wil
Active member
Hi All,
I have a 1600cc early bay with twin dellorto 36 carbs, filter king regulator & stainless exhaust, everything else is stock, running a stock vac dizzy. been running this setup for 6 yrs
During a drive the other day it started to backfire/pop - nothing has been changed, messed with, modified for years so I thought it must be 'muck' in the carbs. Here's what I've done so far but to no avail;
Clean all jets one by one
Clean inlet needles & checked floats are working
Cleaned spark plugs (they were quite black)
Cleaned the leads at the plug ends as some of them had started to rust
Checked rotor arm & cap
Changed fuel pump with new replacement
There doesn't seem to be a pattern to the backfiring/popping but it does seem fine until it's warmed up - then it does it on acceleration/idle & deceleration quite randomly. The only other thing i've noticed is the tinware seems much hotter than usual but i could be imagining this!
Anything I've missed should check next? Spoke to a local 'specialist' & he thought it sounded like a burnt valve...really would like to sort this myself before taking it to a garage!
Oh - & it drives fine, no loss of power or hunting on acceleration...
Thanks in advance
I have a 1600cc early bay with twin dellorto 36 carbs, filter king regulator & stainless exhaust, everything else is stock, running a stock vac dizzy. been running this setup for 6 yrs
During a drive the other day it started to backfire/pop - nothing has been changed, messed with, modified for years so I thought it must be 'muck' in the carbs. Here's what I've done so far but to no avail;
Clean all jets one by one
Clean inlet needles & checked floats are working
Cleaned spark plugs (they were quite black)
Cleaned the leads at the plug ends as some of them had started to rust
Checked rotor arm & cap
Changed fuel pump with new replacement
There doesn't seem to be a pattern to the backfiring/popping but it does seem fine until it's warmed up - then it does it on acceleration/idle & deceleration quite randomly. The only other thing i've noticed is the tinware seems much hotter than usual but i could be imagining this!
Anything I've missed should check next? Spoke to a local 'specialist' & he thought it sounded like a burnt valve...really would like to sort this myself before taking it to a garage!
Oh - & it drives fine, no loss of power or hunting on acceleration...
Thanks in advance