Well, I've broken down and I'm deferring to the LS6 gurus for some help. Here's a brief synopsis of what's going on with the V, and hopefully it's enough to conjure up a few possible solutions before I'm forced to tow it to a shop somewhere...
Vehicle: 2005 CTS-V w/ 97k miles
Engine: Stock w/ K&N filter, new NGK TR5IX plugs, new Magnecor 8.5mm wires
Problem: Had what I thought was an issue with motor mounts (motor felt like it was dieseling when ignition is shut off, and online/forum searches strongly suggested motor mounts as the culprit). Then, one day on the highway, CEL comes on, and the engine runs like absolute sh!t. It felt like a horrible misfire, and the vehicle wouldn't idle long before it would stall (engine was running VERY rough and poorly, but I did not hear and noise, banging/clanking).
Opened the hood, saw that the intake tube from the air filter had come off of the motor at the intake (makes sense since I had just pulled it to clean my K&N and must not have tightened it enough when I reinstalled it). I put it back on, tried resetting the computer (pulling the fuse in the engine bay, then resorted to disconnecting the battery when that didn't work).
The engine still ran like crap, so the first code was for the MAF sensor, which I replaced, and still had the same rough idle (so I took the sensor back and reinstalled the original).
Fast forward 10 weeks later to today (was out of town for work), and I am back at it. Charged the battery, installed the plugs and plug wires mentioned at the top (LStech forums suggested misfire codes could be the result of bad plugs and wires). With a freshly charged battery and new plugs/wires, I started the engine with with fingers crossed and get the "REDUCED ENGINE POWER" mode on the Nav display.
So I'm out of ideas (I don't claim to be a mechanic, but I have always worked on my older vehicles, dirt bikes, etc), and am looking for ideas on how to fix my poor car before I break the bank for a REAL mechanic... Any help would be HUGELY appreciated!
(Oh, and Hi, my name is Alan, and I'm a long time listener, first time caller)...
Codes after new wires and plugs:
P0068 - MAF/MAP Sensor throttle position correlation
P0102 - MAF or VAF A circuit low input
P0300 - Random/Multiple cylinder misfire detected (original had just this code at one point, which is what made me change plugs/wires)
P0352 - Ignition Coil B Primary/Secondary Circuit Malfunction
P0354 - Ignition Coil D Primary/Secondary Circuit Malfunction
P0356 - Ignition Coil F Primary/Secondary Circuit Malfunction
P0358 - Ignition Coil H Primary/Secondary Circuit Malfunction
P0803 "Pending" - 1-4 Upshift Solenoid Circuit Malfunction
My guess on the 4 codes mentioning the ignition coil is that there is an entire bank of coils that are bad, or the source circuit is bad, or something, since it is every other Coil (a B c D e F g H...)
And the pending code? No clue, other then it has something to do with the fact that the previous owner disabled the shift interlock from 1-4 gear...
Vehicle: 2005 CTS-V w/ 97k miles
Engine: Stock w/ K&N filter, new NGK TR5IX plugs, new Magnecor 8.5mm wires
Problem: Had what I thought was an issue with motor mounts (motor felt like it was dieseling when ignition is shut off, and online/forum searches strongly suggested motor mounts as the culprit). Then, one day on the highway, CEL comes on, and the engine runs like absolute sh!t. It felt like a horrible misfire, and the vehicle wouldn't idle long before it would stall (engine was running VERY rough and poorly, but I did not hear and noise, banging/clanking).
Opened the hood, saw that the intake tube from the air filter had come off of the motor at the intake (makes sense since I had just pulled it to clean my K&N and must not have tightened it enough when I reinstalled it). I put it back on, tried resetting the computer (pulling the fuse in the engine bay, then resorted to disconnecting the battery when that didn't work).
The engine still ran like crap, so the first code was for the MAF sensor, which I replaced, and still had the same rough idle (so I took the sensor back and reinstalled the original).
Fast forward 10 weeks later to today (was out of town for work), and I am back at it. Charged the battery, installed the plugs and plug wires mentioned at the top (LStech forums suggested misfire codes could be the result of bad plugs and wires). With a freshly charged battery and new plugs/wires, I started the engine with with fingers crossed and get the "REDUCED ENGINE POWER" mode on the Nav display.
So I'm out of ideas (I don't claim to be a mechanic, but I have always worked on my older vehicles, dirt bikes, etc), and am looking for ideas on how to fix my poor car before I break the bank for a REAL mechanic... Any help would be HUGELY appreciated!
(Oh, and Hi, my name is Alan, and I'm a long time listener, first time caller)...
Codes after new wires and plugs:
P0068 - MAF/MAP Sensor throttle position correlation
P0102 - MAF or VAF A circuit low input
P0300 - Random/Multiple cylinder misfire detected (original had just this code at one point, which is what made me change plugs/wires)
P0352 - Ignition Coil B Primary/Secondary Circuit Malfunction
P0354 - Ignition Coil D Primary/Secondary Circuit Malfunction
P0356 - Ignition Coil F Primary/Secondary Circuit Malfunction
P0358 - Ignition Coil H Primary/Secondary Circuit Malfunction
P0803 "Pending" - 1-4 Upshift Solenoid Circuit Malfunction
My guess on the 4 codes mentioning the ignition coil is that there is an entire bank of coils that are bad, or the source circuit is bad, or something, since it is every other Coil (a B c D e F g H...)
And the pending code? No clue, other then it has something to do with the fact that the previous owner disabled the shift interlock from 1-4 gear...