I put on a "cold air" intake on my 97 grand marquis about 6 months ago. I got a check engine light and got the code read, was p0171 system too lean, so i tryed cleaning my MAF sensor with the cleaner, cleaned the throttle body. I found out that my MAF sensor had gone bad...does anyone think that was because of the intake? and also after i replace the MAF should I just get another stock one...or maybe put the stock air box back on??? someone help me out please?!

how did you find out the MAF was bad? if it is bad, get a new one and reset the computer by unhooking the battery for a few minutes and see if it gives a code.if it gives the same code put the stock air system back on and reset the computer again.a prosess of elimination.

well i found out itsdone because i disconnected it and the car didnt hesitate and all the symptoms went away Edited by: surfingpolock

that was an easy and inexpensive fix.

I had a similar issue with the cold air intake on my 92, cleaned the MAF screen and unhooked the batt. and reset the computer. no more check engine.

-cheers