1.7 340 not starting...... Any help appreciated!

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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volvosneverdie
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Re: 1.7 340 not starting...... Any help appreciated!

Post by volvosneverdie » 06 Jun 2009 10:09 pm

Jonofdoom wrote:Well I just tried it with no choke, 50 minutes after a good run, and no throttle, and it started right up!! I'm confused, I'm still not sure if I dreamed the problem up or what:D
I'm sure I'd tried that, that's the first thing I did the first time this happened!
So yeah, I'll give it a while and try it a few more times before I take it as solved, but yeah, I think it may have just been me being a 340 noob:D
good news dude.

it'll be running a bit better than it was with the old float and ign parts man.
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Re: 1.7 340 not starting...... Any help appreciated!

Post by Chris_C » 07 Jun 2009 12:05 am

Jonofdoom wrote:Well I just tried it with no choke, 50 minutes after a good run, and no throttle, and it started right up!! I'm confused, I'm still not sure if I dreamed the problem up or what:D

I'm sure I'd tried that, that's the first thing I did the first time this happened!
Superb news, even if it does mean we can wind you up about it ;) As Dspec says though, you've fixed a load of stuff that would have caused you problems in the meantime, so nothing was in vain. Fingers crossed it was only you!
'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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Re: 1.7 340 not starting...... Any help appreciated!

Post by Jonofdoom » 07 Jun 2009 03:28 am

Well so far I've started it up during the dangerzone two or three times now, and its' been just fine! I'm blaming the float, or, errm, the something, or, errrrrrm, dammit it must've been me:D

Like ya say, at least its' got mostly new ignition, that can't be a bad thing..

Seems the problem has flipped a little bit now, and its' running terrible from cold! Just for a couple minutes.. Threatening to cut out and juddering. Argh well, I'll have a look tomorrow and see if the choke is definitely working properly etc before I work myself into another confused blur of retardedness.. Its' since I took the carb off and apart anyways, it's gotta be something to do with that process.. Hell, its' probably just me being stupid again:D


volvodspec wrote:suiped up b14 :twisted: car is on this forum aswell: http://www.volvo300mania.com/forum-uk/v ... =13&t=7946

engine has about 140bhp to start with, after the big rebuild it still needs to run easy the first 800 miles. after that, other carb + higher boost, hoping to get at least 180bhp out of it to start with :D
Sweeeeeeet! I've no idea what it's like is over there, but here, as you may know, we got a cheaper tax band for engines 1549 and under.. Big power with cheap tax would be nice! Ok so the price difference isn't even that much, but it'd still be cool anyways:D

Take that, government:p

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Re: 1.7 340 not starting...... Any help appreciated!

Post by Chris_C » 07 Jun 2009 08:08 am

It'll be the mixture being miles out, as the float now works correctly, as opposed to being half sunk. The fact the engine was running alright with a sunk float means someones fiddled with it, so take it to a garage as said above, and get the CO measured and adjust for it.
'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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Re: 1.7 340 not starting...... Any help appreciated!

Post by Jonofdoom » 07 Jun 2009 03:16 pm

Ah cool cool... Good plan:)

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Re: 1.7 340 not starting...... Any help appreciated!

Post by pettaw » 07 Jun 2009 08:21 pm

There's a guide on how to set the mixture and idle speed in the 1.4 running FFS thread. The screw positions are different but it applies just as well to any carburated car tbh.

Run the car till its nice and hot, preferably drive the car and not just idling. Then once you get the car parked up and ready do this fairly quickly, within about 5 minutes if you can, so the carb doesn't get over hot.

Set base idle and base mixture as follows:
The idle speed screw is accessed from the top of the air cleaner cover, by poking a long flat head screwdriver down it. The mixture screw is in the baseplate (number 9 in that diagram that someone posted earlier)

Screw the mixture screw out (anti-clockwise) until the engine idles at its maximum revs, the best possible idle. Then screw the idle speed until the rpms are 950rpm. Then go back and trim the mixture screw again, adjusting for highest idle speed. That will put you at approx 5% CO, way too high for an MOT test and bad economy. So to get it down to a good mixture, carefully screw in the idle mixture (clockwise) until the revs just drop very very slightly 50 rpm or so and the engine begins to sound just a tad weaker. That'll get you to the 2.0% CO or so that you'll need to get a reasonable tune.



What's odd about this problem is that the car seemed to run OK, but was bad on starting after having stood. I have a feeling there may be another problem still, like a sticky fuel cut off solenoid (I would take it out and clean the end with some carb cleaner. If it was flooding then ten minutes after switching off I could understand, because that's when the peak underhood temperature is reached after the engine is switched off but not an hour.....hmm.

Anyway, if you suspect flooding unless its major major over-rich, you can normally get some sort of response by cranking over with the choke fully open and the throttle wide open too. Don't pump the pedal though else the accel pump jets just pump neat fuel down the barrels.

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Jonofdoom
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Re: 1.7 340 not starting...... Any help appreciated!

Post by Jonofdoom » 07 Jun 2009 10:03 pm

Cool.. I've just come back from a drive, I'll go try that carb tweaking bit right now:)

I have to admit I'm a bit 'hmm' about the whole thing too, even though I've not seen the problem in a day or so.. It's mainly that I've still not got 100% confidence that it'll start right every time. Time will tell though I suppose, it'll take a little while for me to regain my trust in it:D

Where is the fuel cut off solenoid?

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Re: 1.7 340 not starting...... Any help appreciated!

Post by pettaw » 07 Jun 2009 10:11 pm

The big metal thing with the wire going into it. They're not put in that tight so might well undo by hand, if not then just a tweak with a spanner on the flats near the carb.

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Re: 1.7 340 not starting...... Any help appreciated!

Post by Jonofdoom » 07 Jun 2009 10:24 pm

pettaw wrote:The big metal thing with the wire going into it. They're not put in that tight so might well undo by hand, if not then just a tweak with a spanner on the flats near the carb.
Ahh cool, was referred to as the idle solenoid earlier in the thread, different names for the same ting I suppose...

Also, before I go getting this wrong, you mention the 'mixture screw', and the 'idle speed' screw, but the last screw to adjust is the 'idle mixture'.. Which screw is this? I'd assume its' the mixture screw, but thought I'd ask to be sure....

Had to go for drive to heat engine up again (spent too long on internet) and got confused about the screws.. Will do it tomorrow instead:)

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Re: 1.7 340 not starting...... Any help appreciated!

Post by pettaw » 07 Jun 2009 11:04 pm

Yeah, mixture screw. Just turn it down slowly until you've heard the engine note change just a touch, and you'll notice hopefully that its dropped about 50 rpm. If it drops more, then you've made it too lean.

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Re: 1.7 340 not starting...... Any help appreciated!

Post by Jonofdoom » 08 Jun 2009 12:07 am

Nice one dude.. Cheers for the tips:D

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Re: 1.7 340 not starting...... Any help appreciated!

Post by Jonofdoom » 13 Jun 2009 01:44 am

While I'm here I thought I should let you lot know that it's been starting reliably since my last posts here.. A good few days now:D

Not got around to tuning the carb yet as I'm fairly excited that it actually gets me about the place again so I've been doing loads of fun stuff, catching up on all the car-less time the other week... It's not so urgent now it's starting every time:D

Still running terrible from cold, but at least it's reliable!
Must get those screws adjusted.......




Looking for an F7P now:D:D

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Re: 1.7 340 not starting...... Any help appreciated!

Post by volvosneverdie » 13 Jun 2009 09:52 am

Good news dude. Glad you're enjoying yoursef.
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