Notices
GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Header install .. now misfire codes are thrown

Thread Tools
 
Search this Thread
 
Old 11-08-2003, 06:38 PM
  #1  
TECH Senior Member
Thread Starter
iTrader: (1)
 
Flyer's Avatar
 
Join Date: Jan 2003
Location: Armpit of East TX
Posts: 9,342
Likes: 0
Received 0 Likes on 0 Posts
Default Header install .. now misfire codes are thrown

wtf ... ?

I ran it some, enough to heat up the gaskets and water, for a little while. I was also enjoying the open header sound for a little bit, take off to drive and now it's missing like a SOB!

Any ideas ?

I haven't checked the wires yet, it seems like it's mostly bank2 being 2, 4, and 6 mainly with an occasional 8. The other side isn't worth mentioning.
Old 11-08-2003, 07:15 PM
  #2  
? ? ? ? ? ?
iTrader: (16)
 
BigTex's Avatar
 
Join Date: Nov 2001
Location: East of Dallas
Posts: 7,126
Likes: 0
Received 2 Likes on 2 Posts
Default

Did you pull the plugs during the install? I bumped my plugs when I put my headers on my previous truck and had a bunch of misfires and blinking SES lights because of it. I replaced all the plugs and had no problems after that.
Old 11-08-2003, 07:25 PM
  #3  
TECH Senior Member
Thread Starter
iTrader: (1)
 
Flyer's Avatar
 
Join Date: Jan 2003
Location: Armpit of East TX
Posts: 9,342
Likes: 0
Received 0 Likes on 0 Posts
Default

I didn't pull the plugs out, but I did pull the wires off. I'm going to the parts store tomorrow to pick up another set of NGK TR55's.

I don't wanna replace wires yet, but if I have to, it's going to wait until I get some Taylor wires in or something.

Still no rain here either ..

I cross-threaded a header bolt when I did the install too. It was a major PITa to get it in. it was the one in the very back on driver's side. After getting it half way in with a wrench I could finally get a socket on it and get all of 2 clicks at a time.

I may be putting heads on here sooner than I wanted to ...
Old 11-08-2003, 08:55 PM
  #4  
TECH Fanatic
iTrader: (7)
 
rgvsierra's Avatar
 
Join Date: Jul 2002
Location: RGV, Texas
Posts: 1,482
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Flyer
I didn't pull the plugs out, but I did pull the wires off. I'm going to the parts store tomorrow to pick up another set of NGK TR55's.

I don't wanna replace wires yet, but if I have to, it's going to wait until I get some Taylor wires in or something.

Still no rain here either ..

I cross-threaded a header bolt when I did the install too. It was a major PITa to get it in. it was the one in the very back on driver's side. After getting it half way in with a wrench I could finally get a socket on it and get all of 2 clicks at a time.

I may be putting heads on here sooner than I wanted to ...
heh, i crossthreaded the exact same bolt when i changed gaskets th second time..
Old 11-08-2003, 09:19 PM
  #5  
? ? ? ? ? ?
iTrader: (16)
 
BigTex's Avatar
 
Join Date: Nov 2001
Location: East of Dallas
Posts: 7,126
Likes: 0
Received 2 Likes on 2 Posts
Default

No rain??? That sucks. It hasn't stopped raining here yet.
Old 11-08-2003, 09:22 PM
  #6  
11 Second Club
 
Texas Terminator's Avatar
 
Join Date: Jul 2002
Location: Beaver Falls, PA
Posts: 1,424
Likes: 0
Received 0 Likes on 0 Posts
Default

!#()$&!@#& RAIN!!!!! finally get the new motor in and now i can't drive it!!!
Old 11-08-2003, 10:35 PM
  #7  
single digit dreamer
iTrader: (6)
 
parish8's Avatar
 
Join Date: Mar 2002
Location: omaha ne
Posts: 9,743
Likes: 0
Received 2 Likes on 2 Posts
Default

you dont have open headers now do you? my truck barely ran with open headers. the 02's must be too close to the opening.
Old 11-08-2003, 10:53 PM
  #8  
11 Second Club
 
Texas Terminator's Avatar
 
Join Date: Jul 2002
Location: Beaver Falls, PA
Posts: 1,424
Likes: 0
Received 0 Likes on 0 Posts
Default

hey parish, glad you mentioned that. i am about to install my ASM's and was considering dumps. what happened? what if i used dumps at the collector? does the A/F go way lean or what?
Old 11-09-2003, 12:12 AM
  #9  
single digit dreamer
iTrader: (6)
 
parish8's Avatar
 
Join Date: Mar 2002
Location: omaha ne
Posts: 9,743
Likes: 0
Received 2 Likes on 2 Posts
Default

seems like you need the 02's 12" from the opening, i am not sure of that info so maybe someone else will chime in, you can put a dump right where the cat's are but i would put an extention on the dump or do whatever you have to to get far enuff away. i only drove the truck about 10 miles and the first couple were fine then it started missing, i think it went way rich but i am not sure
Old 11-09-2003, 01:39 AM
  #10  
TECH Fanatic
iTrader: (1)
 
sleepersilverado's Avatar
 
Join Date: Jun 2002
Location: Houston,Tx
Posts: 1,843
Likes: 0
Received 0 Likes on 0 Posts
Default

yea i heard like you needed like atleast 8" added on past the 02's.
but like parish i am not sure. i drove mine and it missed but it was cause the comp heeded tunning realy bed. you could not even get half throttle.


Quick Reply: Header install .. now misfire codes are thrown



All times are GMT -5. The time now is 07:03 PM.