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-   -   Backfiring while driving, not while sitting still? (https://www.racingjunk.com/forums/showthread.php?t=22277)

rob41willys 11-21-2008 08:41 AM

DADMOD93 Good call!!!!

Tod74 11-22-2008 08:00 AM


Originally Posted by zipper06
If it was a totally flat lobe it would be hissing back thru the carb at idle or low rpm something you could definately hear, not to say it's not, a compression check would definately tell that story, what no one has mentioned if a week or broken valve spring, just a thought, because i too have no idea what the problem is without looking at it and investigating it myself.

JMO

Zip.

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.

lively 11-22-2008 08:11 AM

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

Tod74 11-22-2008 09:18 AM


Originally Posted by lively
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.

lively 11-22-2008 11:20 AM

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

poncholvr 11-24-2008 10:47 PM

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??

Tod74 11-24-2008 10:49 PM


Originally Posted by poncholvr
chevy had the weird firing orders on a few of them ?

:?

poncholvr 12-05-2008 09:25 PM


Originally Posted by Tod74

Originally Posted by poncholvr
chevy had the weird firing orders on a few of them ?

:?

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

dparker 12-06-2008 05:16 AM


Originally Posted by poncholvr
what motor is it ?- is the crank firing order the same as the cam?


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

zipper06 12-06-2008 10:07 AM

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.


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