2002 Chevrolet Camaro Q&A
2002 Chevrolet Camaro Question: maf lean
With a maf plugged in the car runs very lean an thus pings badly. I cleaned it with a maf cleaner and tried another maf and still pings badly. If I unplug the maf no running lean and pinging. This all leads to a bad connection with the plug. What does anybody alse think? - rich z
If you feel that it is running lean it should set a code and turn the check engine light on. What do you base your assumption on? What are the fuel trim percentages, long & short? You could have a timing problem related to a faulty knock sensor, causing the pinging. When you unplug the MAF you put fuel trim, timing and other inputs into a base mode. You have assumed to much just based on unplugging the MAF. Post the codes and I can help you better. Contact me at firstname.lastname@example.org if you want anymore help from me. - mahindra
What kind of scanner are you using? - backyard tech
My fuel trims have gone lean over time. I have cleaned the maf sensor and checked the fuel pressure and it's good.