![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
C/10 CLUB MEMBER
![]() Join Date: Jul 2003
Location: Lakewood, CA
Posts: 993
|
![]()
a popping like or back fire even though the carb? I have just replaced the carb thinking it may have been the problem but no luck. Any input would be appreciated so I can start making a list of what to go though and check.
thanks, Ron... ![]()
__________________
-Ron- ![]() |
![]() |
![]() |
![]() |
#2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
|
Timing, chipped intake valve, Timing chain jumping.
|
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: Sep 2004
Location: rochester NY
Posts: 777
|
Put a fuel pressure guage on it make sure your getting enough fuel . Compression test would help to . Its always best when you have a drivability problem to check the main things that make you engine run . fuel and spark .
|
![]() |
![]() |
![]() |
#4 |
Registered User
Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
|
Fuel-fouled spark plugs will do it.
|
![]() |
![]() |
![]() |
#5 |
C/10 CLUB MEMBER
![]() Join Date: Jul 2003
Location: Lakewood, CA
Posts: 993
|
I should also mention this only happen once you press the throttle some not at an idle. It was all of a sudden one day. It was running normal like usual and then pop! And it continues to do so.
__________________
-Ron- ![]() |
![]() |
![]() |
![]() |
#6 |
Registered User
Join Date: Mar 2002
Location: woodstock, alabama, usa
Posts: 938
|
i have seen situations where a sudden back firing problem would start,
and would be just off idle like that, (i can't explain why). it would have an odd sound to it, kinda like hitting the carb with a wrench. and it would turn out to be a broken rocker arm or a broken push rod. i can't explain why, this problem doesn't make the engine backfire at idle, but it doesn't. i don't know if thats your problem or not, but after you run into this a couple of times you can diagnose this problem from the sound the back fire makes. like i said it would sound like someone pecking on the carb with a wrench. hope that helps you. tony
__________________
i survived cancer and kidney stones, but my kids are killing me. |
![]() |
![]() |
![]() |
#7 |
English Chevy Owner
Join Date: May 2002
Location: Shropshire, UK/ Lot, France
Posts: 1,848
|
I had this happen to me a bunch of times and I'm pretty sure it was just a sticking valve. I used some carb cleaner down the barrels of the carb and followed up with some fuel system cleaner in a couple of tankfulls of fuel and it stopped. The truck wasn't used all that much at the time. Gotta be worth a try
__________________
Phil '67 C10 long fleet. 350/TH350, 4 bbl Carter, K&N, Dual exhaust, loads of stuff coming soon 2001 S10 Blazer Daily Driver, bone stock 4 door 4x4 with manual transmission |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Feb 2000
Location: Center City, MN, USA
Posts: 3,254
|
I have had that happen a couple of times in my truck. Every time I ended up pulling a cam out with a flat lobe. After the third time I pulled the engine.
__________________
'70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN |
![]() |
![]() |
![]() |
#9 |
Still drivin' a Rat Rod
Join Date: Sep 2004
Location: Monett Missouri
Posts: 4,925
|
Flat lobe or sticky valve or bad rocker arm/pushrod would be my guess also.At least that's where I would be looking first.Pull the valve covers,and crank it over,and watch the rocker arms to make sure they are all moving correctly.
__________________
Rusty Member #13872 Instead of saying.....you are a discomfort in the back of my front.....one should be able to say...... you are a pain in the *a$#* 71 GMC LWB 49 Chevy 85 Chevy G20 Check out my website |
![]() |
![]() |
![]() |
#10 |
Beer Power!!!!!!!!!!
Join Date: Nov 2003
Location: Nacogdoches, TX
Posts: 280
|
Points maybe???
__________________
Rather be fishin' |
![]() |
![]() |
![]() |
#11 |
C/10 CLUB MEMBER
![]() Join Date: Jul 2003
Location: Lakewood, CA
Posts: 993
|
I was leaning towards a valve or something myself, but im not sure. Thanks for all the input it gives me some good places to start looking.
__________________
-Ron- ![]() |
![]() |
![]() |
![]() |
#12 |
Senior Member
![]() ![]() Join Date: Jan 2005
Location: CA
Posts: 5,535
|
Did you ever get this problem fixed? I'm having a similar problem.
|
![]() |
![]() |
![]() |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|