Fuel pressure and misfire
10-08-2019, 09:12 AM
#1
Junior Member
Thread Starter
Join Date: Oct 2019
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
Fuel pressure and misfire
So, ive had a problem with cylinder two misfiring, I have replaced and checked pretty much everything I have read about on this forum. The one thing I haven't checked is the FPDM, so I checked fuel pressure at the rail with my code reader and it was reading 260 psi, and from what I read on here its suppose to be around 35-45. So im assuming it could possibly be a bad FPDM or sensor? Thanks
10-08-2019, 09:28 AM
#2
LightningRod
You sure your code reader is reading in 'PSI' and not some other units? I question if the fuel pump would even be capable of 260 PSI.
Nevertheless, I doubt that is causing misfire on one cylinder. BTW - what code is that misfire, P0302 or P0352?
Nevertheless, I doubt that is causing misfire on one cylinder. BTW - what code is that misfire, P0302 or P0352?
10-08-2019, 11:45 AM
#4
Mark
iTrader: (1)
So... you have replaced the plug in # 2 with a SP546 motorcraft plug and new boot and spring ?
10-08-2019, 02:35 PM
#6
Junior Member
Thread Starter
Join Date: Oct 2019
Posts: 4
Likes: 0
Received 0 Likes
on
0 Posts
One thing I did forget to mention, is when I originally changed the coil and spark plug the spark plug was almost completely threaded out. A couple of months after that it started missing really bad again so I checked the spark plug and it had come loose again.
