2003 F150 4.6L #1 & 2 cyl misfire
Thread Starter
|
New User
Joined: Dec 2009
Posts: 10
Likes: 0
2003 F150 4.6L #1 & 2 cyl misfire
We have a 2003 F150 4.6L that has codes for cyl 1 & 2 misfire. We have changed the plugs, and one of the coils. All of the plugs in bank 1 looked VERY rich, and the plugs in bank 2 looked ok (except that half of the plugs were the wrong ones). We smoked the intake and found some leakage through the EGR, and replaced it. We have checked the injectors with a bench flow tester, they had a good flow/spray pattern. The bank 1 ST fuel trip is -30%, and the O2 sensors are reading -30.0v. The truck is dumping fuel, as evidenced by the burning of our eyes. Anybody come across this kind of problem? Any idea's where to look next?
Thread Starter
|
New User
Joined: Dec 2009
Posts: 10
Likes: 0
K, so here's what we found:
Left bank cats were done, front one completely gone and rear one completely plugged.
Turns out that the o2 sensor readings where false readings. I've noticed that the NGS sometimes gives you too many PIDS, and that's what the -30v reading was.
We changed the right bank cats, and the truck runs mint.
Hope that saves someone else some time too.
Left bank cats were done, front one completely gone and rear one completely plugged.
Turns out that the o2 sensor readings where false readings. I've noticed that the NGS sometimes gives you too many PIDS, and that's what the -30v reading was.
We changed the right bank cats, and the truck runs mint.
Hope that saves someone else some time too.
Thread
Thread Starter
Forum
Replies
Last Post
Kid Clean
1997 - 2006 Expedition & Navigator
18
Mar 3, 2015 09:23 AM
joe32hog
1997 - 2003 F150
6
Jan 28, 2002 08:58 PM
