Engine stutttering problem but no CEL - 986 Forum - The Community for Porsche Boxster & Cayman Owners

RobZ · 09-04-2008, 11:54 AM

Over the past couple of weeks I've noticed that during the climb from around 2200RMP to 2800RPM (always exact same RPM) in second gear the engine has a slight lag or stutter. However, no CEL has come on. So far it is very subtle but noticeable to me. I'm guessing that it is the MAF and/or O2 sensors. I took apart the MAF when I purchased it and gave it a little clean with some of the CRC cleaner (maybe I am the cause?). Should I just reclean or replace the MAF and O2 sensors or should I have it diagnosed, if even possible

RobZ · 09-05-2008, 10:15 AM

Not a common problem?

Sputter · 09-05-2008, 01:31 PM

I guess you could check the coil packs but i would have expected to see a cel light to atleast flash.

FrayAdjacent · 09-05-2008, 01:59 PM

I'd suggest checking and cleaning the MAF again. This time, with something specifically made for it. Check your filter, too. A clogged filter might hinder responsiveness.

RobZ · 09-05-2008, 02:08 PM

Quote:

Originally Posted by FrayAdjacent

I'd suggest checking and cleaning the MAF again. This time, with something specifically made for it. Check your filter, too. A clogged filter might hinder responsiveness.

All filters are new OEM recently replaced. I'll try to clean the MAF sensor with MAF Sensor cleaner. Is there a general rule for how much to spray onto the sensor? Should I soak it enough to actually drip? I'd assume it should not be wiped, etc. only sprayed.

blinkwatt · 09-05-2008, 02:08 PM

I wouldn't doubt you MAF is bad. There goes $250 and 10 minutes worth of work. My 99' did the same thing when the MAF was bad.

You want the one with the e-accelerator.

http://www.************************************************************/search/product.aspx?sid=v4ezkr555sbjik3t2tum5d3a&makeid=800019@Porsche&modelid=1388358@BOXSTER%20S&year=2001&cid=22@Fuel%20%26%20Air%20System&gid=5068@Air%20Mass%20Sensor

Don't try cleaning it,I swear it only makes it worse. Why did you clean it in the first place?

RobZ · 09-05-2008, 05:12 PM

Quote:

Originally Posted by blinkwatt

Why did you clean it in the first place?

I thought I was having a MAF related problem that turned out to be something else. I was having second thoughts prior to cleaning it but I didn't realize I'd F it up (which I probably did). There goes my beer money for the weekend.

here's to drinkin water.

bencomer · 10-01-2008, 04:45 PM

How do I know if my car is "with M620 E-Acceleraor" or "without M620 E-Acceleraor?" I am not sure with one I need for my base '98 Boxster 2.5. Also, is there a special tool needed to pull the MAF? I have star wrenches, but it appears to need some sort of hollow star wrench to pull it. Any ideas about where I can find the wrench?

Ben