Just got done installing my headers and it kinda runs like crap now. First off it is open header until I can get to an exhaust shop. Not to sure if this is why, but I think it might have something to do with it. I havent had a chance to check the plugs/wires so cant rule that out. Also the rear o2's are not plugged in, nor do I have sims on it. The check engine light is also flashing. Any help will be appreciated.

 

Yes. Get some form of exhaust.

 

Yeah thats what I thought. I thought about it to late, but I should have put the y-pipe on and just moved the I-pipe out of the way.

 

I'd highly suggest to check the plugs and wires. Not having the rear O2's will definitely throw a code, but it won't make the SES light flash on and off. It almost sounds like some of the wires aren't connected.

 

blinking SES means Missfire. Get some new plugs and check the wires. It doesn't take much to hit a plug during a LT install and crack the porcelain on the plug.

 

How did you do the install? through the top or bottom. I saw a write-up on here were they explained how to install Mac Mids from the top, but it requires removing the coil packs, if so, check the connector. I had it come loose on me once and the same thing happened.

Just a suggestion.

 

Thanks for the reply's. I replaced the plugs with the headers and i didnt have them in when i put them up. I'll double check the plug wires, i did have a hard time putting them back on.

 

Still sounds like you cracked a plug, maybe during tightening the plug. Its happened to me a few times.

 

I'll be pissed if I cracked a plug. Where can buy ngk's at?

 

Autozone or advanced auto. TR55's are stock# 3951 and TR6's are stock# 4177

Not like NGK's are some special plug or something.

 

I know, but the auto zone's by me dont have them.

 

i had the same problem after my install....im just retarded and left 1 wire off a plug. if you have access to a scanner it will tell you which cylinder it is thats misfiring too.

 

Advanced Auto in my are doesnt have them. Try Car Quest, or just order them.
Also i installed my plugs after i did the headers, might be easier?

 

Yeah I'm going to have to take it to autozone after work and check it out.

 

Pull all your wires off and make sure they click twice when you put them back on. I developed a misfire about 500 miles after my LT install because the wire had just wiggled its way off of the plug. I just took them all off and put them back on with a little bit of die electric grease and car has been running fine for over 8K miles now.

 

Okay now i just feel dumb as hell. When I put it back together i put the plugs and wires on before i put the oil dipstick tube back in. When I put it back in i disconnected the number 4 wire, and didnt put it back on. What a dumb ***. Thanks for all your help though.

 

Oh yeah the check engine light is gone now too. I guess whoever had the car before had already tuned out the o2's, cause they werent even on.

 

At least its all good now.

 

you should change youe o2 sensors. i had the same exact problem yesterday after my install. i went to autozone and got some bosch 13111 o2's and it runs great today! hope this helps.

 

You got that right.