Wedgeless................for the day!

[dickymint]

Well thats it, all i can do is sit and wait. The 350 now in for MOT (thanks to Shpub for supplying drawing of dizzy cap lead positions).
The SEAC is at Motorsports being tuned and having the missfire diagnosed - why do i get that feeling its gonna be an expensive day???
And its Friday the 13th

Good news is the Wife is gonna use the 350 for a couple of weeks in view of keeping it

[dickymint]

Well its good news for the 350i - just needs a tyre and a headlamp glass.....yipeeee

But bad news for the SEAC - been charged for 4 hours labour to fit plugs and fuel filter and thats with 2 hours nocked off cos they couldnt find the fault In fairness its going like a rocket in between missfire/hesitations. But i'm still no nearer telling if its spark or juice
Big thanks to RT Racing for talking through a few things with the tuner
Looks like the spanners are coming out again tomorrow.

[dickymint]

Well...decided to try a new coil. Couldnt get an uprated one so fitted (strapped it onto existing one cos i couldnt get the damm bolts out!! why oh why are the bolts over an inch longer than they need to be??)
Anyway one of the connections on the -ve side of the coil fell apart and on a closer look it was only crimped on by a couple of strands EUREKA this could be it. Fired her up with the new coil on and all seems well. Much much better, in fact the best its ever gone May have been the coil, may have been that connection, may have just disturbed some other rotten wire. Who knows? who cares? i'm happy for now.......except for the £180 bill from someone who couldn't tune a one stringed guitar

One question though - the tuner said he couldn't get a co reading higher than 1.5%. I thought that the larger engines run better at about 3%. do i have an airflow problem? or a fuel pressure regulator problem?
Any ideas?

[rev-erend]

You have just run out of adjustment on the (flapper) mixture adjust screw - you would need to moved the internal mechanism one notch to allow a bit more adj.

Can't tell you which way .. it's just a notched wheel..

[dickymint]

rev-erend said:

You have just run out of adjustment on the (flapper) mixture adjust screw - you would need to moved the internal mechanism one notch to allow a bit more adj. Can't tell you which way .. it's just a notched wheel..

Aahhh that one! The one that nobody likes to fiddle with.

[rev-erend]

That's the one .. one or two notches either way won't affect things much...

[Gerry Attrick]

Turning the wheel anti-clockwise (viewed from above) will make it richer. The problem is that by moving this, you will adjust the fuelling throughout the range, and not just at idle. If you do go ahead, I suggest marking the original position so you can get back to where you started, if you make a hash of it. I've seen changes of 50% fuel consumption just by moving it a couple of turns. I managed to get almost 30 mpg on one run, but it was bl**dy weak.

If you can't get the idle rich enough, I would start with the idle air screw (next to the plenum) and check it's approximately correct (five half turns ????) There is a fine balance between this and the mixture screw to get the right idle speed and CO level.

[rev-erend]

Gerry..

Many thanks - it's been years since I've tinkered with these 'old' flappers .. so I'd forgotten all of that.