|
CABLEGUY1
|
 |
« on: August 13, 2005, 08:36:07 PM » |
|
These were on an RV we recently purchased. As we were pulling away from the check in gate at Croom it backfired and blew both of these out at the same time. It sounded like a freakin bomb. It started back firing over and over again on the way home until it stopped running. I had to turn the distributor until it would start just to get home. I put on new mufflers,plugs,wires,distributor cap and rotor today and it still misses a little. It had a little miss to it from the day I bought it. Any suggestions what it could be? Please don't say timing chain. It would be a real beotch to change.
[attachment deleted by admin]
|
|
|
|
|
Logged
|
|
|
|
|
GSPKurt
|
|
« Reply #1 on: August 14, 2005, 12:55:52 AM » |
|
|
|
|
|
|
Logged
|
Kurt Hargarten
2005 Suzuki Eiger 4X4 5 speed
Warn Winch
|
|
|
|
caospop
|
|
« Reply #2 on: August 14, 2005, 05:29:06 AM » |
|
|
|
|
|
|
Logged
|
2007 Polaris Sportsman
|
|
|
|
big-daddy
|
|
« Reply #3 on: August 14, 2005, 07:22:30 AM » |
|
keith check the carb float. it maybe drip in the intake and filled the mufflers when fuel
|
|
|
|
|
Logged
|
I wonder if we can get Cheney to take Obama hunting?
1985 CJ7 Swamp Buggy named Swamp Thing
2001 Yamaha Wolverine 4x4
2005 Kodiak 450 4x4
2007 F150 Super Crew FX4
Proud RR and FMR member
NRA Life Time member
|
|
|
|
TRX350_On_The_Rack
|
|
« Reply #4 on: August 14, 2005, 08:44:40 AM » |
|
I'm gunna have to say timing chain  Big Daddy's got a good point and check for carb leakage. |
|
|
|
|
Logged
|
|
|
|
|
dynodon
|
|
« Reply #5 on: August 14, 2005, 09:39:49 AM » |
|
Possibly , if the catiletic converters have been changed- the person didnt check to see if the pipe was full of pieces from the old converters., just a thought??, good luck
|
|
|
|
|
Logged
|
The " Black Pearl "
No, you dont want NONE of it
|
|
|
|
Robert4570
Guest
|
|
« Reply #6 on: August 14, 2005, 11:25:49 AM » |
|
If your distributor was tight and timing was correct , then have a tech check for any codes, if its fuel injected .
Like a bad carb , an injector can fail staying open allowing excess fuel into the cylinder and creating a second combustion chamber , your mufflers.
In worst case scenarios the affected cylinder(s) are damaged .
This problem is more common with some of the later high pressure common rail systems .
I doubt the timing chain would be factor unless it has high miles.
Good luck
|
|
|
|
« Last Edit: August 14, 2005, 11:41:53 AM by Robert4570 »
|
Logged
|
|
|
|
|
Quad32x
|
|
« Reply #7 on: August 14, 2005, 01:12:44 PM » |
|
My truck did the same thing. In was carb related. When they go like that MAN is it loud !!  |
|
|
|
|
Logged
|
Team LFG , Local Fat Guys.
Mystic Motorsports Vet Class Rider #32
|
|
|
|
CABLEGUY1
|
|
« Reply #8 on: August 14, 2005, 06:32:05 PM » |
|
It will be alot cheaper to check and repair the carb compared to the timing chain. I will start with that first. Thanks.
|
|
|
|
|
Logged
|
|
|
|
|
gery350
|
|
« Reply #9 on: August 14, 2005, 06:40:31 PM » |
|
if no loss of power -definitely not the timing chain. i used to see that alot in my mechanic days and i remember it being the diverter valve pumping air into the exhaust from the air pollution pump.(remember you need oxygen for an explosion to occur. i may be wrong but i bet you got a pollution pump running on that. it could have also been created from a cracked distributor cap(you get a spark jumping to a cylinder that has the exhaust valve open sending the expolsion through to the exhaust. i am guessing its an 80's vintage rv, am i right?
|
|
|
|
|
Logged
|
|
|
|
|
Chuck_Norris
Guest
|
|
« Reply #10 on: August 14, 2005, 06:40:50 PM » |
|
It will be alot cheaper to check and repair the carb compared to the timing chain. I will start with that first. Thanks.
Give me a call I will tell you how to check for a loose timming chain (904)424-4127 |
|
|
|
|
Logged
|
|
|
|
|
Ida_Mann
|
|
« Reply #11 on: August 14, 2005, 08:22:02 PM » |
|
I got no advice for this, but that's freakin awesome.
Id@
|
|
|
|
|
Logged
|
Id@ M@nn www.facebook.com/IdaShotMe'99 Honda 400EX ATP'd (quietly making noise) '02 Honda Foreman Rubicon '00 Honda TRX90 8 X 20 Enclosed hauler/camper "Show me a smooth operation and I'll show you someone who is hiding mistakes, real boats rock." |
|
|
|
gery350
|
|
« Reply #12 on: August 14, 2005, 09:05:52 PM » |
|
after re-reading your symptoms-additional air going into your exhaust will not cause you loss of power(unless its causing your cat.conv. to heat up and clog)you can also perform a compression check. if your timing chain has jumped you will have low compression. if its at least 120 or higher on the cylinders than its prob. not the chain.
|
|
|
|
|
Logged
|
|
|
|
|
PureLogic
|
|
« Reply #13 on: August 14, 2005, 10:17:24 PM » |
|
Who Manufactured the chassis? Ford? Chevrolet? Dodge? What year model and what engine size?
|
|
|
|
|
Logged
|
|
|
|
|
bluesman
|
|
« Reply #14 on: August 14, 2005, 10:38:23 PM » |
|
yup its the chain  |
|
|
|
|
Logged
|
|
|
|
|
CABLEGUY1
|
|
« Reply #15 on: August 15, 2005, 10:37:48 AM » |
|
Who Manufactured the chassis? Ford? Chevrolet? Dodge? What year model and what engine size?
It's a 1986 Chevy 454 without cat converters just straight exhaust with mufflers. |
|
|
|
|
Logged
|
|
|
|
|
gtnwood
|
|
« Reply #16 on: August 15, 2005, 11:24:09 AM » |
|
Timing chain would be the most obvious response to your query however, it could also be somethin amiss in the valve train regardless of the timing chain.
|
|
|
|
|
Logged
|
'Political Correctness is a doctrine, fostered by a delusional, illogical minority, and
rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition
that it is entirely possible to pick up a turd by the clean end.'
(From a Texas A&M student)
2005 Kodiak 450, 26" 589s
|
|
|
|
bluesman
|
|
« Reply #17 on: August 15, 2005, 03:38:43 PM » |
|
DO A COMPRESSION TEST! IF A CHAIN JUMPS A TOOTH IT
WOULD MAKE IT RETARDED SO IF YOU HAD TO ADVANCE THE
DISTRIBUTOR TO MAKE IT RUN ITS NOT THE CARB..
|
|
|
|
|
Logged
|
|
|
|
ronny86250r
Full Member
 Offline
Location: desoto
Posts: 218
keeping up
|
|
« Reply #18 on: August 15, 2005, 03:55:14 PM » |
|
it was a bomb , one of those towel heads set you up |
|
|
|
|
Logged
|
|
|
|
|
PureLogic
|
|
« Reply #19 on: August 15, 2005, 07:12:50 PM » |
|
keith check the carb float. it maybe drip in the intake and filled the mufflers when fuel
Another check for this one is smell the oil. If it has a heavy gasoline scent or the oil is extremely thin like water this would also confirm the theory! |
|
|
|
|
Logged
|
|
|
|
|
CABLEGUY1
|
|
« Reply #20 on: August 15, 2005, 08:12:18 PM » |
|
After further inspection of the plug wires I can see where two of them were rubbing against the manifold and were pretty bad. I just did a compression check and every cylinder was 125 to 130 lbs. Someone said if the compression was good then it couldn't be the timing chain. Why? Couldn't it still have good compression even if it jumped time? Some one else suggested that I remove the belt for the pollution pump to rule out a vacuum problem.
|
|
|
|
|
Logged
|
|
|
|
|
gery350
|
|
« Reply #21 on: August 15, 2005, 09:13:47 PM » |
|
your compression is ok. if the timing chain jumped it would delay the opening of the intake/ exhaust valve hence causing lower compression.(in other words while the piston is on the upstroke the intake valve is not completely closed causing loss of compression). cableguy did you have to retard the timing to where it was originally after the repairs?
since you dont have a catalytic you could remove the pollution belt and/or plug the pollution manifolds which are mounted on the exhaust manifold.(just plug the port where the air hose goes into the manifold.)
oh and by the way, i was right on the vintage.
|
|
|
|
|
Logged
|
|
|
|
|
