turbo4 me

Those clips look exactly like the turbo hose clips; I have blown them loose in the past. The correction was that you had to be very meticulous in lining up the hoses when you clicked them in.

To test the MAF, unhook the MAF and drive the car. If the car runs good with a disconnected MAF, you need to replace the MAF.

Disconnect the MAF and drive the car- if that fixes your problem, then you know it's the MAF.

With the different diameters, your PSM likely will be kicking in at inappropriate times (even if you don't destroy the diff).

Have you looked at Hankook Ventus V12's? I just put a set on mine at about half the price of the Michelins. Reviews on Rennlist and 6speedonline are mostly positive.

Just to close the loop on this, after replacing plugs and coilpacks, there was still no improvement; if anything it seemed to be getting worse.

I was about to surrender and take it to the shop but I found a post on another website that suggested unplugging the MAF and driving the car to verify MAF operation.

With the MAF unplugged, the car ran like a rocket. Replaced the MAF and problem solved.

So the lesson I learned is that a defective MAF may pass the Basic voltage test.

You may find that your MAF will pass this test and still be defective. If your MAF passesthe test, disconnect the MAF and drive the car. If that corrects your problem, your MAF is defective.

Thanks for the idea Sunnyside- will be back working on the car first of the week.

Hi Loren,

By the way, I intend to become a contributor by the weekend. I have to fly out at 6:00 am tommorow to go get a car in New York for my wife but I will be back online Saturday.

No other faults or CELs. I haven't purchased the Durametric software but probably need to do that shortly.

I thought about air leaks due to the randomness of the problem- bank 2 is the right side bank, correct? I assume if I had a boost leak my boost would be all over the place, and doesn't seem to be the case.

Thanks

Remembered one other symptom- this afternoon during test drive it threw a CEL and I had 4 codes: 0300, 0306, 0305, and 0304. Multiple misfires on cylinders 6,5 and 4.

Hi Guys,

New owner here; back in July I bought a completely stock 2001 TT, 21,000 miles and in great shape. The prior owner put 7000 miles on it in 7 years, so suffice to say it has been a garage queen. I don't plan to mod or race the car but I do like to run it up to 100 occaisionally just for thrill of the pull. This is my fourth 911 but first turbo.

Last week the car developed a miss; I first noticed it in second gear at about 4000 rpm. Car continued to pull but with a lot of hesitation. Third gear was even worse.

Based on posts in this forum and some others, I have checked the MAF (voltage test was good but I cleaned it anyway). That had no impact so I changed the plugs. The original plugs were in the car and they were not terrible but showed some evidence of running hot.

New Bosch plugs really made no difference. If anything it seems like the problem is more random- one time it pulled great in second, then started missing in third. The next time it missed in second.

Also should mention that the problem occurs at WOT and at part throttle; above 4000 if I nail it, it is like hitting a wall. Boost goes to 0.6 or 0.7 but it just doesn't pull.

Any suggestions about what to check next would be appreciated.

Thx