2001 Ranger miss

DWHEATH

MEMBER
2001 FORD RANGER
6 CYL
2WD
AUTOMATIC
140,000 MILES

'01 ranger started missing and gave P0302 code (misfire cylinder 2). Changed plugs and wires. Still getting code. Started getting p0306. Read that cylinder 2 and 6 are paired and fire at the same time so I figured the coil pack was going and replaced. Now getting p0301 (cylinder 1). Engine misses at all speeds and loads, but SEEMS to get worse the longer I drive. When the truck runs right, it runs good so I don't think it's a compression problem or it would be constant, but I could be wrong. I want to look at the cam position sensor, injectors and maybe the ECU, but would like a professional opinion.

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Compression is good and plug was changed on cyl.6-check the injector for no.6

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

1.Defective spark plugs
2.Inadequate spark/coil,defective spark plug wire.
3.Lack of compression
4.False air leakage.
5.Faulty fuel injectors.
6.Insufficient fuel pressure.
7.Contaminated fuel.
8.EGR valve that is leaking.
9.Oxygen sensors.
10.Throttle position sensor.
11.Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

Note: If it doesn't apply disregard it-