Changing to the Right MAF ! THANX!

[porscheneer]

You were right! :clapping: The 996 606 124 00 ran like Shyte!

I persuaded.... the parts guy to take back the 996 606 124 00 & got him to give me the 986 606 125 00 like you recommended, boy what a difference she is raring to go initially the intake was popping with the suction but then it stabilized.

Thanks for all your help.

My Idle is looping!! will this settle after a while? or should I mess with my Idle seems low will raising it take care of the looping?

Special thanks to

Tool Pants

Mr mickeymouse

& Loren for putting up with my Newbie questions

:beer:

[mrmickeymouse]

I would drive it and for awhile to let it settle, if not you know what you might have to do..

[porscheneer]

What would that be, the carb spray trick or raise the Idle?

How do you raise the Idle? :lightbulb:

Edited August 19, 2004 by porscheneer

[mrmickeymouse]

Carb spray, it would help to eliminate any possible leak. Raising the idle should not be necessary, it seems it was idling before and should settle on it's own.

You don't have a low idle, you have a loping idle, you cannot adjust a loping idle, but you need to fix it.

Just wait and get a few miles on it, hopefully it will correct itself, if not go to the carb spray.

Scott

[porscheneer]

Ok I have put at least 200 miles on the new MAF but it is still looping for the majority of the time however when I cold start it it is stable. What RPM is the Idle suppost to be at?

The reason why I suggested raising the idle is because when I lightly give it gas to stabalize it at 800 rpm the looping is alot less?

any Ideas :unsure:

Edited August 23, 2004 by porscheneer

[thelion]

My dealer told me they needed to change something in the computer to let it know it's taking it's readings from a 125 sensor instead of a 124. They didn't charge me anything for this, but I buy a lot of mods from them, so yours may or may not charge you.

Tom

[porscheneer]

Thanx buddy this Guy is charging 1 hour on a PST2 ... must bite Bullit .. if only I had a PST2

[Tool Pants]

Too bad your messages are all over the place so it is hard to follow the problem.

Peter said they have had problems with the second and third version e-gas sensors due to idle problems. He likes to put in the first version and then reprogram the DME for the original version. The original 2000 e-gas bulletin has been superseded by a 2001 bulletin. I have the first bulletin but not the second, but when Peter showed it to me it did not mention the third version sensor because that one just came out.

Codes P1128 and P1130 are most likely a vacum leak. Additional places are the brake booster and some other places I forget. Peter did not think it was related to the sensor, but with out seeing the PST2 print out it is all a guess.

[porscheneer]

Thanx TL

when you say first version do you mean

986 606 125 01 (first version) ?

and this is the original version

986 606 125 00 (original version)?

The CE is not on now and the engine idle was fine before I put in the new MAF so im asuming it needs a software patch, also i sprayed carb cleaner in all areas of the engine cabin could not find any leaks.

Thanx

[mrmickeymouse]

I believe go back to what you know [what the car knows], otherwords without the patch go back to the first numbered 986 606 125 00 MAF [that is if you can find it.]

But I defer to Tool Pants, if there is another way.

Scott

[porscheneer]

THANX Scott , I will be at the dealer at lunch i will let you know

[porscheneer]

OK I just got back from the Porsche dealer.

He hooked it up to the PST2 and showed me that the DME was clear there were no faults in the memory!

And there was no software upgrade needed for the new MAF. And he also checked for vacum leaks and found none.

He said I would need to leave it for the rest of the day for him to find the problem.

He also mentioned the next steps that he would take in troubleshooting the problem

- replace the the MAF with the old one in the trunk to see if the car has a loping idle and also to do some accelerated test to bring up the original fault codes P1128 and P1130

- than put in a known good MAF ( even though mine is new ) just to rule out the MAF.

-he said he would go after the throttle body, when I asked to replace it he said "NO" and item like that could probably be cleaned.

my question is if he does his accelerated test and pops up the same codes on the PST2 is it going to to tell him any more than what we know?

and rather than pay 4-6 hours of labour till he gets to cleaning the throttle body (everything else has already been done vacume leak, MAF, checking software) why dont I clean the throttlebody myself!

I searched the DIY Forum for throttle body but could not find anything can someone help direct me on how and what to clean on a throttle body.

TIA

[Tool Pants]

I asked one of the mechanics a long time ago about what he and I call a hunting idle problem, with no air flow sensor issue. He said they clean the throttle body with spray carb cleaner in a can.

Am I correct that you did not have an idle issue until the sensor was replaced.

[porscheneer]

Yes TL, that is correct so does that sound like the problem, how is it that spontaneously the Throttle body may be the problem when the Old MAF did not render the hunting Idle.

It is odd that you should mention it because the dealer mentioned the same course of action.

There must be a reason but I'm missing it.

and also I know we have been through this before but the dealer is telling me different. He said there is no sowftware patch needed when going from

986 606 125 00 to

new part number 986 606 125 01

because in a different post recently you mentioned you need the software upgrade unless the replacement is the same part number?

Thanx for your insight

Edited August 30, 2004 by porscheneer

[Tool Pants]

The patch is needed if the car had 996 606 124 00 and you are switching to the other part numbers you listed. 996 606 124 00 was the first version e-gas sensor that was used up to January 31, 2000. Your car did not have the first version sensor. Note that the first version had a 996 part number while the other two have 986 part numbers.

[porscheneer]

I see so the patch is not needed, great at least I got that out of my system, so I guess the next plan is to go after the Throttle body

Thanx scott for emailing me the Throttle body JPEGS

TP you asked if your assumption was correct earlier

"Am I correct that you did not have an idle issue until the sensor was replaced."

was that to rule in/out the throttle body cleaning for the hunting idle?

TIA

[Tool Pants]

I guess. Your car is possessed. Wish I had a PST2 since a simple code reader can only do so much.

I wish I had the 2001 bulletin to see what was changed from the original 2000 bulletin for the air flow sensor.

[porscheneer]

Well Im not sure the PST2 would make a difference because I took it to the dealer and there was nothing wrong with the car the codes had been eraced and the screen on the PST2 was blank it was not reading anything.