Popping on the over-run

[angus]

Running down steep hills yesterday, in gear, and was aware of quite a bit of popping from the exhaust - is this an indication of running a bit rich? (coupled with a very very slight hesitation at lower revs - just about a small flat-spot, but nothing serious)
If so, which was to I tweak the distributor to fix...? Engine generally runs very very well....

 

[easy]

Could be running a bit rich for sure, is the idle okay? it could also be a hole in the exhuast somewhere 8)

 

[super-craig]

could be hole in exhaust or an air leak on a joint

 

[angus]

I'll check the exhaust, although it is all new, so should be ok.
Idles perfectly, starts in an instant...

 

[super-craig]

you checked the heat riser tubes , i had a leak on one the other week , it drove ok , ran ok but once it was repaired it was a lot better 8)

 

[Anonymous]

I'll check the exhaust, although it is all new, so should be ok.
Idles perfectly, starts in an instant...

Did the popping start since replacing the exhaust? if so I would definitely check all joints.

 

[rustydiver]

Mine started to make a popping sound, then progressed onto full backfireing, used to scare people queing up to go into the cinema when we drove past, sounded like a drive by shooting.
Found to be a small hole in the exhaust box.

Used to be in the car parts trade and even new boxes ( vary rarely) were found to have holes in them.

 

[angus]

Haven't had a chance to have a good look at joints yet - exhaust is new, as the van has been off the road for 8 years, but has been running fine, so either something has 'moved' or I have fiddled with the timing and may have [cough] turned the distributer slightly - was just wondering if the 'symptoms' suggested the timing might need advancing or retarding....

 

[bananacustard]

Mine does this when the points aren't right. They seem to revert to closed eventually however tight I do the screw.