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R34 Coil Pack Problem (or Not Error Codes 26 And 43)

mxtcy

By mxtcy,
in South Australia

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mxtcy Proficient

mxtcy

Posted
Posted (edited)

I posted this in Specific Auto discussion, but i know there are some wise SA people who don't alway check in there so i thought i would try my luck here too.

So i think i have a coil pack problem, i did a quick search through the posts on here and it seems as if this is the go but i thought i would just make sure and ask others if they had the same things happen.

This has only happened to me twice, both in the last month. The first time i had just got out of the drive way and all of a sudden the TCS and SLIP dash lights came on as did the check engine light. The check engine light went off, but TCS and SLIP stayed on. The car still drove fine, so i got where i needed to go and then shut the car off. When i came back to the car i turned it on and it started no problems, but the A/T (Auto/triptronic) light started flashing, it flashed a number of times and then went off. After that i drove the car around no worries then yesterday i got in the car turned it on, reversed down the drive way and as i reached the bottom the TCS and SLIP lights came on again and stayed on, and the check engine light came on and then went off. I drove the car back up the driveway and turned it off. I then turned it straight back on and the A/T light flashed a number of times (16 i think i counted). I turned it off, then back on and it started fine, no warning lights at all.

As i said i think it is a coil pack problem from what i have read, the car is going in for a service Wednesday (in 2 days) so i want to get the problem fixed then. So i'm just making sure this is the problem and that others had the same type things happen to them. Also how did others work out which coil was bad?

*****EDIT******

I ran a Self-Diagnostic and got Error Codes

26 -----Turbo Pressure Senor Signal Circuit: Turbo pressure sensor output voltage is aprox 4.8V or greater open circuit or less than 0.06V closed circuit for a predetermined time.

43----- Throttle Position Sensor Signal Circuit: Throttle position sensor output voltage is aprox 4.7V or greater open circuit or less than 0.06 short circuit for a predetermined time while park/neutral position switch is OFF and vehicle speed is 4 km/h or higher.

So aparantly these are my problems, but i have also heard of people having coil pack problems and the 21 code not showing up and them getting other fault codes instead. Yet when the coils were changed the other issues went away. Has anyone had these fault/error codes on there 34 before?

Cheers

Sean

Edited by mxtcy
Howie Grand Master

Howie

Posted
Posted

Hi Sean,

I know at least on the CA18DE that the warning lights come on when your engine misfires from a coil. Not sure about the RB motor though - is it running really rough when the lights come on? Is it just on idle or when you apply throttle? One way to check, providing it does it on idle, is removing the ornament cover and looking for stray sparks under the coils. If it's doing it on higher rpm's, then you'll probably need a spare coil and replace them one at a time.

Best thing to do from time to time, even if you don't have any coil problems, is to remove the coilpack, clean up the tips for any carbon deposits, then silicone spray the inside of the boot and the coil body.

Hope this helps.

Cheers

Howie

Coops Contributor

Coops

Posted
Posted

I had the problem myself last week in my 32. We took the ornamental cover off, started the engine (Make sure its cold and problem is present), then one at a time unplug a coil. If the motor goes slugish, then that coil is not the problem. Do it until you unplug one that makes no difference to the idle. Turn off engine, take out the coil and more than likely you'll find it has arc'd out or the like. Had 3 go in mine, wasnt nice :)

mxtcy Proficient

mxtcy

Posted
  • Author
Posted

I ran a Self-Diagnostic and got Error Codes

26 -----Turbo Pressure Senor Signal Circuit: Turbo pressure sensor output voltage is aprox 4.8V or greater open circuit or less than 0.06V closed circuit for a predetermined time.

43----- Throttle Position Sensor Signal Circuit: Throttle position sensor output voltage is aprox 4.7V or greater open circuit or less than 0.06 short circuit for a predetermined time while park/neutral position switch is OFF and vehicle speed is 4 km/h or higher.

So aparantly these are my problems, but i have also heard of people having coil pack problems and the 21 code not showing up and them getting other fault codes instead. Yet when the coils were changed the other issues went away. Has anyone had these fault/error codes on there 34 before?

J_Red33 Experienced

J_Red33

Posted
Posted (edited)

It actually sounds to me like your throttle position sensor may be up the creek mate. The TPS is linked into the auto trans & traction control systems so there's a good chance that may be the problem.

I'd be looking at other things first besides the coils if you are not having any problems with the way the engine is running. Does it go ok on full throttle both from low revs & on max boost? If it does I'm a bit doubtfull about it being coils.

The TPS may even just need a slight adjustment.

The turbo overboost could be attributed to the exhaust & front mount if the sensors maximum isn't very high. I'd say it's likely irrelivant to your problem.

Edited by JazzaR33
J_Red33 Experienced

J_Red33

Posted
Posted

Yeah could even be just a dodgy connection if it's not faulting all the time. Or if it's the TPS & it's just slightly worn in a couple spots it may play up intermittently.

Will be interested to see what they find

mxtcy Proficient

mxtcy

Posted
  • Author
Posted
Yeah could even be just a dodgy connection if it's not faulting all the time. Or if it's the TPS & it's just slightly worn in a couple spots it may play up intermittently.

Will be interested to see what they find

Results are in....

... car is perfect!

Mechanic said its nothing to worry about as he couldn't find anything at all wrong with the car.

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