Peedster

Yes i saw it reaching 1,3. One time the limiter hit and cut the boost.

Ok, yes the O2 sensor is connected. First I had forgot one of the ref/speed sensor connectors so the engine didn't start and hen I found that out I saw the connected O2.
Don't know it's function though.

Anyone know how to test the MBC? This is the universal black **** type.

Rogue_Ant

Here is a guide for checking the O2 sensor:

http://www.clarks-garage.com/shop-manual/fuel-18.htm

Not sure how to test that MBC, but I'm sure someone else will.

Peedster

Nice thanks!

I also could try Another one from the shelf to see but the symptoms look familiar...

black944 turbo

What boost controller are you running? I just installed my tial on Tuesday and tried to hook it up as rennlist said and was having problems with uncontrollable boost as my controller is not able to be used for dual port. I went back and connected to single port (side port) and all is well.

Rogue_Ant

Ahhhh, yep side-port on the wastegate is what I meant (edited my earlier post)...

Black51

+1

Why not contact the vendor when you have a product from a vendor. Non one but him(Josh) knows exactly how his product works.

Peedster

I have contact with Joshua, that was the first thing I did.

But as mentioned earlier I wasn't sure and am still not sure this is where the problem lies. There seem to obviously be more problems with the engine and I never said M-Tune was causing them.

And I appreciate all inputs from those responding with useful solutions!

So if you have a problem with your 951, you contact a Porsche dealer and don't ask things here...?

/Peter

RajDatta

Peedster, the problem lies with your original post. It makes it seem like the problem was caused by installing an M-Tune.
If you were to read this post, what would be your 1st impression?

Engine started after M-Tune install - Slow drop RPM

Hopefully, you see what people are trying to tell you.

Peedster

I understand, but these issues can come up due to many things and 30% of all listers certainly know what's involved in a MAF conversion so things around the install could have been messed with.

Therefore I contacted Joshua and all the other knowledgeable people who might had this issue after installing a MAF!

Anyway if someone is willing to help out I think I discovered the overboost issue...

I think I'm on to something here involving a stuck WG! I changed the MBC lines to the WG using Lindsey's last picture of the vacuum diagram so that the banjo to MBC line goes to the top of the WG and the outgoing line fom MBC to the side port and the overboost was still there.
Last summer when my engine was spitting water out of the exhaust the WG must have rusted in closed position.

Does this sound likely? And can I wake this thing up? It's actually brand new except 5 years and a few miles driving.

Thanks!

black944 turbo

Have you tried running it in single port mode as I and other have suggested? You should run the line from the mbc to the side port and have the top port vented. Having just had this exact problem two days ago this was my issue try this and report back.

Peedster

Ok thanks.

Will try it out as soon possible.

What will be negative doing this opposed to dual port?

Rogue_Ant

The LR diagram for how to hook up a wastegate is the reverse of how to hook up a Tial unit. This is because the valve operation is a different between the two.

Hook it up in single-port for the moment, until the overboost situation is figured out. Here is the correct diagram for the Tial:

Tom M'Guinn

The diagram you posted looks correct to me for a Tial (with the middle example being the one to follow if he wants to set up his Tial in single port mode, with the hose going to the wastegate coming directly from the banjo bolt in the intercooler pipe). Or is that what you are saying?

Peter, was the wastegate and boost controller working fine before you installed the MAF? With a manual controller and no cycling valve, it's pretty much a different system, so curious how one could affect the other unless you made other changes when you installed the MAF and/or disconnected things and reassembled them wrong. Were you careful about keeping track of which hose when where? A few detailed pictures of your engine and plumbing might help folks spot something obvious...

Rogue_Ant

Yep, I see how my post wasn't quite clear enough - so I edited it. Yes, that diagram I put up is the correct one for use with a Tial.

black944 turbo

Rogue and everyone else, correct me if I am wrong but with a regular manual boost controller you CAN NOT Run it in Dual port mode unless your controller is specifically made for Dual port. Is this not correct?


I found this out when researching my problem with my tial.