Volvo 340 F7R HELP!!!

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evilmickey6
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Volvo 340 F7R HELP!!!

Post by evilmickey6 » 04 Apr 2012 12:45 am

RIght,

I bought my car about a month ago.

Its a volvo 340 1.7 but with a F7R.

Couple of quick questions. Should it have a rev limit bounce ??

Because at the moment i get into second, put my foot down, it gets to about 40mph and it kinda does this big jolt and a loss of power. Whys this ??

Also when im going sideways in second it kind of rev's up and then bogs down loads! and then picks up again.

Im told the engine could of been cammed up because its quite dodgy idling, like it constantly wants to die. If its cold, i have to rev it a little to keep it alive, and then its fine.

Anyone know whats going on ?? Should i be able to get past 40 in second ??

HELP HELP HELP

frazeb
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Re: Volvo 340 F7R HELP!!!

Post by frazeb » 04 Apr 2012 01:10 am

defo should be able to get past 40 i think its 60 it limits the rev limiter should bounce yes and is it on carbs or fuel injection?

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Chris_C
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Re: Volvo 340 F7R HELP!!!

Post by Chris_C » 04 Apr 2012 09:18 am

Is this the one from Southampton? If so, it was running a Megane ECU which I believe (happy to be proved wrong) no one else here is. I'd suggest it's the better system but a lot harder to get running, as such though things like rev limiters if they exist will likely be different.
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '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
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Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 04 Apr 2012 12:06 pm

Its fuel injection. Im almost sure of that haha.

Ahh i think ive had it past 40 a couple of times when its been running for ages.

Yer it is the one from southampton. What ECU's would people normally run with the F7R'S ?

Its got a mercedes sprinter fuel pump which is meant to put out 4.5 bar, could this be the problem ?

Cheers for the help guys.

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Chris_C
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Re: Volvo 340 F7R HELP!!!

Post by Chris_C » 04 Apr 2012 01:30 pm

Depends on the setup, there is a lot of variation possible.

I run an Evo VI pump on mine, so it's unlikely that, no matter what pressure is going in the fuel pressure regulator if set up right should only allow the correct pressure at the rail, the rest bleeds back to the tank. A bit like 80W speakers only being 80W if the amp pushes that power into them.

Where abouts are you and do you have a video of it running?
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '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
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Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 04 Apr 2012 03:51 pm

Im in Portsmouth.

What i was thinking is that the fuel pump might not feed the engine well enough ?

I could get one for you guys.

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Chris_C
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Re: Volvo 340 F7R HELP!!!

Post by Chris_C » 04 Apr 2012 04:41 pm

The stock FPR is set to 3bar on the clios, so I imagine the megane is similar. Certainly, unless you are flat out up hill at 11squillion revs it shouldn't need it.

I've no idea how possible it is, but diagnostic socket on the loom?
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '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 » 04 Apr 2012 04:44 pm

Yer thats the next step. The guy installed a 16pin diagnostic plug in the car. So ima plug it in and see what the score is...

It does seem like something is missing causing a vacuum leak.. ill get a snap.

evilmickey6
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Joined: 25 Feb 2012 06:26 pm

Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 04 Apr 2012 05:21 pm

Image

I spoke to some mechanic and he said it seems like its hunting alot and could be caused by this ???

Could this be the source of my problems ?

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gray340
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Re: Volvo 340 F7R HELP!!!

Post by gray340 » 16 Apr 2012 08:38 pm

hi did you find out what the problem was as my car has started doing this to :(

evilmickey6
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Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 22 Apr 2012 02:20 am

Yer my fuel pressure regulator wasn't plummed in :/ Its all sorted now...

evilmickey6
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Re: Volvo 340 F7R HELP!!!

Post by evilmickey6 » 04 Mar 2013 10:07 pm

Thread revival. Just bought this car back and it still backfiring under load. Anyone know why this could be. Changing plugs in the next couple of days to see if this fixes it

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Chris_C
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Re: Volvo 340 F7R HELP!!!

Post by Chris_C » 04 Mar 2013 10:19 pm

Get some decent photos of your engine bay up, given the amount of random bits that are possible to swap it could be a lot of things.

It's a shame yours is on a Megane ECU, I have no idea how diagnostics on that works. The info is likely out on the net though?
'89(G) 340 GLE B172k
'03 S60 D5 SE, '91 (J) MX5, 1954 Cyclemaster
Ex:
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12; '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 » 04 Mar 2013 11:43 pm

Tried plugging it in before but just threw up a load of random codes. Might see if I can get it redone. It does have a 16 pin diag plug under the dash. It's just proper weird. Almost like it hits fuel cut

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340GLT
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Re: Volvo 340 F7R HELP!!!

Post by 340GLT » 05 Mar 2013 12:01 pm

Check the coil pack is any good, they are notorious for playing up on the meganes. They break down internally and give a missfire situation under load.
Adam
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