backfire

ttop5.0 · May 12th, 2006, 11:03 PM

ok, so i was cruising home from work today, toying with a little 4 banger acura, hit the throttle, no response other than a backfire, and the car shutting down, i have an 85 5.0 with a 650 holley vacuum sec. i had started it up again to get it home, ran nothing over 1500rpm, till i got home, thought maybe power valve ( ithinks it;s called) replaced... idles @ 2000-2300, vacuum leak maybe please help gotta get to work in the morning

stang fanatic · May 13th, 2006, 01:13 AM

DID YOU TAKE THE CARB OFF??? TORN MOUNT GASKET??? RUN CAR AND SPRAY CARB CLEANER ARIOUND MOUNT AREA AND SUCH....FORGET A VACUUM LINE IN BACK?????

ttop5.0 · May 13th, 2006, 01:19 AM

I don't think I forgot anything, i double checked everything, i also took the intake off just in-case, i thought vacuum leak, re-sealed with new everything and started it up, idled @2000 again, ran for about 5 minutes, and shut it off because i noticed my headers were "glowing" red hot, about 30sec. later the loudest backfire i have ever heard...

also took carb to carb shop, he jerry rigged my vacuum secondaries to mechanical, i noticed they were also stuck open, could that cause my "glowing:, .. to much fuel?.. i know thats why it backfired, right????

stang fanatic · May 13th, 2006, 01:28 AM

YOU GOT THAT RIGHT!!!!! HELL, IF THE ENGINE WONT SUFFICE KICKING THE SECONDS. BUY A SPRING KIT AND INSTALL A LIGHTER SPRING ON THE DIAPHRAM....TRY TO UNJERRY RIG THOSE PUPPIES!!!!

turp · May 13th, 2006, 10:10 AM

Originally Posted by stang fanatic

YOU GOT THAT RIGHT!!!!! HELL, IF THE ENGINE WONT SUFFICE KICKING THE SECONDS. BUY A SPRING KIT AND INSTALL A LIGHTER SPRING ON THE DIAPHRAM....TRY TO UNJERRY RIG THOSE PUPPIES!!!!

stang fanatic · May 13th, 2006, 03:32 PM

HINT, hint???????? it gets tough at the late hours you know...

ttop5.0 · May 13th, 2006, 09:59 PM

torn carb mount.. i took the carb back off and looked at it and sure enouth it was torn, not all the way through though, so maybe thats it, i will find out later, thanks guys...

GTXRacing · May 17th, 2006, 10:25 PM

Yeah be sure that vac hose that goes to the back of the carb is in. I was fixing my carb after getting all the parts on day and hooked it all back up even saw the vac hose behind the carb. Started it up smoothly, then the second I hit the gas, it started choking and coughing and stuff. So for the next 3 days looking at the heads and everything else, I found the vac hose wasn't in so plugged it in, then is revved like I accidently touched the back of a very very pissed lion that hasn't gotten any sleep for two days! LOL

May 12th, 2006, 11:03 PM	#1
ttop5.0 Regular Join Date: May 2006 Posts: 109 iTrader: 0 reviews	backfire ok, so i was cruising home from work today, toying with a little 4 banger acura, hit the throttle, no response other than a backfire, and the car shutting down, i have an 85 5.0 with a 650 holley vacuum sec. i had started it up again to get it home, ran nothing over 1500rpm, till i got home, thought maybe power valve ( ithinks it;s called) replaced... idles @ 2000-2300, vacuum leak maybe please help gotta get to work in the morning

May 13th, 2006, 01:13 AM	#2
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	DID YOU TAKE THE CARB OFF??? TORN MOUNT GASKET??? RUN CAR AND SPRAY CARB CLEANER ARIOUND MOUNT AREA AND SUCH....FORGET A VACUUM LINE IN BACK????? __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 13th, 2006, 01:28 AM	#4
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	YOU GOT THAT RIGHT!!!!! HELL, IF THE ENGINE WONT SUFFICE KICKING THE SECONDS. BUY A SPRING KIT AND INSTALL A LIGHTER SPRING ON THE DIAPHRAM....TRY TO UNJERRY RIG THOSE PUPPIES!!!! __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 13th, 2006, 03:32 PM	#6
stang fanatic Enthusiast Join Date: May 2006 Location: El Paso, Tx Posts: 861 iTrader: 0 reviews	HINT, hint???????? it gets tough at the late hours you know... __________________ "The gods too are fond of a joke." "If I had only known, I would have been a locksmith. "

May 17th, 2006, 10:25 PM	#8
GTXRacing Enthusiast Join Date: Apr 2006 Location: Greenville, Texas Posts: 733 iTrader: 0 reviews	Yeah be sure that vac hose that goes to the back of the carb is in. I was fixing my carb after getting all the parts on day and hooked it all back up even saw the vac hose behind the carb. Started it up smoothly, then the second I hit the gas, it started choking and coughing and stuff. So for the next 3 days looking at the heads and everything else, I found the vac hose wasn't in so plugged it in, then is revved like I accidently touched the back of a very very pissed lion that hasn't gotten any sleep for two days! LOL __________________ THE BEAST IS FOR SALE!!! GTX RACING & PERFORMACE CLUB OF TEXAS Meets and greets, drag racing and good eats, you know you want it. GTX Racing Tony P. 214-257-3635 http://www.moddedmustangs.com/forums...vehicle&CID=43

May 13th, 2006, 01:19 AM	#3
ttop5.0 Regular Join Date: May 2006 Posts: 109 iTrader: 0 reviews	I don't think I forgot anything, i double checked everything, i also took the intake off just in-case, i thought vacuum leak, re-sealed with new everything and started it up, idled @2000 again, ran for about 5 minutes, and shut it off because i noticed my headers were "glowing" red hot, about 30sec. later the loudest backfire i have ever heard... also took carb to carb shop, he jerry rigged my vacuum secondaries to mechanical, i noticed they were also stuck open, could that cause my "glowing:, .. to much fuel?.. i know thats why it backfired, right????

May 13th, 2006, 09:59 PM	#7
ttop5.0 Regular Join Date: May 2006 Posts: 109 iTrader: 0 reviews	torn carb mount.. i took the carb back off and looked at it and sure enouth it was torn, not all the way through though, so maybe thats it, i will find out later, thanks guys...

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