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My car had an 040 installed and had ran fine for about 3 months.... then i removed it one afternoon to have a fiddle, and upon re-installation i got the mounting height a little off.

The fact that i was in a hurry to get the car back together and running, i didnt care too much that it sounded like it was sucking a bit of air. So i just made a point of keeping the fuel level pretty high (something i didnt really always do the 3-4 weeks during driving recently around Melb) :Oops:

So my question is, i think fuel pumps use the fuel to cool the bearings, so would the pump sucking air, and cavitating help cause the pump to fail.... my car appears to be doing a lot of cranking and not much firing.... :)

How tolerant are fuel pumps?

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I had one apart a couple of months ago. The actual stainless rollers that fit in the ceramic housing kept jamming, either that or it was the brushes. I'll get it so you can have a look sometime as it is just across the road.

My car had an 040 installed and had ran fine for about 3 months.... then i removed it one afternoon to have a fiddle, and upon re-installation i got the mounting height a little off.

The fact that i was in a hurry to get the car back together and running, i didnt care too much that it sounded like it was sucking a bit of air. So i just made a point of keeping the fuel level pretty high (something i didnt really always do the 3-4 weeks during driving recently around Melb) :Oops:  

So my question is, i think fuel pumps use the fuel to cool the bearings, so would the pump sucking air, and cavitating help cause the pump to fail.... my car appears to be doing a lot of cranking and not much firing....  :)  

How tolerant are fuel pumps?

Roy -

I installed a 040 in mine almost 18 months ago, and mine made that sucking air noise. I ended up re-directing the fuel return line, as it seemed with the bigger pump, it was casuing cavitation around the pump pick-up, as the fuel return line squirts right next to the pump.

I used a small piece of fuel line, and a aditional hose clamp and directed it away from the fuel pump pick-up. Problem fixed, and it stopped sucking air :)

I have also spoken to a few workshops about this, and they recommend doing similar. Mine was installed prior to a track day, and performed without any problems, and had done about 50,000km since

I'd say if the pump has sucked alot of air, it may have over heated and damaged a bush/bearing?? Might be worth a shot re-directing the return line like I did, it worked for me

Chris

Chris 32, i did that when i first installed it... it ran spot on.... and it was still there when i re-installed it in a hurry.

So the only way that may have been the problem was in my hurry to get the car back together and drive from Syd to Melb, i mounted the pump higher then previously, or i mistakingly placed the return outlet inside the baffled section of the fuel cell.... Its easy enought to check if the fuel pump has failed, just more fart a55ing about

yeah, maybe it has just plain old worn out?? All the hoses where tight?

Are you running the standard fuel pressure reg.? Maybe check the fuel pressure with a accurate gauge and see if its starting to fail

I have seen a car transformed when the pump was replaced. The faulty one was running but at idle the return fuel was almost non existent, and with a few revs just disappeared. GTR pump installed and plenty power now (but not mine which is choking on fuel unless I run almost full advance. The Bosch one he had just siezed.

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