986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - 1999 2.5 986 misfiring while accelerating

awilson986 · 09-05-2014, 08:41 AM

Hi, thought I would see if anyone has had this issue. Car was misfiring, and wouldn't idle. Had fault codes 301,302,303 (misfire). I change the spark plugs and coil packs , codes away but not cured. Changed the Maf sensor which has helped as does idle from cold start now. Cold or at temp when trying to accelerate , it pops and holds back . Running lean ? Was going to look at lambda sensor next ? Not wanting to just change for the sake as no codes now, any ideas?

09-05-2014, 08:41 AM	#1
awilson986 Registered User Join Date: Sep 2014 Posts: 1	1999 2.5 986 misfiring while accelerating Hi, thought I would see if anyone has had this issue. Car was misfiring, and wouldn't idle. Had fault codes 301,302,303 (misfire). I change the spark plugs and coil packs , codes away but not cured. Changed the Maf sensor which has helped as does idle from cold start now. Cold or at temp when trying to accelerate , it pops and holds back . Running lean ? Was going to look at lambda sensor next ? Not wanting to just change for the sake as no codes now, any ideas?