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Discussion Starter · #1 ·
I just acquired this Volvo from the original owner. It has only 88,000 miles and appears it was meticuliosly maintained. However, last summer the previous owner let it sit for 6 months and when she attempted to start it, it bucked, stalled and would'nt maintain an idle. Since I bought it, I have drained the old gas (smelled kinda funky!), replaced the fuel filter, and replaced the main fuel pump. The fuel pressure was still weak/intermittant, so I had a local mechanic replace the in-tank fuel pump (i was not personally worthy of this task!).

The mechanic has confirmed it now has the req'd fuel pressure (from the fuel line @ fuel filter). However, now it seems the (excess?) fuel immediately fouls the plugs, causing the car to briefly start and then stall. The only thing he knew to check today is the air/fuel mixture at the air flow sensor (? i had to had to locate for him a specific 3mm allen wrench for this purpose). I've not heard from him today so, i'm assuming this did not correct the problem.

Because the mechanic has no experience with Volvo's, he said that beyond the repairs mentioned above, he would not know what steps to take next.
Since I live in a small town, without a Volvo shop or tech'n, I'm left with few
choices!!!

I've since been pounding the repair manuals that accompanied the car. Their are some areas/repairs that seem might address the problems, but there was no guidance as to HOW TO CHECK or TEST; only part replacement info.

Can anyone please offer simple 'test' procedures for the following parts, that I can convey to my mechanic; Fuel Distributor, Control Pressure Regulator and/or Air Flow Sensor (is the 'line pressure regulator' contained inside the 'fuel distributor'?).

Please feel free to suggest any other possible problems or area's that should be considered. Sorry for such grand inquiry, but I will be grateful for any & all help!

Thank you, Brooks
 

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Discussion Starter · #4 ·
Re: 1978 245 B21F C.I. *!*HELP*!* (DVolvoguy777)

Hello~~

Thank for the info!

I was wondering....if the fuel ijectors need cleaning/svc'g, would'nt this mean their clogged? Would 'clogged' injectors allow the excess fuel at the plugs, which is now the problem??

Puzzled
Brooks
 

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Discussion Starter · #5 ·
Re: 1978 245 B21F C.I. *!*HELP*!* (gdill2)

Thanks for the info!

With your suggestions about junctions & grounds, are you suggesting that their may be underlying electrical problem? In my novice mind I thought that with the wet plugs it must be a fuel issue!?!

Any specific junctions or relays that would stimulate the C.I. to send excess fuel
(does this question even make sense?!?)?

How'z about the fuel pump relay? This was my assumption on the f.p. relay; if gas is proceeding to the plugs - the fuel pump relay is OK (?). Or, does it play a role in modifying/adjusting amount of fuel pressure/flow??

Thank you again, Brooks
 
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