xxRONNIExx

I finally finish installing the LPP headers last night and fired it up this mourning. I was getting crazy backfiring noise. Im thinking maybe I have the a spark plug wire or two in the wrong place...or could it be any of these options:

*I took the ERG off but don't have my block plates on yet
*NO Y pipe installed just the headers with the o2 sensors

My friend said he actually saw sparks shoot out these exhaust under the car when i started it up

Anything else that may cause all this back firing?

wrd1972

iTrader: (12)

Almost always a wire on wrong or one damaged.

TheTransporter69

iTrader: (5)

i don't think your suppose to hook your 02s up if u run with open headers to much fresh air right there

wrd1972

iTrader: (12)

/\ excellent point.

RamAir95TA

iTrader: (2)

If the headers aren't ceramic coated you shouldn't have a problem with the O2s.

And it is very likely you are burning a wire, spark plug isn't fully seated, or a wire is crossed.

xxRONNIExx

Okay thats what Im thinking as well (spark plug or wiring problem)...Been doing this for 2 days now. Im too sore to hop on top of that think again. Maybe tomorrow.

xxRONNIExx

So too much air could cause back firing?

TheTransporter69

iTrader: (5)

im not sure about back firing, but i read on here that it wont run right or something along those lines. you could try unhooking them and running it see if it still backfires just to eliminate the possibility. Its probably more related to plugs though like everyone else is saying.

bigj2717

iTrader: (15)

I ran my car with open headers and it was fine but yes too muh cold air coming back in can mess them up. The first thing I would do is check the plug wire make sure there in the right place and non got burnt also. Plus you need to put get block off plates for the egr that's not going to help anything. And yes flames shooting out the headers is normal when there is no exhaust on there

946spdz

iTrader: (19)

I actually fried my opti in the process of swapping out headers somehow!! my car was backfiring when i started it up w/ the new headers.. i spilled coolant on it im pretty sure.. but yea TRIPLE check ur wires make sure theyre right...

04gtoBMXracer

iTrader: (26)

You said you removed your egr but don't have block off plates on??

Spartan7

iTrader: (7)

Well, that's an intake leak to add to your problems.

The only thing about running open headers is that the O2's are closer to fresh air and their readings will be off. You'll burn rich in closed loop. But it shouldn't cause backfiring. I drove mine for a week with open headers.

04gtoBMXracer

iTrader: (26)

I'm guessing the headers don't have egr ports? If they do I hope those aren't the plates you're talking about haha

bigj2717

iTrader: (15)

No i think he's talking about the block off plates on the back of the intake

xxRONNIExx

Yep thats what Im talking about

bigj2717

iTrader: (15)

Yeah well you need to get those and check your plug wires and once that's done I'll bet everything will be back to normal

69gto96z

iTrader: (13)

Couldn't have said it better

WARDOG

Theres your problem right there. Good luck and get those plate ASAP