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I Was Cruising When Bangg BackfireĦĦĦĦĦĦĦ

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Old 10-13-2002, 07:46 PM
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Car: 87 Vette
Engine: 355/195AFR/SR/219CAM/1.6
Transmission: TH700R4/Vigilante
Axle/Gears: D44/3.45
I Was Cruising When Bangg BackfireĦĦĦĦĦĦĦ

Hey i need help ...my car were running perfect for one year and i was cruising last night and it started to backfire ĦĦĦĦĦ
today i started the car ...and again ...the car spits smoke and fuel out of the carb ..tam tam tam tam
what can happen this ??
HELP ĦĦĦĦĦĦ
ALL the other thigs looks OK ...maybe its Distribuitor problem ?
or coil ???
i dont know Ħ HELP
Old 10-13-2002, 07:48 PM
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Was it during acceleration that it did this?? (backfire thru the intake?)
Old 10-13-2002, 07:56 PM
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Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
Yeah, was it thru the intake or exhaust?

intake might be a timing issue, or running lean.
exhaust, may be due to severe exhaust leak.

Also, check the conditions of your plug wires.
Old 10-13-2002, 08:01 PM
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Car: 87 Vette
Engine: 355/195AFR/SR/219CAM/1.6
Transmission: TH700R4/Vigilante
Axle/Gears: D44/3.45
hey my friends are here

Thanks guys ,,,you are always here to try to help
us ..we are like a family ĦĦĦ
well the rare thing is that mycar was running fine for long time
i was cruising on the city real slow ...i guess at 10 mph
..i slowed down...then it started bum bum bum
and it spits fuel (not much) and smoke (not much)
but a big boom boom sound thru the carburetor
...lthe car lost all the power and when tried to restart it ..it feeled like choked ,,,,but today i went to try,...and the same ...the car started with that problem and cant run ..,tum tum tum
psssssss .....the rare that was so sudden ..so what is it ĦĦ
i have no ide a ,,,i even thoght i blowed the engine but no way
HELP ...
Old 10-13-2002, 08:04 PM
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Car: 87 Vette
Engine: 355/195AFR/SR/219CAM/1.6
Transmission: TH700R4/Vigilante
Axle/Gears: D44/3.45
the distributor is on the same place

is really tight ...so impossible that it lost the timing or can lost the timing anyway ???
meybe ignition module ĦĦ????
Old 10-13-2002, 08:07 PM
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I really have no clue when it comes to carbs but I'll give it a shot. Sounds like the accleration enrichment (Pumpshot on the carb). I don't know much about the needles, valves, and floats on carbs but I know there is something for the Pumpshot on them...


Brian P
Old 10-14-2002, 07:37 AM
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Car: 2000 astro
Engine: 4.3
Transmission: A4
Axle/Gears: 7.5 with 3.42 gears
check your basic stuff first.

like mark said, check your plug wires, and make sure they are all on the plugs.
Old 10-14-2002, 09:05 AM
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Car: 4
Engine: 6
Transmission: 5
Definitely start with the basics. One of those would be the distributor cap: make sure there are no arc tracks inside it from one plug wire terminal to another.

If all that is good, then pull the valve covers off, and check for broken rocker arms and other valve train problems.
Old 10-14-2002, 01:47 PM
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Car: 1988 IROC-Z
Engine: L98 (350 TPI)
Transmission: MD8 (700 R4) + 3.42 LS1 Rear
clogged fuel filter perhaps? same symptoms here. more details or any on maintenance history.
Old 10-14-2002, 02:15 PM
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Car: 1986 camaro
Engine: 383 sbc
Transmission: th-400
Axle/Gears: 4th Gen 10 bolt/Detroit TrueTrac 4.
at least u didnt have your face by a carb when your dad tells you to pour some gas down the throat of it to get it started and lean on the fender while he starts it. lil scarey and hot
Old 10-14-2002, 05:55 PM
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Car: 87 Vette
Engine: 355/195AFR/SR/219CAM/1.6
Transmission: TH700R4/Vigilante
Axle/Gears: D44/3.45
RB83L69 you got it

Hell ĦĦĦĦĦ
i started the car but i started withou the cable 1 ...then cable 2 ....cable 3
abd that was it
without one of them the car was fine ....obviusly was runnin in 5 cyl but no backfire ...
im not sure ...maybe a broken valve or rocker as RB83L69 said
what u think what can cause this ???
Im 100% sure is a valve train problem now ĦĦ
Old 10-14-2002, 05:59 PM
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Car: 98 Z28 vert
Engine: LS1
Transmission: automagic
Axle/Gears: 2.73 - boo racing yay MPG
Do you have a hollowed cat? cause when i bought mine the cat was hollow and i had some backfireing and when e-chack came around and a real cat was in order the back fireing stopped? just a thought
Old 10-14-2002, 06:18 PM
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Engine: 6
Transmission: 5
Check the valve train. If the problem is there, it should be obvious. Broken rocker, broken push rod, broken stud, nut backed off, all of those things on the exhaust; or a broken valve spring on an intake.

If it's not that, it's a head gasket.

As far as the root cause, I don't know.... you'd be a better judge of that
Old 10-14-2002, 10:45 PM
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had the exact same problem, only it happened to me on the whitestone bridge at 1:00 am!! A rocker stud on an exhaust valve broke on my brand new AFR heads. The stud was a chinese piece of crap ( you don't get much for 1700 bucks!) I replaced them all with ARP.

i would guess #5 exhaust, its firing back thru the intake and blowing fuel out of the intake.
Old 10-17-2002, 09:49 PM
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Car: 87 Vette
Engine: 355/195AFR/SR/219CAM/1.6
Transmission: TH700R4/Vigilante
Axle/Gears: D44/3.45
PROBLEM SOLVED ...I GUESS

I took off my valve covers.....VOILA
the pushrod broke the Rocker arm little oil hole
and that was it ...i bought a new rocker and i will install it tomorrow -...i guess that will be the end of the problem
Or not ??
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