adjusting rocker arms

[AndyLT1]

I'm getting a backfire on acceleration. I decided to adjust the rocker arms to see if that fixes it. I turned them 3/4 of a turn from zero lash. I still have the backfire. It may not be the rocker adjustment causing this, but I was wondering how far past zero lash you guys usually turn them.

Andy

[SLeeper]

Backfire is 'usually' related to timing issues and/or vacuum leaks.

Improper lash/pre-load causes noisy valves, rough idle, poor performance
in general.

For a hydraulic lifter, I like to set 0.010" pre-load which is around
1/8" of a turn after zero lash.

It gives the lifter more RPM and still has some pre-load to adjust
for tolerance in the valve train.

Check out this link:
http://www.gafba.com/articles/article.asp?tid=3

[AndyLT1]

Thanks for the link Sleeper. Interesting stuff.

Andy

[ZMAN_DIEHL!!!]

my car acted a fool like that and it was because of a faulty intake seal MAJOR VACUUM , not to mention OIL from hell leaking