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Author Topic:   Back Fire
Dirt Maniac

Total posts: 161
posted March 03, 2003 07:15 PM
I just got my new motor running today and after it warmed up it started to shot fire out the headers what may be causing this??????? need to know by Sat. since it is my First pratice in a new car. The car is a GRT not an Eagle that I am still waiting for.


Aaron Downing

3D IMCA Modified

Dirt Forum Champ
Total posts: 1565
posted March 03, 2003 09:32 PM UIN: 54865418
check your plugs and see what they look like sounds like a rich condition to me and after the headers came up to temp was igniting the unburnt fuel that had collected in them

Dirt Maniac

Total posts: 161
posted March 03, 2003 10:01 PM
plugs look a lil grayish. this is a gas motor. and it is also has a hyd. cam. i've been told every thing from valves to carb not adjusted right to timing. Would a vacume cause this problem also??????????

Dirt Full Roller

Total posts: 74
posted March 04, 2003 12:18 PM
First things first look at your timming and seeif it is 34 to 36 degrees (Whats your compression ratio) No a vacum leak wouldnt cause that it would cause it to run lean becasu it would get to much air and not enough fuel I would bet that your to rich an dit is washing the color off what carb is it and what heat range are you using if your are running ti hot of plug it will cause the plug to pre detonate your fuel on entry when the cam overlaps from exhaust to intake your plug hasnt cooled down yet and is still trying to burn try 2 heat ranges down
Let me know if anything works if not we will figure something out

[This message has been edited by iowa_dirt_track_girl (edited March 04, 2003).]

Dirt Maniac

Total posts: 161
posted March 04, 2003 05:07 PM
thanks to all who replied i have fixed the problem. it was my vavles were off and timing was off 4 degrees to break the motor in.

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