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Discussion Starter · #1 ·
I have a 1970 P1800 E with 50k miles. It runs very well except for a very load whining fuel pump. Is this the sign of impending doom? I was thinking that the pump may be straining against a clogged filter. Before I start digging into this I was looking for some insights.<p>thank.
 

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Re: 1970 P1800 E. Very noisy fuel pump. (ktm_525)

Did you check the fuel pressure and flow rate?<br>A cloged filter could put a load on the pump but it could also be going because of crud in the tank, there is no screen in front of that pump.
 

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Re: 1970 P1800 E. Very noisy fuel pump. (VolvoBob)

No I haven't done anything yet. This Bosch FI scares me. Is checking flow rate/pressure easy or would I be better off getting a Volvo mechanic with some experience on the system do the diagnosis?<p>
 

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Re: 1970 P1800 E. Very noisy fuel pump. (ktm_525)

The pressure and flow are not hard to test. Remove the hose from the coldstart injector and connect a pressure gauge to it. It should read 28 PSI when running. <br>Flow rate is more involved. Take that hose and remove the gauge and put it in a litre soda bottle (clean if you want to reuse the gas) and start the fuel pump not the engine by putting a jumper on the fuel pump relay. Run the pump for one minute and 0.8 liters should be in the bottle.<p>If you want more information on the FI system, VCOA sells a reprinted troubleshooting manual that Volvo used to teach their service guy's. Go to the VCOA website, I think it's there.
 

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Re: 1970 P1800 E. Very noisy fuel pump. (VolvoBob)

Thanks for the tips. The car came with a second pump which I hope the original owner didn't get around to installing.
 

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Re: 1970 P1800 E. Very noisy fuel pump. (ktm_525)

Checked to make sure the booklet was on VCOA's site, it is.<br>If you have to do anything with the fuel lines, I sugest that you relace ALL the flexable lines! You may even find some under the car by the seats. The ES had them to join the steel fuel lines there. Why they didn't run one line is <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0"> <br>Good luck and hope that other pump is good.
 

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Re: 1970 P1800 E. Very noisy fuel pump. (VolvoBob)

Thanks. I will hope the other pump is good because it looks like a new one is about $500 CAN. I just blew some dough on some Cibie' headlights and Osram bulbs. Sealed beams RIP. <IMG NAME="icon" SRC="http://********************/smile/emthup.gif" BORDER="0">
 

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Re: 1970 P1800 E. Very noisy fuel pump. (ktm_525)

Cibe headlights did you say! Can't find them down here especially the Bobi units I have on my 1800 They are sealed with replaceable bulbs. They have a glass section that seals it. Any chance that some one up there has them?
 

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Re: 1970 P1800 E. Very noisy fuel pump. (VolvoBob)

Actually the supplier is out of California.<p><A HREF="http://www.cibieusa.com/index.htm" TARGET="_blank">http://www.cibieusa.com/index.htm</A>
 
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