g8 tach signal problem
g8 tach signal problem my friend has a 08 G8 GT, and we installed some juice on it the other day, some random parts laying around, edlebrock bottle, dynotune and NOS solenoids, dynotune nozzle and NOS jets.
we are using a micro switch on the accel pedal, and a MSD electronic window switch.
the tach signal is tapped into the purple wire in the drivers side coil pack harness, i read online going thru google searches to find that was a good source. Well it works great. accept for the simple fact that when the window switch is plugged into it, reguardless of wether or not the window switch is turned on or off, it throws the p0351 code, for missfire in cyl1
this is extremely annoying and obviously makes the cyl dead. causing pops in the exhaust while all the unburnt fuel and nitrous hits the hot as hell catalytic converters...
does anyone else use a different source for rpm? i know on LS1s i have read you can use the white wire out of the ECU, that goes to the dash for the tach signal.
at this point me and my friend think its the MSD box grounding out the coilpack or something similar. because we have run these boxes on many other cars and not had trouble.
any help would be appreciated, here are some pics of the install, well while it was being installed.
wot switch
arming switch
nozzle
fuel noid attached to the rail
msd window switch
nitrous noid
car went 12.55 @ 100mph on the brakes after the backfire at the 900ft mark lol, on a 2.0 60ft.
currently jetted at 150, we would like to step up to a 175, but not if a cyl will be dead.
thanks for any help guys!
we are using a micro switch on the accel pedal, and a MSD electronic window switch.
the tach signal is tapped into the purple wire in the drivers side coil pack harness, i read online going thru google searches to find that was a good source. Well it works great. accept for the simple fact that when the window switch is plugged into it, reguardless of wether or not the window switch is turned on or off, it throws the p0351 code, for missfire in cyl1
this is extremely annoying and obviously makes the cyl dead. causing pops in the exhaust while all the unburnt fuel and nitrous hits the hot as hell catalytic converters...
does anyone else use a different source for rpm? i know on LS1s i have read you can use the white wire out of the ECU, that goes to the dash for the tach signal.
at this point me and my friend think its the MSD box grounding out the coilpack or something similar. because we have run these boxes on many other cars and not had trouble.
any help would be appreciated, here are some pics of the install, well while it was being installed.
wot switch
arming switch
nozzle
fuel noid attached to the rail
msd window switch
nitrous noid
car went 12.55 @ 100mph on the brakes after the backfire at the 900ft mark lol, on a 2.0 60ft.
currently jetted at 150, we would like to step up to a 175, but not if a cyl will be dead.
thanks for any help guys!
You can pull it off of the coil pack itself, but you will need a window switch that can interpret the signal (IE run in single cylinder mode). What color wire do you have running to the coil pack now? What color wires are in the wire harness you're trying to tap into?
Nick
Nick
Is it the odd wire out? That means, each coil pack has four wires, each will have three of the same color, you want to attach to the "Odd Wire" color. Just something to check before moving elsewhere. But like Nick said, it's likely a MSD issue not a pick up issue. I know my past MSD controllers only worked in 4-cylinder mode on the Lsx platform. But this spot needs single mode.
Robert
Robert
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Verdad Gallardo my friend is picking up a new MSD window switch, so we will find out if the brand new one does the same thing, we will have to hunt down the PCM tach singal wire out of the ECU.
anyone have a pinout, the dudes on G8 forums are too busy thinking about 22inch wheels to buy
anyone have a pinout, the dudes on G8 forums are too busy thinking about 22inch wheels to buy
this is way old obviously but the solution to this problem is once you wire it up you must disconnect the battery for 5 minutes or so. Then the check code does not come up. I had the same issue when I was installing a RPM switch. Found this solution on g8board.
