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Member
- Joined
- Feb 27, 2008
- Messages
- 31
- Reaction score
- 5
- Points
- 8
- Location
- So. Calif
- Vehicle Year
- 2002
- Make / Model
- Ford
- Transmission
- Automatic
I have a miss and cannot figure it out.
Currently I have a miss at idle, but cleans up once I apply some rpm, and seems to have good power, I get the P304 on my code reader.
Engine is the 3.0 with the plastic intake manifold (no egr valve)
2002 Ranger XLT 196,000 miles
It started with a P104 (?) lean condition cyl 4, I did a smoke test and found smoke leaking in the crankcase, so I replaced the intake gaskets, and fixed that problem.
This then was followed by the P304, I thought it was possibly the fuel injectors, so I tested (ohm) and cleaned all of the injectors, I have replaced the coil,plugs and wires, idle air control valve and still have a miss at idle. I got a compression tester from Autozone and cannot get it to read (on any cylinder) I have an old compression tester and cannot get it to read either (I don't know why) the plugs look good the porcelain is white, no fuel build up and no chalky white either.
I did a live scan with my code reader and the long fuel trim bank 2 goes from 10% at Idle to 2/3% off idle (1500 rpm and up)
Mechanically I do not hear any excessive valve tapping/noises.
I have put 'sea foam' directly into the intake ports, also fed it through the intake before the throttle body, hoping to clean off the valves.
I am concerned about the PCV valve in the crankcase as there seems to be oil in the intake, I noticed it around the rubber gasket from the upper to lower intake manifold when I cleaned the injectors the other day, I did just replace the PCV valve and hose elbow about 8 months ago.
Am I missing anything? any tips would help.
Thanks.
Curt
Currently I have a miss at idle, but cleans up once I apply some rpm, and seems to have good power, I get the P304 on my code reader.
Engine is the 3.0 with the plastic intake manifold (no egr valve)
2002 Ranger XLT 196,000 miles
It started with a P104 (?) lean condition cyl 4, I did a smoke test and found smoke leaking in the crankcase, so I replaced the intake gaskets, and fixed that problem.
This then was followed by the P304, I thought it was possibly the fuel injectors, so I tested (ohm) and cleaned all of the injectors, I have replaced the coil,plugs and wires, idle air control valve and still have a miss at idle. I got a compression tester from Autozone and cannot get it to read (on any cylinder) I have an old compression tester and cannot get it to read either (I don't know why) the plugs look good the porcelain is white, no fuel build up and no chalky white either.
I did a live scan with my code reader and the long fuel trim bank 2 goes from 10% at Idle to 2/3% off idle (1500 rpm and up)
Mechanically I do not hear any excessive valve tapping/noises.
I have put 'sea foam' directly into the intake ports, also fed it through the intake before the throttle body, hoping to clean off the valves.
I am concerned about the PCV valve in the crankcase as there seems to be oil in the intake, I noticed it around the rubber gasket from the upper to lower intake manifold when I cleaned the injectors the other day, I did just replace the PCV valve and hose elbow about 8 months ago.
Am I missing anything? any tips would help.
Thanks.
Curt
