Funny starting problem..

Various, various and more various!
Post Reply
CBA
Posts: 1071
Joined: 24 Mar 2010 02:14 am

Funny starting problem..

Post by CBA » 18 Feb 2011 09:04 pm

Car: 1.7 88' 340 saloon manual.

Fault: When starting on choke with COLD engine it starts almost immediatly, runs for 1 or 2 seconds then conks out, exactly like fuel was being cut off. Tshh Tshh... Bruuummmmmm m m m STOP. :?

Will get a video if it helps.



With warm engine its one touch and starts, no accelerator no choke, just turn it.

CBA
Posts: 1071
Joined: 24 Mar 2010 02:14 am

Re: Funny starting problem..

Post by CBA » 18 Feb 2011 09:05 pm

CO level was 0.01 ppm.
HC was 0.06 ppm at MOT

CBA
Posts: 1071
Joined: 24 Mar 2010 02:14 am

Re: Funny starting problem..

Post by CBA » 18 Feb 2011 10:07 pm

yes it idles lean, no doubt about it. but the start stop restart thing.. could it be the carb flange has warped?

morgan105
Posts: 282
Joined: 30 Dec 2004 07:34 pm
Location: Wirral, UK

Re: Funny starting problem..

Post by morgan105 » 19 Feb 2011 12:16 pm

That is lean!
You could always try turning your adjustment screw a quarter turn at a time to see if it cures it, if it does'nt just turn it back.
My sisters car is doing this at the moment but have not got around to adjusting hers yet but my wifes used to stall under harder braking, I adjusted the lean mixture on that and cured that problem and only took a quarter of a turn. Will have to have a look at my sisters car so when I get chance as hers is really lean also going by mot which was lower then the wifes car.

sven360
Posts: 1856
Joined: 20 Nov 2004 11:36 pm
Location: up shitcreek

Re: Funny starting problem..

Post by sven360 » 19 Feb 2011 02:07 pm

With some of those figures I'd be expecting the exhaust valves to burn out pretty soon.
Keeper of The Knights' of Bushido-lest we forget

Write it in your heart.
Stand by the code and it will stand by you.

Ask no more and give no less than honesty,courage,loyalty,generosity and fairness.

The code of the West.

CBA
Posts: 1071
Joined: 24 Mar 2010 02:14 am

Re: Funny starting problem..

Post by CBA » 20 Feb 2011 01:17 pm

Right'o on the cooking valves, I'll get right on it, thanks man!
I'm sure my local garage will let me use their co meter for 5 mins If I ask nicely.

CBA
Posts: 1071
Joined: 24 Mar 2010 02:14 am

Re: Funny starting problem..

Post by CBA » 20 Feb 2011 01:19 pm

its only at idle, the mixture seems fine when driving no pinking going on.

pettaw
*** V3M DONOR ***
Posts: 1673
Joined: 15 Aug 2004 07:39 pm
Location: London, UK

Re: Funny starting problem..

Post by pettaw » 24 Feb 2011 03:45 pm

I would think the cold starting problem is due to an over eager vacuum pull down on the choke, as the engine starts, its opening the choke a bit too far and the car dies off again. You need to measure the choke gap whilst pulling down on the vacuum pull down. I'm afraid its not very easy to describe but basically put the choke full on, and then push down on the white lever that has a screw on it just under the carb top. That will open the choke flap, measure that gap and it should be as in the specifications, from memory its about 4.5mm or so.

CBA
Posts: 1071
Joined: 24 Mar 2010 02:14 am

Re: Funny starting problem..

Post by CBA » 26 Feb 2011 01:33 am

That seems to be what it is, I'll adjust the carb properly and see what happens - it's been running really good apart from that, mate said it was very nippy and he's been bombing around in a new beamer all week :D

Post Reply