Having problems after FLP install!!!!!!!!!!
Thread Starter
Staging Lane
Joined: Dec 2003
Posts: 59
Likes: 0
From: St. Louis
Having problems after FLP install!!!!!!!!!! I installed FLP LT's on my 00 Z yesterday. The car runs like total ***.. It feels alot slower. The problem that I am having is it is setting a p300(misfire) and EGR. I took the EGR off, so I know that is going to set the code. In all of the forward gears the cars shakes really bad from idle till about 2500rpms. At idle the car shakes like a cam with a 108 lsa and pops(like a backfire) every once in a while. I put new plugs and wires on the car during the header install. Any advice or help would be greatly appreciated. I wonder if I have one of those cars that needs a tune after header install?? Thanks
Sounds like a loose wire at the plug or coil pack,I would check that first.If you are now sure wires are good,I would pull the plugs make sure all were tight and no cracks in them.Installing headers should not cause a miss.
Make sure all the EGR fittings are sealed off tight.
Make sure all the EGR fittings are sealed off tight.
Originally Posted by SSCamaro99_3
He says that FLP had him put the rear O2 sensor in the front position because it is longer. He called me here recently.
Originally Posted by Snk Sknr
What did you do with your EGR and the AIR tubes? I put block off plates on mine.
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TECH Enthusiast
Joined: Feb 2003
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From: Austin, TX
Originally Posted by sr71blackbird
I bet you switched the coil packs. Meaning you put the drives side on the passeners and the Passeners on the drivers.
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it may be your o2 sensors The pcm is looking for a specific voltage from the rear o2 sensor that is different from the front o2 sensor. If it is different the pcm is confused and may try to compensate. It's best to use o2 simms on the rear o2 harness and use o2 cable extendors for the front o2 snsors.
Teching In
Joined: Apr 2004
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Originally Posted by SSean
IF that made a difference, which I doubt it would, then it wouldnt run at all. The computer is sending a signal through a certain wire to a certain location. It doesnt care which coil pack is there, as long as there is one there to deliver the spark
Switching one coil for another doesn't make a difference your right but changing the wireing order by switching the coil banks does.
And the Car did run.. with cylinders 5, 7, 8 misfiring over 5k times in the 2 days the guy was driving it. Also if you reved the motor the Mis would start to "feel" like it was going away but it wasn't...
Remember SSCamaro99_3 (Will) Kenny's car did this.. Oh by the way it's Dave..
Last edited by sr71blackbird; Apr 9, 2004 at 09:44 PM.
TECH Enthusiast
Joined: Feb 2003
Posts: 596
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From: Austin, TX
With cylinders 5,7, and 8 misfiring yes, the car would still run, but since he has a '00, the coil packs are mounted on a bracket, so I would assume he would just remove the bracket leaving the coil packs on the bracket. Therefore, to get them mixed up, he has coil packs 1,3,5 and 7 on cylinders 2,4,6 and 8, and vice versa, whch would mean none of the cylinders would be firing under your theroy. I could be wrong but in my expieriecne, swapping coil packs has never had any adverse affect 
but I've ony swapped one or two, trying to track down some other problems...
but I've ony swapped one or two, trying to track down some other problems... Teching In
Joined: Apr 2004
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He did remove the bracket leaving the coil packs on the bracket.the coil packs 1,3,5 and 7 on cylinders 2,4,6 and 8, were on the wrong sides but the motor did run.. I can only tell you what I witnessed and all he did was switch them and the car ran great.. As you said who knows but it somthing to try if nothing else works.
TECH Enthusiast
Joined: Feb 2003
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From: Austin, TX
Originally Posted by bbz
The pcm is looking for a specific voltage from the rear o2 sensor that is different from the front o2 sensor. If it is different the pcm is confused and may try to compensate. It's best to use o2 simms on the rear o2 harness and use o2 cable extendors for the front o2 snsors.
Thread Starter
Staging Lane
Joined: Dec 2003
Posts: 59
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From: St. Louis
Flp I didn't take the coil packs off the car. The only thing that I did different is I put the passenger side O2 in the front and put new plugs and wires on. I pulled a couple of plugs and the tips are white. Is this o.k? I have heard from 4 different people, 2 of which say that my problem is the O2 and 2 who have done the same thing and have had no problem with the car at WOT.
Thread Starter
Staging Lane
Joined: Dec 2003
Posts: 59
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From: St. Louis
No!!! The rear has the O2 simms and the header collecters have a front and a rear. I put the rear passenger in the passenger header, like I was told. Does that make sense???? I don't know why FLP would tell me that.
Originally Posted by Snk Sknr
No!!! The rear has the O2 simms and the header collecters have a front and a rear. I put the rear passenger in the passenger header, like I was told. Does that make sense???? I don't know why FLP would tell me that.
Perhaps the front and rear 02's are different on your year. On my '01 I called a local parts store and the front & rear are the same part number. I did the exact same thing you did.
TECH Enthusiast
Joined: Feb 2003
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From: Austin, TX
I dont think its a matter of the O2 sensors being different, but the information that the computer looks for comming from that specific location when the sensors send the data to the computer