Coded On Gopher

[Spy007]

First a big thanks again to The Big Z.

2 weeks ago we did codes on the gopher due to the rough Idle, we cleared and arranged to meet again so that we can c if the code comes up again.

We did this to try and isolate what is causing the code.

Tonight we did and got the following.
It also seems that there is a air vacuum leak in/near the manifold? The MAF is 100% but seems after the throttle body it is sucking air.

So here are the questions?

1. DME 2D29 Plausibility diff. pressure sensor
Any more explenation on this code????

2. If we suspect a leak and we find it, how easy is the fix, as it seems to be in the back. I will pist picture asap?


Any advice would be greatly appreciated.


Again THANKS Z, Wimpy is on me again.

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Possible fixes?????

Of E46 Forum

I replaced the throttle body gasket and this seems to have fixed the problem.

Thanks to the responses and this forum is really great which is more than I can say for my local main dealer (Syntner Chigwell - Essex) who wanted to replace the valvetronic servo motor & intake pressure sensor.

The maf seemed ok and I couldnt find a vacuum leak but I looked very closely at the throttle body which didn't look like it fitted flush to the manifold. The bolts were tight but it obviously wasn't right. I took the throttle off and had a look at the gasket which looks like a bright orange rubber band. It had become very slightly squashed over the five years I've had the car.
It looks like the manifold has a manufacturing fault and I'm guessing that the small amount the gasket had become squashed was just enough to let air in.

 

[Hellas]

wow, R50 wimpy or R250 dealer... mmm, looks like you are in for a clogged artery soon LZ

 

[zaleonardz]

Hehe,

Tis a pleasure Spy, I learn alot as well, so its all good.

2D29 = Intake manifold pressure, Implausable value. This combined with an audible sucking sound def means a vacuum leak somewhere, and throttle body gasket or intake gasket, or even PCV valve could be the cause here... so bit of R&D for your there spy.

Also, very interesting though, the MAF did give an implausible signal both time we did diagnostics, called it the "Hot air film sensor" which I suspect is the MAF, but we reset it and spy went for a quick drive, and it only threw the intake pressure error.

 

[clutchplate]

you'll get an implausable value from the MAF if you've unplugged it while the engine is running or if you have a wirint problem also.
implausable value means that the voltage its giving the DME is out of range, like say the MAF has a voltage range of 0.5v to 1.0V .. if the voltage is 0V or 4V or something it will say implausible value...

well, that counts for anything connected to the DME, not just the MAF. but you get the idea..

just something I noticed in the 7 days I was playing with my DME to get the dumb thing to work.

 

[Spy007]

Z what was the kit you were talking about I can buy?? Gasket???

 

[zaleonardz]

First see if you cant find the leak, as it could be in a few places.

But theoritaclly you are looking for an intake manifold gasket set, a thottle body gasket set, and perhaps a PCV plate replacement.