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Old 08-09-2023, 02:54 AM
BogfordGarage BogfordGarage is offline
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Join Date: Aug 2020
Location: Devon, UK
Vehicle: 1990 Volvo 940 TD & 1989 Volvo 760 TD
Posts: 59
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Thanks for your reply Ngoma I will double check the fuse holder. Luckily it's a 940 so doesn't have the biodegradable wiring of the 200 and 700 series.

I may have misdiagnosed the problem however as I now believe, like you suggested, I have a very small leak letting air into the fuel. I was fiddling around doing some voltage checks yes and just thought I should rev the engine while keeping a close eye on the clear fuel line. As it came back to idle a second or two later a large air bubble would travel between the filter and the pump I repeated this a few times and the results were the same but it did not stall. I took the other car to work yesterday but today I've removed the fuel filter and double checked the seals, made sure no old seals weren't stuck on the bracket, topped up the filter and refitted. It started first time no problems runs great but still when revving and coming back to idle I got a large air bubble as before. Any suggestions as to where to look next?
Many thanks
Tristan
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