Today I worked on my Boxster.
Replaced the MAF. Decided to throw a new MAF at that pesky rather persistent P1128 error. Picked up the new MAF the other day and on the way in the CEL came on and I just *know* it is that P1128 error. (Actually I chickened out and checked and it is the P1128. But just my luck if I hadn't it would have been something different.)
Decided to do this at work. Gathered up my tools and the MAF in its box and went downstairs to the car.
Put the top in the service position of course. Noticed right away the aftermarket top window doesn't fold as nicely as the original top window. I was doing the "chop" a number of times as I brought the top to the full service position. Finally got the top in the service position with no big kinks in the plastic window. Still it did not fold as smoothly as the factory top plastic window.
With the engine exposed -- oh is it dusty -- had a heck of a time finding the right Torx (security) bit. While I have a set Torx tool bits my eyes have lost their calibration and all Torx screw heads look alike to me. After trying a number of likely bits several times I finally managed to find one that fit in the more exposed screw. Managed to get the screws out without dropping them.
But unable to unsnap the damn latch on the MAF. Enlisted the help of co-worker and after he struggled a bit I heard the "click" and he handed me the old MAF and I handed him the new MAF then after a bit I heard the "click" again. Co-worker even offered to put the screws in for me and I let him. What a guy! Hey I held the flashlight.
Anyhow, the new MAF is in and I have my data logging CarChip set to clear the error codes when I plug it back in the car tonight before going home.
Oh, I started the engine once with the engine exposed just to make sure the new MAF works well enough that the engine runs. Engine started right up and idled pretty darn smooth. Maybe its my imagination but smoother than it has been idling.
Put the covers back over the engine and hooked up the top cables and snapped the apron rail into its clips and restarted the engine again and closed the top. Engine still idled smooth.
Looking forward to road testing the car on the way home from work.
Having a bit of a heat wave and it is in warmer weather the P1128 appears. In fact it came on today on the way in to work. So I'll get a chance to see if it appears maybe tonight -- still a bit warm out -- or tomorrow when I drive the car in to work and then drive it to lunch and back in the heat of the day.
My fingers are crossed the new MAF is the cure. I am 1 for 2 when it comes correctly diagnosing a CEL is due to a bad MAF. I'm hoping to improve my record to 2 for 3.