Headers installed, Now i have engine misfire code??
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Headers installed, Now i have engine misfire code??
I got done putting in my FLPs and I think the reason the car was running bad before and still is, is because of the code P0300- engine misfire. I had the rear O2s pugged in and those codes went away but the check engine code is still there. I have the stock plug wires on the car and it looks like the rubber by the metal jacket might be touching the header. Could that be the problem. What else could cause the misfire? Thanks guys. :cheers:
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Headers installed, Now i have engine misfire code?? (Buckmaster)
The headers are on there very secure. Would a leak cause a misfire. I thought it was the plugs since my dads car(84 Lincoln) just got a tune up and a cracked spark plug was installed and it ran very bad also. I didnt take out the plugs though only the wires and I only have 5500 miles on the car.
Racer
Joined: Jan 2002
Posts: 397
Likes: 0
From: Naperville IL
Re: Headers installed, Now i have engine misfire code?? (kh24)
Joe,
I have yet to see any problems using the stock wires. Check to make sure they are on all the way and that you get 2 clicks when putting them in the coil paks. If all is well there check to see which cylinder it is and check the plug and ohm the wire to make sure those are good. Also check under the hood in the dark, and unplug your hood light, check that cylinder. You will be able to see the spark if it is transfering, If so, I would use MSD's they are a great wire and are far away from everything. If all that is good, check the main connection at the coil pak, or even a pinched wire when putting the coilpaks back on. One last thing to check is the groung wires on the block, on the drivers side(or both if you removed them on the passenger side) make sure they are on and tight. Usually this will cause the car to start and die, however if it is loose or laying on the frame, it could cause that problem. Those are the only things I can think of that would change just from a header install. Let me know how it goes.
Dan
FLP
I have yet to see any problems using the stock wires. Check to make sure they are on all the way and that you get 2 clicks when putting them in the coil paks. If all is well there check to see which cylinder it is and check the plug and ohm the wire to make sure those are good. Also check under the hood in the dark, and unplug your hood light, check that cylinder. You will be able to see the spark if it is transfering, If so, I would use MSD's they are a great wire and are far away from everything. If all that is good, check the main connection at the coil pak, or even a pinched wire when putting the coilpaks back on. One last thing to check is the groung wires on the block, on the drivers side(or both if you removed them on the passenger side) make sure they are on and tight. Usually this will cause the car to start and die, however if it is loose or laying on the frame, it could cause that problem. Those are the only things I can think of that would change just from a header install. Let me know how it goes.
Dan
FLP
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Headers installed, Now i have engine misfire code?? (FLP)
I got 2 clicks when i put em in. I did not remove the ground wire but i did put in the both headers from the top and that could have hit something. I only had to remove the steering shaft to put in the drivers side header. It cleared the filter fine and all i had to do was unmount 2 bolts on the alnt. to get it in there. I know the headers are not causing the misfire but i thought that maybe the extra heat created by them could be causing a spark problem. The wires look fine but maybe i dont have them pushed onto the plug far enough. I pushed them on very hard and they are securely in there but i dont get an audible click like on the coilpaks. Thanks for your help Dan. Did you get my old set back ok. I couldnt figure out how to pack it like you guys did. Oh and also my X pipe flanges where the exhaust hooks up were not threaded like the factory H pipe. Is that normal for the x pipe and how should i put on the exhaust(just stick a nut behind it i guess)
C5noir: thanks for your help and I'll be contacting you shortly for some amsoil(i just switched over in the engine and I have been running about 10 degrees cooler at the track)
C5noir: thanks for your help and I'll be contacting you shortly for some amsoil(i just switched over in the engine and I have been running about 10 degrees cooler at the track)
Safety Car
Joined: Jan 2000
Posts: 4,965
Likes: 0
From: Midlothian, VA
Re: Headers installed, Now i have engine misfire code?? (kh24)
Damn, you're the man if you got the driver's side header in w/out removing the oil filter, that's cool. Did you make sure the little screw-on caps to the spark plugs were on there tightly? Pull all the wires off, make sure the spark plugs are all tight ~18 lb-ft. Look at the wires to make sure they're not burnt, frayed, etc. If they're fine, re-install them all and make sure they seat and click.
Whenever you want the Amsoil, give me a shout.
Whenever you want the Amsoil, give me a shout.
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Headers installed, Now i have engine misfire code?? (C5Noir)
I first tried putting in the drivers header from the bottom but it was way too tight. I tried from the top and it took a lot of moving to get the bellhousing flange around the filter but it could be done again. I then had the header stuck but i took a towel and wrapped the header and tapped it down with a hammer and it fell right into place(I had a UPF 44 filter on which i think is a bit smaller(shorter) than the PF44.)
What are the screw on caps to the plugs? I didnt screw anything back on. I pushed the little metal jacket with the spring on it into the spark plug. Did i do something wrong(would be the first time...i'm an idiot and i cant thank you guys enough for your help) :cheers:
What are the screw on caps to the plugs? I didnt screw anything back on. I pushed the little metal jacket with the spring on it into the spark plug. Did i do something wrong(would be the first time...i'm an idiot and i cant thank you guys enough for your help) :cheers:
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Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Headers installed, Now i have engine misfire code?? (Ryan2002C5)
I think i found the problem. First are the coil packs side specific cause i might have mixed them up, but second it looks like a coil pack might have hit the header a little and looks a little toasted. That might very well be the problem. Does anyone know the price of those things....I might have to have the dealer look at it. Thanks guys.
Safety Car
Joined: Jan 2000
Posts: 4,965
Likes: 0
From: Midlothian, VA
Re: Headers installed, Now i have engine misfire code?? (kh24)
I think i found the problem. First are the coil packs side specific cause i might have mixed them up, but second it looks like a coil pack might have hit the header a little and looks a little toasted. That might very well be the problem. Does anyone know the price of those things....I might have to have the dealer look at it. Thanks guys.
[Modified by C5Noir, 11:10 AM 7/9/2002]
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Headers installed, Now i have engine misfire code?? (C5Noir)
I left the colipacks unbolted one time when i moved the car and it hit against the header. It might just be the wires but im gonna check everything out now. I looked last night and the spark was not transfering. Here is a pic of the coilpack. Sorry my hands where a little shakey.
Safety Car
Joined: Jan 2000
Posts: 4,965
Likes: 0
From: Midlothian, VA
Re: Headers installed, Now i have engine misfire code?? (kh24)
Yeah, you may have a bad coil pack. Do you have a buddy with a C5 you could swap on his coil pack to see if that alleviates the problem? That would be the easiest way. But yes, that doesn't look very good to me. Was the spark not transfering on just that burned coil?
[Modified by C5Noir, 11:38 AM 7/9/2002]
[Modified by C5Noir, 11:38 AM 7/9/2002]
Racer
Joined: Jan 2002
Posts: 397
Likes: 0
From: Naperville IL
Re: Headers installed, Now i have engine misfire code?? (kh24)
Joe,
Yes we did get them back, and have found the packaging problem! The x-pipe is not threaded like the factory pipe, just a bolt and nut is needed. Sounds like you have found your problem, let us know.
Dan
FLP
Yes we did get them back, and have found the packaging problem! The x-pipe is not threaded like the factory pipe, just a bolt and nut is needed. Sounds like you have found your problem, let us know.
Dan
FLP
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: Headers installed, Now i have engine misfire code?? (kh24)
I would change out the stock wires in any case. The cabon filiment wire has a tendency to break. Particularly if you tug on the wire and not the boot. I've had them drive me nuts because they sometimes only missfire when they are hot.
[Modified by jfpilla, 6:34 PM 7/9/2002]
[Modified by jfpilla, 6:34 PM 7/9/2002]
Thread Starter
Drifting
Joined: Aug 2001
Posts: 1,903
Likes: 0
From: Oakhurst NJ
Re: Headers installed, Now i have engine misfire code?? (FLP)
I found the problem. The coilpacks are fine and they all tested good. No code was thrown by a coilpack. The problem seems to be with the stock wires. It is very hot in under the hood and the heat shield was making some contact with the header. I called LAPD and they told me to wire tie the wires away and order some MSD wires like you said. This should solve the problem. I am gonna put the car on an OBDII scanner tomorrow also(the service station across from my store has it and will let me use it) and that should tell me where the misfire has been comming from but It seems to be plug wires now. Oh i took them out again today and put them back in real tight and the misfires where only like 1 ever 5-10 minutes. Thanks to everyone for there help and thanks to FLP for getting this very well made set of headers out to me so quickly. :cheers:
