Big back fire!

[96sunman]

Hi everyone I have a problem, after I had the BANKS installed in my 1996 460 motorhome at camping world, I been having a big back fire!! I took it back to camping world and they don,t no way??? because it doesn't back fire when I take it there?? I can drive like 500 mile with out a back fire and then out of no were bangggggg!!! So that the thing it douse not do it all the time??I change the cap plugs and wires but no luck.......

[gasser 38]

Contact Banks directly 888-839-5600 they may be able to give you some Tech support they sell thousands of these and I am sure have delt with this before

[96sunman]

Thanks for the info I well call and see.

[96sunman]

Well I called them but they say I have call camping world??? that's just it they don't no way??

[Slang]

I had this happen to me. In my case it ended out being the fuel presure regulator, the diaphram leaked fuel through the vacuum line to the #6 cylider. Key off, motor cool, It's has three allen bolts, It's chrome and on the drivers side.

Hope this helps

[subford]

Could also be an air leak where it bolts to the head.
I had a cracked Manifold do that.
Without air it cannot make a big bang.
But you are getting too much unburned fuel into the exhaust also.
So you could have a bad FPR like Slang said above.

[96sunman]

Thanks guys but how would i no if the headers are leaking?? I am thing it leaking at the headers but not sure? I did fine a couple lose bolts??? but still back fires..