F7R miss-firing

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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Chris_C
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Re: F7R miss-firing

Post by Chris_C »

Speedy88 wrote: Chris's is a different map but adam's mates is the same as the one I have currently. I'm clueless!
This bit has me very confused :(

On the plus side, I should have on board diagnostics by the weekend, I've been making progress at pace on it. Fingers crossed
'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
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340GLT
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Re: F7R miss-firing

Post by 340GLT »

I would check the fuel pressure out but its a mystery to me too. When you first start it does it idle and at what speed?
I was talking to chris about it and if all else fails i will bring a load of stuff up to York. The fuel pump is one i ran in mine for ages. Mine was never great on fuel but never that bad.
What ECU are you runnning now? And what chip?
Adam
F559 LFE - 340R 2.0 16v
C208 CTR - 340 1.8 16v
D300 LBO - 360 GLT 3 Door Turbo project!! (and restoration)
F706 RBX - 350R in process!!!
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Speedy88
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Re: F7R miss-firing

Post by Speedy88 »

It does idle, same speed it will idle at warm which is around 1000. It will fluctuate about 50-100 each way constantly (so up, down, up, down etc). I'm running your old ecu.
'88 340 Williams (Sold)
'85 360 GLS - Drift project (Sold)
'77 Colt Sigma
'96 940 Drift project
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Speedy88
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Re: F7R miss-firing

Post by Speedy88 »

Just a small update, haven't been able to get a fuel pressure meter yet, it'd be special order from sealey. I played around with the fuel regulator which made no difference, all I know is a half turn anti-clockwise on the top screw will stall the engine. Turning any amount clockwise will make no difference to firing. I found my source of the smell of fresh fuel - the regulator was leaking from the adjuster bolt/blue hose that goes to manifold. Bolt "gaskets" were ok so tightened everything up. Hopefully that'll be the end of it.
'88 340 Williams (Sold)
'85 360 GLS - Drift project (Sold)
'77 Colt Sigma
'96 940 Drift project
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griffo20022
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Re: F7R miss-firing

Post by griffo20022 »

hopefully you will have sorted it dude, I hate mystery problems like this! my 1.4's the same atm!
'90 340 1.4 Vince!
'94 BMW 325i Saloon
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Speedy88
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Re: F7R miss-firing

Post by Speedy88 »

Fuel pressure was at 4 bar :lol: Also the idle air valve had got sticky. Another more recent problem (running on 3 cylinders) was caused by a dodgy injector plug. Now my car runs sweet as, averaged about 20-25mpg approx on the way home. Not great but that was mixed lanes/country roads. Thanks for the help Adam as always :340:

edit: forgot to add, the timing belt tensioner was seizing. Replacement was fitted although 5 minutes after removing it, the old one seized solid. As adam's mate put it: "Dodged a bullet there" :shock:
Last edited by Speedy88 on 03 Mar 2010 01:01 pm, edited 1 time in total.
'88 340 Williams (Sold)
'85 360 GLS - Drift project (Sold)
'77 Colt Sigma
'96 940 Drift project
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340GLT
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Re: F7R miss-firing

Post by 340GLT »

No worries mate glad it got it sorted.
Adam
F559 LFE - 340R 2.0 16v
C208 CTR - 340 1.8 16v
D300 LBO - 360 GLT 3 Door Turbo project!! (and restoration)
F706 RBX - 350R in process!!!
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Chris_C
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Re: F7R miss-firing

Post by Chris_C »

Just got a text from Speedy about this, great effort finding all the problems guys.
'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
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