and did an oil change from 5w20 to 5w40 to see how it affected oil pressure in the mid to high end. I'm still happier with the thicker oil and will stick with it, but clearly the system is happy with 55psi even if I'm not! It's well within the service manual specs...but they are very open
×
×
  • Create New...