Rough Idle*** Please Help
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From: North of Hell
Rough Idle*** Please Help
I had this posted in the wrong thread earlier 
Ive researched all the topics in here on this to get were Im at today, but I need to know more please.
Background: 2004 FX4 6" Lift on 33's, Flowmaster, K&N, 89K miles
The Story: Normal drive home last week, came to a stop at a light and the motor just went limp... Idled like a diesel with a bad tune up, check engine light came on, I tapped the gas and it straightend out, ran fine until the next light and same crap idle. Got home and pulled the code. Said P0012. So I replaced the VCT Solenoid on the drivers side, along with cleanng the MAP sensor and a new fuel filter, and did a test drive. Runs like a champ! until it gets to normal temps and when I come to a light it goes into the rough idle mode again and I get the same engine code. So I think maybe the VCT from the drivers side was still good, so I put it in the passenger side, test drive and same story!!
So is my next step the Cam Sensors on the front of the heads?? or do I need to do the Cam Phasers?? Ive read that doing the Cam Phasers at home is a hell of a job or $1200 at a dealer... is that true? Also, could having one new VCT in with an older one cause an issue?? it was on $117 and easy to put in, should I get another?
Any help here would be GREATLY appreciated!!
Jerry
Ive researched all the topics in here on this to get were Im at today, but I need to know more please.
Background: 2004 FX4 6" Lift on 33's, Flowmaster, K&N, 89K miles
The Story: Normal drive home last week, came to a stop at a light and the motor just went limp... Idled like a diesel with a bad tune up, check engine light came on, I tapped the gas and it straightend out, ran fine until the next light and same crap idle. Got home and pulled the code. Said P0012. So I replaced the VCT Solenoid on the drivers side, along with cleanng the MAP sensor and a new fuel filter, and did a test drive. Runs like a champ! until it gets to normal temps and when I come to a light it goes into the rough idle mode again and I get the same engine code. So I think maybe the VCT from the drivers side was still good, so I put it in the passenger side, test drive and same story!!
So is my next step the Cam Sensors on the front of the heads?? or do I need to do the Cam Phasers?? Ive read that doing the Cam Phasers at home is a hell of a job or $1200 at a dealer... is that true? Also, could having one new VCT in with an older one cause an issue?? it was on $117 and easy to put in, should I get another?
Any help here would be GREATLY appreciated!!
Jerry
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Joined: Nov 2007
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From: whaleyville, MD
may i ask which motor you have? thats a code for the vct system. have you ever had any work done to the engine? what kind of oil do you use? and fiter? has it ever had a dry start issue? or a rattling from inside the timing cover? camshaft timing may be off, may have a problem with the vct solenoid.
VCT solenoid valve stuck open or continuous oil flow to piston chamber
Camshaft advance mechanism binding, or faulty VCT unit
VCT solenoid valve stuck open or continuous oil flow to piston chamber
Camshaft advance mechanism binding, or faulty VCT unit
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Junior Member
Joined: Sep 2007
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From: North of Hell
Its the 5.4 and I just had the oil changed last week to try and help this as well. I used Valvoline Syn/blend and the weight it said on the Oil Fill
The Filter is a Penzoil I believe. Never had work done on it. I've removed and replaced the VCT Solenoids on both side just a few days ago. As for a "Dry Start" issue... It sounds like a diesel for a sec at start up if thats what you mean??
The Filter is a Penzoil I believe. Never had work done on it. I've removed and replaced the VCT Solenoids on both side just a few days ago. As for a "Dry Start" issue... It sounds like a diesel for a sec at start up if thats what you mean??
may i ask which motor you have? thats a code for the vct system. have you ever had any work done to the engine? what kind of oil do you use? and fiter? has it ever had a dry start issue? or a rattling from inside the timing cover? camshaft timing may be off, may have a problem with the vct solenoid.
VCT solenoid valve stuck open or continuous oil flow to piston chamber
Camshaft advance mechanism binding, or faulty VCT unit
VCT solenoid valve stuck open or continuous oil flow to piston chamber
Camshaft advance mechanism binding, or faulty VCT unit
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From: Kristiansand, Norway
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