Strange, but when I have the described symptoms with my twin carb
Marcos, its always carb icing.
> From: Dave Massey[SMTP:firstname.lastname@example.org]
> Reply To: Dave Massey
> Sent: Friday, August 07, 1998 10:10 PM
> To: TR List; John Worthy
> Subject: A question of TR6 tuning
> <<<<<<<<<<<<<< End Snip >>>>>>>>>>>>>>>>>>>>>>>>>>>
> Interesting that you should mention it. I've noticed the same
> thing with my 71 TR6 in the 1600-1800 range. It clears up at
> 2000 RPM. My car doesn't exactly bog down but it seams to
> backfire as if it were very lean. And it only odes it after
> running at speed and warmed up. I have put in a Crane ignition
> system, regapped the plugs, and installed new plug wires with
> no change. I've been able to aleviate the problem by backing
> off on the throttle.
> Whilst reading you E-Mail it suddenly occured to me that maybe
> the centrifugal advance is a little sticky and in need of some
> lubrication. Just a guess. Or maybe colder plugs are called
> for. I am running rather lean getting almost 26 MPG (Miles per
> US gallon) Any other suggestions?
> It would be nice to clear up the problem. The 2.5 litre engine
> is wonderfully flexible engine over a wide rev range except when
> it does this.
> Write if you find out anything. I will do the same.
> Dave Massey
> St. Louis, MO USA