will2769

My CEL will come on intermittley, usually once or twice a day and also I have intermittent hesitation in low RPM's. Could this just be plugs? I have 52,000 miles and havent changed the plugs yet. I did just clean the the MAF.

C4CRNA

Get someone to read a code with an OBDII code reader.Autozone will apparently do this for free at their stores.

will2769

Thanks for the info. I will go to Auto Zone now.

washington dc porsche

Sounds like a MAF issue but yes go to Autozone as stated earlier.. Someone here can tell you what the codes mean but often times the codes will read to be everything else but the MAF.

C4CRNA

What did you clean the MAF with??

nycebo

QRC Electronic Cleaner

will2769

Maurice, I used carb cleaner and was very carefull with the MAF. I am thinking its plugs. Because now for two days I have no CEL light.

washington dc porsche

Spark plugs causing a CEL, that's a first? Is this normal for Porsche? What happened at Autozone?

will2769

I didnt think the CEL light was caused by plugs, thats why I think it may be plugs, no CEL light for 2 days. Didnt go to Autozone, because no light anymore.

C4CRNA

I think you can still get a code read out and it will point you in the right direction.Is it still rough idle or hesitating?

1999Porsche911

Bad plugs can cause a CEL because it causes that side of the engine to run rich. The O2 sensor tries to lean out the mixture and reaches its limit. Result is a CEL.

will2769

Thanks for the info. I havent had a CEL,hesitation or rough idle for two days now...wierd. It's like it fixed itself...Porsche enginering.