Ms4, Misfire P0300 Crank Sensor
07-23-2007, 07:30 PM
#1
Teching In
Thread Starter
Join Date: Aug 2006
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Ms4, Misfire P0300 Crank Sensor Since installing Ms4, ls6 stage one heads, Fast 90/90 ,Oil pump, ls2 chain I have been getting this code p0300. I have just purchased EFILIVE and have been able to do a crank sensor relearn. This has not cured the problem. Plugs are NGK TR55 gap .045. New MSD wires. Plugs have been changed 3 times. When logging with EFILIVE no missfires at idle or above 4000rpms, just in the mid range rpm area on all 8 cylinders. Car runs fine and I cant hear any missfires. Have a 3800 vig stall hence the crank sensor relearn. Could this be false readings? How concerned should I be. If one coil was bad would it show up as missfires on all 8 cylinders. Why does it only happen at certain rpm range. The cars tune came from Wait 4me Performance. I Cant say enough good things about Jesse Bubb and all the help he has given me. Any help would be greatly appreciated.
07-23-2007, 08:13 PM
#3
Teching In
Thread Starter
Join Date: Aug 2006
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Crank sensor I have not replaced the sensor. Were is the ground wire located on the coil packs?. I did not do the install on all the upgrades. Paid way to much in labor! Car is a 2001 WS6 with 50k on her. Hope to get to the track this Friday and see what I got for all the money I spent. Car ran a 12.4 with just headers and suspention last year. Low 11s I hope.
07-23-2007, 08:18 PM
#5
Desensitise your misfire tables in the engine diagnostics tables set them , it's most likley false misfire due to the cam and lightweight convertor . You can set them all to 32000 and it will be fine . There are 2 sets of tables for low medium and high rpms , they might have just forgot to do the medium rpm table ?
Mike
Mike
07-23-2007, 08:40 PM
#6
Teching In
Thread Starter
Join Date: Aug 2006
Posts: 12
Likes: 0
Received 0 Likes
on
0 Posts
Cylinder leak down test?, that went over my head. I will take a look at the misfire tables and make some corrections. low rpm is set at 32767 all the way across. Mid rpm is set at 32767 for only about 20% of the blocks, in red. The rest are in green ranging from 21 to 1100. Do I want to change these green areas to red at 32767. Thanks
