How to diagnose and resolve engine issues using Durametric.

[wawa]

Hi

I dont have my 986 anymore, sold it for a brand new 981. But related to the egaz, my mechanic had change the tb to check for faulty egaz, but no change. But your problem really look like mine. You have done about everything
Il had try. I really hope you'll find out whats wrong.

Later

Wawa

[jb92563]

I did take apart the Throttle plate actuator and spray electronic contact cleaner on the wipers and there was no change.

I think I'll take the car for a spin tonight and go get some fresh fuel.

I can start driving it to work and see if the situation improves with the new battery and the computer relearning after resetting everything.

As I mentioned I was idling in the driveway looking at the Durametric data on the laptop when suddenly it started running consistent again. Perhaps the DME made a correction?

If it was the egas I would think that the problem would be consistent and not wandering idle and then suddently steady again.

However, problems do love to hide right under your nose in the most unexpected places and often the last thing you think it could be is precisely what it is.

[jb92563]

Update -

So since the last time the car shut down it was running perfectly.

I startup and everything runs perfect still, so I go to the gas station and fill the tank.

Upon restarting, it quickly stalls and then I try again and it starts but now its running horrible again with the wandering idle and hessitation when accelerating and just coasting along. No check engine lights and probably the same codes as before but I will check tonight.

I get a block from home at a light and it stalls.

My first attempt to restart and I get nothing when I turn the key, no clicks or starter turning...nothing.
Then I take a breath, wait a couple seconds and try again and it starts and runs perfectly again all the way home.

WTF is going on I'm in the pulling hair out realm now....damm F$%#@!*&^%$#%)%##

Any suggestions, I'm running out of ideas, or do I just give up and take it to an Indie at this point and hope they can figure it out?
Anyone know of an excellent shop that does Boxster work in my area?

Is my computer going bad? Is there a way to test it?

[NewArt]

Yes!
Betcha it feels good to finally see positive results!

[jb92563]

Thanks for the support guys.

Its a great relief to have cleared that major hurdle without spending much $$$.

Now I'm reading about the Door lock issue and have found several tricks and background info on what that could be.

Apparently the Key FOB can loose its programming/sync at several levels and there are several ways to restore it.

Since I kept my original Key, but replaced the donor RFID pill and transmitter part I did not think there should be any issue like this.

It is possible that the button on the FOB may be faulty by one description that I read, and the donor car did crash so...

I'll document what I find here and especially if one of the DIY methods work.

Just an FYI, the Mileage on the car remained the same when I replaced the computer ECU. That info must be stored in the instrument clusters memory.

However all the other info like revs in various ranges, total hours, the VIN paint codes, options and other stuff are from the ECU.

I suppose I could get all that changed at the dealer but since Im not thinking of selling its of no consequence at this point. I'll add all that info to my documentation file though just in case its ever needed.

[jb92563]

Update: I have been having codes come up again P1133, P1126, P0507, P0420, P0102.

And its been running rough with hunting idle again. Other times it seems to run perfect and the codes go away.

So I suspected the MAF again although its only 6 months old and a couple hundred miles.

I opened the filter and looked inside and found bits dark schredded of paper/foil near the drain hole in the airbox on the clean side of the filter. I have no idea how that got in there but it may have fouled the MAF.

I sprayed the MAF with MAF Cleaner and also the plug contacts on the MAF and the Harness side.

I cleared the codes and now it runs perfect again with no codes. Hurray!
I hate that stupid MAF, its so temperamental.

Perhaps I need to buy one from a dealer next time as there are suggestions out there that the dealers get the better quality MAF's.
Seems implausible that the same SKU product comes in different grades. I'd be interested in the QC test parameters so we can measure for ourselves
to verify the unit is up to Porsche specs, what ever that may be.

[Steve Tinker]

Well done......
A lot of us would have given up long ago and taken it to the OPC for evaluation and fix.
You now deserve a cold beer (or two)!!

[Gilles]

Originally Posted by Steve Tinker

Well done......
A lot of us would have given up long ago and taken it to the OPC for evaluation and fix.
You now deserve a cold beer (or two)!!

Congratulations..! Like the saying goes;

Persistence drops panties.. :-)

.

[jb92563]

On to the Test drive.

It now runs better than ever, with all the new plugs, O2 sensors etc.

Test Drive was flawless.

I cleared the airbag error codes with the Durametric.
It had a voltage to unit error and a seat belt system error.
I'm assuming those were stored from the Donor Boxsters crash.
Looks like it hit a pole head on from the pictures.
No more Airbag light once those codes were cleared.

The only remaining issue is not being able to lock the doors.

I'll do some google searching and see what turns up on that issue.

May have to visit the dealer or indy with a piwis system to reset or enable something in the security system.

Every thing else works normal.

The one thing that bothers me is WHY my computer died?

Just a coincidence or did something short out in the process of replacing my AOS which was the beginning of all my trouble.

[guesswecan777]

Ooooh great post!