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misfire after LG header install????

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Old Dec 10, 2004 | 06:43 PM
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Default misfire after LG header install????

Hello everyone, I finished up my LG install last night and took the car for a drive only to find that I have what I believe to be a misfire. While idling the car has a sychronized "arc" sound along with a "body rock". I checked for plug wire arcing yet was unsuccessful, checked all the connections on the coil packs, double checked the ground strap connection all with no luck. My O2's are run correctly and everyhting seems to be in check, but it idles rough, and when you get into WOT the car breaks up similiar to a rev limiter....

Any suggestions????

All help is greatly appreciated!
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Old Dec 10, 2004 | 06:46 PM
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Do you have an engine light on.
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Old Dec 10, 2004 | 06:56 PM
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Originally Posted by wavrdr
Hello everyone, I finished up my LG install last night and took the car for a drive only to find that I have what I believe to be a misfire. While idling the car has a sychronized "arc" sound along with a "body rock". I checked for plug wire arcing yet was unsuccessful, checked all the connections on the coil packs, double checked the ground strap connection all with no luck. My O2's are run correctly and everyhting seems to be in check, but it idles rough, and when you get into WOT the car breaks up similiar to a rev limiter....

Any suggestions????

All help is greatly appreciated!
Did you hear and feel 2 clicks when you put the plug wires to the coil packs?
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Old Dec 10, 2004 | 06:57 PM
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No CEL, and no pending codes. Could the car possibly be running that lean at WOT? what should I look for in my fuel trims?

TIA
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Old Dec 10, 2004 | 06:58 PM
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Originally Posted by gojo
Did you hear and feel 2 clicks when you put the plug wires to the coil packs?
I believe so, I'll doulbe check when it cools down a bit....
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Old Dec 10, 2004 | 08:54 PM
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UPDATE....... I checked the plugs/wires and seem to have somehow cracked a plug...For all those doing a header install remove your plugs!

I learned a good lesson.

Thanks for all the help you guys!
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Old Dec 10, 2004 | 09:48 PM
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Sage advice. Glad you found the problem. I remember the install of my KOOKS headers. Didn't have to remove all of the plugs, but did have to remove one on each side to get them past..
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Old Dec 10, 2004 | 09:48 PM
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I bet it looked just about like this!!

[IMG][/IMG]

[IMG][/IMG]
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Old Dec 11, 2004 | 01:38 PM
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It looked exactly like that! Thanks again guys!

Happy Holidays!
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Old Dec 11, 2004 | 02:33 PM
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did the driver side header go in ok . putting in a set right now and got the passanger side in from the top ok,just wondering if the driver side goes in that easy???? thks
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Old Dec 11, 2004 | 04:09 PM
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I found the drivers side to go in easier than the passenger side.

The driver slid in like butter form the bottom, while I opted to remove th valve cover and go from the top on the passenger and got hung up on the ac line, the air tube line, and the wiring harness....not that it was that difficult, but the driver side was so smooth....

Good luck!
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Old Dec 12, 2004 | 01:41 AM
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I had the exact same thing when I pulled my plugs for a header install... except I pulled them prior to installing..Weird!!
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Old Dec 12, 2004 | 08:55 AM
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Originally Posted by wavrdr
I found the drivers side to go in easier than the passenger side.

The driver slid in like butter form the bottom, while I opted to remove th valve cover and go from the top on the passenger and got hung up on the ac line, the air tube line, and the wiring harness....not that it was that difficult, but the driver side was so smooth....

Good luck!
good to hear,on my install the pass side header went in good from the top with valve cover off but did catch i wee bit on the starter.good to hear driver side goes in slick.thks,
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