Volvo 340 F7R HELP!!!

B14, B172, B19/200, D16 engine, ignition, cooling, fuel & exhaust system, gearbox, variomatic, final drive... | Tuning: engine swaps, welded diff, clutch upgrades...
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evilmickey6
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Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 06 Mar 2013 01:10 am

How would i check it ?

evilmickey6
Posts: 59
Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 07 Mar 2013 11:35 pm

Met Chris_C tonight and hes a lovely chap.

Let me use his coilpack which he was unsure of the health on.

And it had the same problem. He thinks it could be fuel starvation.

HOWEVER.

Whilst on the way home i had like literally nearly no fuel in the tank and it ran perfectly. Pulled solidly through all the gears.
Put fuel in and it started doing it again. Could it be over fuelling ??

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jon-ovlov
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Location: Bristol/Birmingham

Re: Volvo 340 F7R HELP!!!

Post by jon-ovlov » 07 Mar 2013 11:44 pm

where is the pick up for the fuel pump? Could it be moving about due to the larger amount of fuel in the tank? (its probably not the issue, but going on what you have said . . .) otherwise fuel filter/lines ok?

Does it do it when revving at a standstill?
Image
Speedy88 wrote: Leave choke on, idling obnoxiously until neighbours peer out windows at the noisy exhaust
Give neighbours thumbs up
Rev engine to 7K
Exit street sideways
Win at life.

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Chris_C
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Re: Volvo 340 F7R HELP!!!

Post by Chris_C » 08 Mar 2013 12:36 am

I had a bit of a think on the way home, given how it pops and bangs after it stutters, I'm back to thinking it's missing spark, or, as you say, over fuelling and weak spark, hence the fuel popping in the exhaust. I still think given how shonky your fuel feed looks from the bits we've seen, I would:
*Firstly, remove the max power adjustable regulator for a standard. Speedy's car ran hopelessly when it had one. Just a shame about that crimped and cut hose... I was going to look at my spare Megane head to see whether that still has a rail on it.
*Secondly, have a poke at what is actually in the fuel system setup that you can't see, under the car and in the tank. The fact your fuel lines are drivers side means they have been fiddled with all the way through.
*Thirdly... erm, well, see where you are at that point.

Really good to meet you too, great to see someone else how is keen with spanners and wants to do a proper job. I really do like 90% of that install, it's been done with care. It's just a shame the last 10% hasn't been, but you'll get there!

That meet is monthly... it's an eclectic set of nutters, but there is some interesting shiny turns up.
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12 - NASLR Time 15.7secs
'03 S60 D5 SE, '91 (J) MX5
Ex:
'91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

evilmickey6
Posts: 59
Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 08 Mar 2013 06:36 pm

It doesn't do it on revving stand still. Also it doesn't do it once the wheels start spinning either. So only when there is resistance :/

It's very bizarre. Gonna check the pick up like said and take some pictures. Also intend to change all the fuel lines and have a mess with the aftermarket regulator and see if it makes a difference.

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jon-ovlov
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Re: Volvo 340 F7R HELP!!!

Post by jon-ovlov » 08 Mar 2013 06:52 pm

ok so only under load? Sounds more ignition like now. Guh cars are so confusing.
Image
Speedy88 wrote: Leave choke on, idling obnoxiously until neighbours peer out windows at the noisy exhaust
Give neighbours thumbs up
Rev engine to 7K
Exit street sideways
Win at life.

evilmickey6
Posts: 59
Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 08 Mar 2013 07:58 pm

Yer only under load. But it makes no sense when it has little fuel doing it :/ I'm going to change spark plugs tomorrow and then see if that works. Might try messing with the regulator and see if that makes a difference.

evilmickey6
Posts: 59
Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 15 Mar 2013 11:52 pm

What pressure should my fuel pressure regulator be at ?

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jon-ovlov
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Re: Volvo 340 F7R HELP!!!

Post by jon-ovlov » 16 Mar 2013 02:09 am

3 bar
Image
Speedy88 wrote: Leave choke on, idling obnoxiously until neighbours peer out windows at the noisy exhaust
Give neighbours thumbs up
Rev engine to 7K
Exit street sideways
Win at life.

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