POST LG Pro LT install Questions
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
POST LG Pro LT install Problems
Hi All,
I recently finished up installing a set of LG Pro LT's with off road pipes - full exhaust - x-pipe and everything.
I have a '03 Z06.
After the first start, I went for a test run.
The first half hour the car drove well - I wasn't pushing it - just wanted to drive around and get all of the smoke out from the new pipes.
The second half hour of driving it - the car started backfiring at low RPM. Either while its idling or when I am at a stop sign and about to start out in 1st gear. When I am above 1000 or so RPM it does NOT backfire.
The car's motor also jerks a little at speed when in gear and I am applying gas. It stops this when I let off the accelerator.
I have the rear O2 sensors plugged into the front sockets w\the LG supplied adapters. I have O2 sims where the rear O2 sims once plugged into the wiring harness.
I have the right side O2 sensor going to the right side header and I have the left side O2 sensor going to the left header....which i confirmed today is correct with LG.
What am i doing wrong? Why is my car backfiring at low RPM. Why does the motor jerk\hesitate when accelerating?
WTF? is going on???? THANKS GUYS!!!
ALSO - I have ZERO Codes on the DIC.
I recently finished up installing a set of LG Pro LT's with off road pipes - full exhaust - x-pipe and everything.
I have a '03 Z06.
After the first start, I went for a test run.
The first half hour the car drove well - I wasn't pushing it - just wanted to drive around and get all of the smoke out from the new pipes.
The second half hour of driving it - the car started backfiring at low RPM. Either while its idling or when I am at a stop sign and about to start out in 1st gear. When I am above 1000 or so RPM it does NOT backfire.
The car's motor also jerks a little at speed when in gear and I am applying gas. It stops this when I let off the accelerator.
I have the rear O2 sensors plugged into the front sockets w\the LG supplied adapters. I have O2 sims where the rear O2 sims once plugged into the wiring harness.
I have the right side O2 sensor going to the right side header and I have the left side O2 sensor going to the left header....which i confirmed today is correct with LG.
What am i doing wrong? Why is my car backfiring at low RPM. Why does the motor jerk\hesitate when accelerating?
WTF? is going on???? THANKS GUYS!!!
ALSO - I have ZERO Codes on the DIC.
Last edited by DDNZ06; Jul 21, 2007 at 04:59 PM.
Race Director
Joined: Mar 2007
Posts: 18,308
Likes: 21
From: Marlton. Increasing performance one speeding ticket at a time! NJ
I am not an expert by a long shot, but I know that headers can suddenly make you start running lean. A good tune should take care of that for you. Just my thoughts, maybe one of the experts will chime in here.
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
I've had 3 people tell me just the opposite - Headers = Rich condition...
I'm not an expert either....thankfully there are forums like this...
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
More Info....
I did remove the plugs and wires to do the header install. Typical procedure when doing this mod.
I don't think there is anything wrong there. The motor runs smooth. Plus if I did mess something up when reinstalling wouldn't I have a code about it??
Just thought this was worth mentioning because - I had someone tell me that could be the problem when I describe the motor hesitation\backfiring....
thanks. HELP????
I don't think there is anything wrong there. The motor runs smooth. Plus if I did mess something up when reinstalling wouldn't I have a code about it??
Just thought this was worth mentioning because - I had someone tell me that could be the problem when I describe the motor hesitation\backfiring....
thanks. HELP????
Pro
Joined: Sep 2005
Posts: 538
Likes: 9
From: Geneva, IL Bring back the Chief!
St. Jude Donor '06-'07-'08-'09-'10,'13-'14,'19-'20-'21-'22
Oh , I forgot.
I had a similar problem.
Are you ABSOLUTELY SURE that you got the O2 sensor wiring right? When I did my headers I thought I had it right, and then when I took them off, I noticed that I had wired incorrectly.
I had a similar problem.
Are you ABSOLUTELY SURE that you got the O2 sensor wiring right? When I did my headers I thought I had it right, and then when I took them off, I noticed that I had wired incorrectly.
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
Sounds like you installed the headers correctly - rear 02s moved to the front position, while placing 02 sims in the rear, while keeping your wires left-to-left and right-to-right. However, I would doublecheck your wires to ensure they're not criss-crossed once more, and re-check your spark plugs and wires since you may have damaged a plug during the install while installing a header (unless you removed them all first) or have a loose plug wire(s).
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
Thank you for your reply’s
bennettrp - AlohaC5,
O.K. Just crawled out from underneath a rock - I mean my car....
I have now double checked my wires. Everything is going left to left and right to right.
The 2 O2 sims are in the square connector in the wire harness and the cables for the O2 sensors (which are square - I used the LG square to flat round adapter) are plugged into the flat connectors on the wiring harness.
I think I am good with the O2 wiring and sims. I will now lower the car and double check plug wires. I did remove plugs and wires before removing stock manifolds.
anybody have any other thoughts...
HELP!!!
O.K. Just crawled out from underneath a rock - I mean my car....
I have now double checked my wires. Everything is going left to left and right to right.
The 2 O2 sims are in the square connector in the wire harness and the cables for the O2 sensors (which are square - I used the LG square to flat round adapter) are plugged into the flat connectors on the wiring harness.
I think I am good with the O2 wiring and sims. I will now lower the car and double check plug wires. I did remove plugs and wires before removing stock manifolds.
anybody have any other thoughts...
HELP!!!
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
Check your Ground wires near the headers to see if they're loose. I believe there are 2. I think someone actually posted pics of the ground wires in a header thread on this forum.
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Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
AlohaC5,
When I push the plug boot onto the spark plugs - should I feel anything. All I did was push on the boot and then try tugging back - if it didn't pull out - I assumed everything is good.
Thanks.
When I push the plug boot onto the spark plugs - should I feel anything. All I did was push on the boot and then try tugging back - if it didn't pull out - I assumed everything is good.
Thanks.
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
thanks.
"AlohaC5" Senior Member
Joined: Jun 2003
Posts: 3,562
Likes: 44
From: Madison, AL
Clear any codes you may have in the DIC and check the 02 wires for any heat damage that may have occured after your install and first half hour of driving. They should be tucked behind the heat shield away from the headers. I can't think of any other troubleshooting ideas. Were any other mods made at the same time as the header install?
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
Clear any codes you may have in the DIC and check the 02 wires for any heat damage that may have occured after your install and first half hour of driving. They should be tucked behind the heat shield away from the headers. I can't think of any other troubleshooting ideas. Were any other mods made at the same time as the header install?
I did check the wires themselves right now also. I used a shielding material when i did the whole header install. My starter got wrapped and various cables with this stuff. Anything near the headers was wrapped with this stuff.... i really tried doing a nice clean install to minimize issues.....
This stuff is great. It is very pliable and has a very sticky back. I used it to wrap the O2 sensors and sims. I used it on the starter housing. I used it on the starter wires. Where ever it looked like some thing was to close to the header tubes - I applied this stuff. ***IMPORTANT*** I also wrapped the clutch line on the drivers side. If this catches on fire - your car is toast. Just some advice that was given to me from a friend.
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
Pull all your ignition wires and inspect them. You may have had one leaning against the headers and burned through.
When you put them back on the coil wire should snap (click) twice. the spark plug end once, but it's very hard to feel.
When you put them back on the coil wire should snap (click) twice. the spark plug end once, but it's very hard to feel.
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
To all of those that replied - Thank You.
All,
I have been out driving my machine....
Let me walk you through what i discovered this morning....
So - I'm under the car again double checking that I have the O2 wires correctly positioned.
I'm thinking what the F^&K could be my next move....
I slide up to the front of the car on my creeper - and look up on the driver side. I can clearly see all the plug boots for the spark plugs. I notice the one on the driver side nearest to the fire wall...
I see the tip of the spark plug and the spring around it from the plug boot.
SOOOOOOO - I'm like thats not right.
I lower the car and remove the AIR tube and tug on it a little - it came right off...
SO I push on it real good and put everything back together - start it up - ZERO LOW RPM BACKFIRE - Drive it around for the next 40 minutes and it RUNS LIKE A CHAMP!!!!
I am so happy at this point:
1. I did the install myself
2. I put it all back together without any problems
3. I trouble shooted it myself and fixed it
The car sound mean!!!!
Now I'm charging up the camera to make a vid...
THANKS ALL!!!
I have been out driving my machine....
Let me walk you through what i discovered this morning....
So - I'm under the car again double checking that I have the O2 wires correctly positioned.
I'm thinking what the F^&K could be my next move....
I slide up to the front of the car on my creeper - and look up on the driver side. I can clearly see all the plug boots for the spark plugs. I notice the one on the driver side nearest to the fire wall...
I see the tip of the spark plug and the spring around it from the plug boot.SOOOOOOO - I'm like thats not right.
I lower the car and remove the AIR tube and tug on it a little - it came right off...
SO I push on it real good and put everything back together - start it up - ZERO LOW RPM BACKFIRE - Drive it around for the next 40 minutes and it RUNS LIKE A CHAMP!!!!
I am so happy at this point:
1. I did the install myself
2. I put it all back together without any problems
3. I trouble shooted it myself and fixed it
The car sound mean!!!!
Now I'm charging up the camera to make a vid...
THANKS ALL!!!
Last edited by DDNZ06; Jul 22, 2007 at 03:31 PM.
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
Another question
Well - that explanis why my car ran well the first half hour after the Header install and ran rough the next half hour..... The spark plug boot popped off.
Is there anything I can buy thats better out there? I was thinking of doing new wires and boots - maybe something that's better than the factory plug boots????
Or should I just shut up and go drive my beast....
Is there anything I can buy thats better out there? I was thinking of doing new wires and boots - maybe something that's better than the factory plug boots????
Or should I just shut up and go drive my beast....
Last edited by DDNZ06; Jul 22, 2007 at 03:30 PM.
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL
But you are correct. Had I rechecked my plug connections 2 days ago - I would have found the prob then.....
Thanks!!
Melting Slicks
Joined: Mar 2005
Posts: 2,252
Likes: 181
From: NE OH
Well - that explanis why my car ran well the first half hour after the Header install and ran rough the next half hour..... The spark plug boot popped off.
Is there anything I can buy thats better out there? I was thinking of doing new wires and boots - maybe something that's better than the factory plug boots????
Or should I just shut up and go drive my beast....
Is there anything I can buy thats better out there? I was thinking of doing new wires and boots - maybe something that's better than the factory plug boots????
Or should I just shut up and go drive my beast....
Thread Starter
Le Mans Master
Joined: Feb 2006
Posts: 5,083
Likes: 35
From: Chicago IL