Author Topic: Back fire  (Read 2136 times)

Offline Redneckchevy

  • Junior Member
  • ***
  • Posts: 697
    • Photo Bucket
Back fire
« on: April 07, 2006, 10:25:00 PM »
Just bought new plugs new wires new dist cap and coil pack.new pcv valve. all new fuel lines new vac lines...And its all seald real good no leaks ...its all on right...And i have no emsion stuff ...So any one no y i got a back fire? and o yea its only after i left off the gas ... i think it might be the dist gear...??? ...Its a 1986 k10 4x4 with the V6 4bbl setup  

Edited by: Redneckchevy at: 4/7/06 9:27 pm
1986 Chevrolet K10 Swb "Women love the hood scoop"
1997 Chevrolet K10 Lwb "Dunno what women love"

Offline DnStClr

  • Senior Member
  • ****
  • Posts: 1809
Re: Back fire
« Reply #1 on: April 17, 2006, 04:46:00 PM »
Too much unburned gas in the exhaust system is a usual culprit. The fuel ignites in the hot exhaust.
Another cause can be oxygen entering the exhaust system by means of a leak in the pipes someplace.

Don
87 Chevy Silverado

Offline Z28 c10

  • Registered Users
  • *
  • Posts: 174
Re: Back fire
« Reply #2 on: April 19, 2006, 09:27:00 PM »
Have you plugged off the air injection lines going to your exhaust manifolds?? I had the same problem on my 4.3 S10 when I opened up the exhaust, between every shift and during downshifting it would be a non-stop backfire. pulled the air injection off of the exhaust manifold and plugged the holes and the backfire disapeared.

 JayTater

 Z28 C10  


Offline Redneckchevy

  • Junior Member
  • ***
  • Posts: 697
    • Photo Bucket
backfire
« Reply #3 on: April 22, 2006, 03:47:00 AM »
yep that worked out fine i pluged the oped lines and it stoped  thanks

1986 Chevrolet K10 Swb "Women love the hood scoop"
1997 Chevrolet K10 Lwb "Dunno what women love"

Offline Z28 c10

  • Registered Users
  • *
  • Posts: 174
Re: backfire
« Reply #4 on: April 22, 2006, 01:16:00 PM »
happy to help.

 JayTater

 Z28 C10