DADMOD93 Good call!!!!

I thought about that because my car did exactly what his is doing with a broken outer spring but he said all the springs were new and he checked for broken ones.

you see the main problem here is he said everything else was biult right so we are trying to analyze this thru thin air--it is true that most of the time when a miss comes under load it is electrical[but then he said it backfired too/then it started doing it all the time :oops: :oops:

i really think he needs to get someone there [ who does know what they are doing] and go step by step thru the -BASIC THINGS FIRST-- before tearing into the inside of the engine :x :x

way to many mechanics now adays want to think the worst before checking the simple first----i have seen that several times in the last few years that end up costing lots of time and lots of money before they found a cracked connector/ or broken wire/ or something not adjusted correctly
sorry guys but i like to start at basics and go from there :shock: :wink: :wink: :wink:
LIVELY

That's why I asked if he had tried beating on it with a big hammer....I read in someone's signature that if it couldn't be fixed with a hammer you have an electrical problem. :lol: I wasn't being a smart alek I was troubleshooting.

hey TODD---IS THAT A BALL PEAN OR A 10 POUND SLEDGE??????I WANT TO USE THE RIGHT TOOL :lol: :lol:
I PERSONALLY LIKE THE 5 LB SLEDGE[IT TAKES LONGER AND YOUR CAN RELEASE MORE FRUSTRATION :shock: :shock: :shock: :shock:

:lol: :lol: :lol: :lol: :lol: LIVELY

what motor is it ?- is the crank firing order the same as the cam? ( crazy question)- chevy had the weird firing orders on a few of them i dunno much about it ,just a question

is it back firing through the carb?
or Blowing back through the carb???
do you have a gear drive?
is there a off set cam keyway??

:?

corvettes crossfire ect.. is what i meant
i dunno just a thought, i mean how would ppl know other thatn the parts being labled :?:

Where do you get these magic cranks with a firing order? I like to purchase one!!!! :roll:

The only odd fire that GM ever built that i know of was the 2.8 V6, course Warren Johnson did some goofy stuff with the 180 degree motors he tried.

Zip.

misfire under load.
 

I was browsing as a new member and curious as to what subjects are discussed and found your forum. The only answer I saw as correct for your particular symptoms was a bad cam which can happen very quickly on a new motor if certain things come into play. If you checked to see if a rocker arm seemed to not be moving a proper lift that would indicate a worn cam lobe. These things happen and I'd be intereted in knowing if you did solve your problem. Phil D.

Well, after a few beers and a little turning of a wrench, I added a shim under the rocker arm on the intake side of the #1, and presto-chango no more popping! I guess when I had my heads done, the valve seat was off just enough to make the difference. After 2-1/2 years, I finally got the grin back on my face when I took it for a drive!

Thank You Everyone for all the help and replies!!! I'll post up some pics when I get a chance.

Thanks again!!!

John T.

John,

Glad you figured it out. NOTHING is like that grin you mentioned after all that hard work. It is a closure that brings much pride & happiness... kind of like an automotive orgasm.

Check the valves settings
again :D :D