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Re: [T3] Is there a sidedraft expert in the house?


on 26/5/2003 4:11 AM, Steven Ayres at comwest@att.net wrote:

> Backfire (through the carb, the real thing) is bad bad bad! It's also pretty
> rare. How do you know that's what's happening -- air cleaner blown off?
> (Yes? Be sure you have a good fire extinguisher handy at all times!)

It backfired through the carb once while I was fiddling with the accelerator
pump, and while I was leaning over the engine- my ears are still ringing
this morning! ;-) I could hear that it was through the carb as I was coming
up the driveway.

> If it is indeed backfiring, this sounds like a gross timing problem. If you
> haven't already, you'll want to doublecheck that you have the correct firing
> order and that it agrees with your distributor drive. I'd want to eliminate
> the possibility that you're firing 180 degrees out.

Yes I double checked that, when I changed out the 009 for the vacuum only
dist.

> As for your Type 2 cruising speed, there are many factors that could be
> blocking performance: compression loss (cracked or loose head, rings), spark
> loss (leaky wires, plug-jumping, loose coil feed connection), exhaust
> obstruction, fuel obstruction (cruddy main jet, low pump pressure), etc. If
> you're losing oil I think that compression test might prove instructive.
> Start there.

I have changed the SP wires, good spare Bosch 6V coil that I had and I have
put a new terminal on the 15 wire as the old one was nearly falling off. It
has had a new pump put in it, and I checked the main jet. How would you
check for an exhaust obstruction?

Hopefully I will get time to do a compression test today.

Thanks for the suggestions,
Ben Doughney

'75 1200L
'63 1200 - Ringo
'71 1600TL
'65 1500N - Val

http://members.tripod.com/~superkafer/ 

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