baqd spark plug wire = lean a/r
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
baqd spark plug wire = lean a/r
i havent received my truck wires yet so car isnt running properly.
my a/r are jumping all over the place normal then real lean ect ect ect
i wouldnt think that bad wire would cause lean but it does.
i need my frickin wires
ill havem tuesday got the bosch 420 pump installed and its quieter then LPE!
all is there now to lean it out and run more psi.
cya tuesday night
my a/r are jumping all over the place normal then real lean ect ect ect
i wouldnt think that bad wire would cause lean but it does.
i need my frickin wires
ill havem tuesday got the bosch 420 pump installed and its quieter then LPE!all is there now to lean it out and run more psi.
cya tuesday night
Melting Slicks
Joined: Mar 2003
Posts: 3,116
Likes: 10
From: Macomb MI
Any cylinder missfire is cause a lean reading. Even if running way to rich and it missfires it will show lean. 02 sensors are measuring oxygen, hence the "02". When a cylinder missfires it sends the unburned fuel and oxygen (which was not consumed by "fire" out the exhaust valve.
Phil
Phil
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Not saying it won't cause a code, but I find it interesting that my car has not thrown codes, nor did my 97 when I had a cracked plug or a fried wire. But the Tech II certainly did read it...pointed me right to the cylinders where I found the bad wires...twice now. Once when they were cracked..then after I fixed them..the one that was too close to my header (used 118* MSD boot ends)..now its back to factory wires with 90* boot ends.
Hey Nick...don't forget to put the Metal covers from your old stock wires onto the new ones...they except them perfectly.
I had my passenger side header off yesterday (inserting some helicoils) and checked all of my plug wires....all were perfect.
Hope you get the bugs worked out soon so you can get back on track. Looking forward to seeing what your car will do at the track, and how well the Bosche 420lph fuel pump works....if it works for you...it will probably be my next mod.
Hey Nick...don't forget to put the Metal covers from your old stock wires onto the new ones...they except them perfectly.
I had my passenger side header off yesterday (inserting some helicoils) and checked all of my plug wires....all were perfect.
Hope you get the bugs worked out soon so you can get back on track. Looking forward to seeing what your car will do at the track, and how well the Bosche 420lph fuel pump works....if it works for you...it will probably be my next mod.
Drifting
Joined: Nov 2002
Posts: 1,354
Likes: 4
From: Edmond OK
That's exactly what my car was doing when I was spraying. I ended up finding out that it was my #7 spark plug had melted off all the way down to the threads and then scorged my block from a chunk of the thread that had actually broken off. Good times 
I wish mine would have been just a wire! I need to get boosted soon and get rid of this N20 
I wish mine would have been just a wire! I need to get boosted soon and get rid of this N20
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
Originally Posted by Shinobi'sZ
Not saying it won't cause a code, but I find it interesting that my car has not thrown codes, nor did my 97 when I had a cracked plug or a fried wire. But the Tech II certainly did read it...pointed me right to the cylinders where I found the bad wires...twice now. Once when they were cracked..then after I fixed them..the one that was too close to my header (used 118* MSD boot ends)..now its back to factory wires with 90* boot ends.
Hey Nick...don't forget to put the Metal covers from your old stock wires onto the new ones...they except them perfectly.
I had my passenger side header off yesterday (inserting some helicoils) and checked all of my plug wires....all were perfect.
Hope you get the bugs worked out soon so you can get back on track. Looking forward to seeing what your car will do at the track, and how well the Bosche 420lph fuel pump works....if it works for you...it will probably be my next mod.
Hey Nick...don't forget to put the Metal covers from your old stock wires onto the new ones...they except them perfectly.
I had my passenger side header off yesterday (inserting some helicoils) and checked all of my plug wires....all were perfect.
Hope you get the bugs worked out soon so you can get back on track. Looking forward to seeing what your car will do at the track, and how well the Bosche 420lph fuel pump works....if it works for you...it will probably be my next mod.
i have those metal ends waiting on work bench.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
Originally Posted by RoadRebel
Any cylinder missfire is cause a lean reading. Even if running way to rich and it missfires it will show lean. 02 sensors are measuring oxygen, hence the "02". When a cylinder missfires it sends the unburned fuel and oxygen (which was not consumed by "fire" out the exhaust valve.
Phil
Phil
oh i see!
thanks phil. i love learning.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by NICK YOSKIN
kevin thats whats weird, scanner not showing missfire.
i have those metal ends waiting on work bench.
i have those metal ends waiting on work bench.
In every case that I have had a misfire, the Tech II has only been able to read it while driving...Real Time Data (RTD). If I plugged it in while idling it has not registered a misfire with burnt wires or cracked plugs (in my case on both my 97 & 01)...it had to be under a load...like high rpm shifting or lugging a high gear (4th).
There is only one time that I can remember the Tech II indicating a misfire on my car, and that was with a broken valve spring...but that effected the idle...in fact the car would barely idle.
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
The tech II and the misfire codes use the exact same data. The difference is that the codes only get set when a certain number of potential misfire events occur in a given time period (I think it is 60 seconds). Using a Tech II or a good scanner (like EFI-Live), you can see the raw potential misfire counts. HP Tuners most likely provides the same data.
Misfire detection is no easy task (especially on a manual tranny car). There are many things that can suddenly change the crank speed that are non ignition related.
The system is designed to detect misfires over time, not instantly.
Most tuners also tweak the misfire detection thresholds in their base tunes. This will totally mess with the misfire detection and it typically makes it non operative at idle.
Misfire detection is no easy task (especially on a manual tranny car). There are many things that can suddenly change the crank speed that are non ignition related.
The system is designed to detect misfires over time, not instantly.
Most tuners also tweak the misfire detection thresholds in their base tunes. This will totally mess with the misfire detection and it typically makes it non operative at idle.
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Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by QuickSilver2002
The tech II and the misfire codes use the exact same data. The difference is that the codes only get set when a certain number of potential misfire events occur in a given time period (I think it is 60 seconds). Using a Tech II or a good scanner (like EFI-Live), you can see the raw potential misfire counts. HP Tuners most likely provides the same data.
Misfire detection is no easy task (especially on a manual tranny car). There are many things that can suddenly change the crank speed that are non ignition related.
The system is designed to detect misfires over time, not instantly.
Most tuners also tweak the misfire detection thresholds in their base tunes. This will totally mess with the misfire detection and it typically makes it non operative at idle.
Misfire detection is no easy task (especially on a manual tranny car). There are many things that can suddenly change the crank speed that are non ignition related.
The system is designed to detect misfires over time, not instantly.
Most tuners also tweak the misfire detection thresholds in their base tunes. This will totally mess with the misfire detection and it typically makes it non operative at idle.
So when tuners adjust the misfire detection in LS1edit or HPtuners, etc. (I have never screwed around with LS1edit..don't have time to mess with it). Is this the same value that you change, to get rid of the SES light associated with a Cam change (sometimes)?????
Melting Slicks
Joined: Mar 2002
Posts: 2,931
Likes: 2
From: Tx
Originally Posted by Shinobi'sZ
So when tuners adjust the misfire detection in LS1edit or HPtuners, etc. (I have never screwed around with LS1edit..don't have time to mess with it). Is this the same value that you change, to get rid of the SES light associated with a Cam change (sometimes)?????
Yea!
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by QuickSilver2002
Yea!
Well thanks for shedding light and teaching me something new for the day..probably won't be the only thing..but this one I definetly care about.
No wonder the Tech II won't read misfires at idle...I have almost always had a cam in a C5..and always had that misfire code adjusted, killed, turned off, whatever. So that explains why it would never register on the TEch II at idle.
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
The metal sheilds are a must if you want any longevity to the wires. Found that out early enough thanks to EFILive's scanner. Relocating the coils similar to Dan's setup is also a nice way to keep wire's anywhere near a hot surface and keeps things nice and clean looking up top. 
Good luck on resolving the misfires.
Good luck on resolving the misfires.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
Originally Posted by QuickSilver2002
Most tuners also tweak the misfire detection thresholds in their base tunes. This will totally mess with the misfire detection and it typically makes it non operative at idle.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by NICK YOSKIN
UPS DUE JUST DROPPED WIRES OFF!!!
YEAH!
kevin BTW part # 88984269
kevin are u running heat socks too?
YEAH!
kevin BTW part # 88984269
kevin are u running heat socks too?
Yes I run double heat socks "kool socks" on each wire to cover the entire length. I also took those Turbo Blankets and stuffed them (1 per side) between the headers and the wires...this shields the wires and the coil packs as an added insurance. I think the Kool Sox covering the whole wire is probalby good enough...but I ain't chancing it.
Next time I hit the dyno...I need to be firing on all 8 cylinders when we go to tune.
Last edited by Shinobi'sZ; Oct 24, 2005 at 03:27 PM.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
kevin sweeeeeeeeeeeeeeeet!
those wires make is soooooooooo much easier!
the ends are longer and stiffer it makes much easier to install. i installed socks, metal ends and stuffed three front driver side socks.
those wires are far superior to origanal ones. car is idle nicely, wish weather was nicer
well got the 420 bosch the reg hooked up and fresh plugs and wires. sounds like its time to turn it up. i wonder how high i can go on 8.4:1 alchy and 94 gas? ill find out as soon as weather breaks.
those wires make is soooooooooo much easier!
the ends are longer and stiffer it makes much easier to install. i installed socks, metal ends and stuffed three front driver side socks.
those wires are far superior to origanal ones. car is idle nicely, wish weather was nicer
well got the 420 bosch the reg hooked up and fresh plugs and wires. sounds like its time to turn it up. i wonder how high i can go on 8.4:1 alchy and 94 gas? ill find out as soon as weather breaks.
Race Director
Joined: Nov 2003
Posts: 16,066
Likes: 4,149
From: Bergen county NJ
What makes these wires better than the usual GM wires? How long do the stock wires last with headers?
Is this a good place to order them from?
GM PART # 88984269
CATEGORY: Spark Plug Wire Set
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $89.95
OUR PRICE: $44.97
DESCRIPTION: WIRE KIT
NOTE: GMPartsDirect.com carries 380,000 GM parts.
Is this a good place to order them from?
GM PART # 88984269
CATEGORY: Spark Plug Wire Set
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $89.95
OUR PRICE: $44.97
DESCRIPTION: WIRE KIT
NOTE: GMPartsDirect.com carries 380,000 GM parts.
Le Mans Master
Joined: Sep 2000
Posts: 6,976
Likes: 527
From: Clouds Over California
Originally Posted by JerriVette
What makes these wires better than the usual GM wires? How long do the stock wires last with headers?
Is this a good place to order them from?
GM PART # 88984269
CATEGORY: Spark Plug Wire Set
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $89.95
OUR PRICE: $44.97
DESCRIPTION: WIRE KIT
NOTE: GMPartsDirect.com carries 380,000 GM parts.
Is this a good place to order them from?
GM PART # 88984269
CATEGORY: Spark Plug Wire Set
PACK QTY: 1 CORE CHARGE: $0.00
GM LIST: $89.95
OUR PRICE: $44.97
DESCRIPTION: WIRE KIT
NOTE: GMPartsDirect.com carries 380,000 GM parts.
They not better than the usual GM wires so to speak. They are merely GM wires that fit the coil pack relocation on our vehicles much better than the custom wires we were using. They were made for the GM 8 liter (big block)..so they are longer with a real solid 90* boot end that accepts the stock metal heat shields that come with the stock GM wires. They are 7mm silicone and have a lifetime warranty too against defects (not burns). Perfect length for the coil pack relocation.
Nick and I were previously using custom cut to fit wires....we both had some problems with them. So these should do the trick.
Thread Starter
Le Mans Master
Joined: Oct 2003
Posts: 8,863
Likes: 86
From: PA
St. Jude Donor '08
the car is out of control!
i am starting to think those old wires were hammered some time ago.
need to get back on the dyno as wires, plugs, big pump and referenced regulator will allow for 18 to 20 psi!
i am starting to think those old wires were hammered some time ago.
need to get back on the dyno as wires, plugs, big pump and referenced regulator will allow for 18 to 20 psi!
