bobj@meaddata.com (Robert Jones) writes:
> I am at a complete loss now. I've tried everything, and my MGB is still
> not running right. Last night I installed a new timing chain and tensioner
> only to find that the car still exhibited the exact same symptoms as
> previously. The old chain had stretched some and the tensioner pad was
> very shot, so it needed to be replaced anyway, but even though the timing
> no longer bounces around like crazy, the car still runs crappy. I need
> your help!
My sympathies, Bob. I could have sworn that a new timing chain and gears
would have pulled all the slack out of the system.
O.K. Now some brainstorming in no particular order, and including stuff
that you have probably already checked...
1) Vacuum leak. Completely or partially sheared vacuum hose allowing air
in under some circumstances (e.g. engine twisting on mounts under hard
acceleration).
2) Some too-clever 1974 emissions valve opening or closing under some con-
dition of engine operation. This presumably would be something mounted
on the body, not on your '69 engine block.
3) Bad electrical connection in distributor harness causing intermittent
cutout of plug firing.
4) Sticky valve stem or weak spring preventing valve from closing occasionally.
I'm at the end of MY rope, and I don't even OWN the car!
-- Andy
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