Problems with P0021 and P011
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Problems with P0021 and P011
So, its a long story. I have a 2004 F-150 with the 5.4, it has had a P0606 code. But was running. i did a tune up. I replaced the coils, plugs, and did an oil change. After about 100 miles it went into limp mode. Once i got it home scanned it. I had a short on the coil circuit. Evidently the wrong coils were sold to me and they shorted out. I replaced those, the engine was still missing really bad. I had a ford tech scan the truck, looked like i needed to replace the pcm. I got a reman from O'reilly. It was bad out of the box. The next two were bad out of the box. So now on my fourth one, i have a pcm that will run my truck but not see the four wheel drive. I got a lean code, i replaced the mas airflow sensor. Lean code went away, then had O2 sensor codes. Replaced the upstream ones. Those codes went away. Now, i have a P0021 ignition signal, and a P0011 over advanced code. I replaced the vvt solenoids. Oil pressure is at 22 psi hot idle in gear. The code stayed. The truck runs ok at low speeds, but when i get up to about 40 it misses really bad. Any help at all would be greatly appreciated.
2004 F150, 5.4
1FTPX145X4NA20920
2004 F150, 5.4
1FTPX145X4NA20920
Fleet Mechanic
Joined: Apr 2016
Posts: 1,653
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You don't say how many miles on truck . I would make sure I have real good clean grds on truck . Engine and body check the ones in left and right kick panel too . Maybe you are from rust country ,big corrosion areas . Check pcm grds too . braided one in engine compartment . Next check your main battery leads for corrosion inside insulation . You can do a volts drop test using load like headlights . I don't like the sound of your many replacements of pcm .
Your problem with running poorly above 40 always sound like misfires . Torque pro 5$ /android phone /cheap bluetooth reader from amazon under test results will give you misfire raw computer counts towards setting a code on each cylinder . You need sp546 mc plugs and a hosp clean plug job , clean cop contacts ,new boots and springs , just a little dielectric grease on each end of boots . all connectors should lock on cops and injectors . Use contact cleaner on all connectors , clean high volt tabs on cops . use mc cops . you can spray pcm connectors too .
There is more to check but nothing is going to work well if you have a corrosion problem .
Your problem with running poorly above 40 always sound like misfires . Torque pro 5$ /android phone /cheap bluetooth reader from amazon under test results will give you misfire raw computer counts towards setting a code on each cylinder . You need sp546 mc plugs and a hosp clean plug job , clean cop contacts ,new boots and springs , just a little dielectric grease on each end of boots . all connectors should lock on cops and injectors . Use contact cleaner on all connectors , clean high volt tabs on cops . use mc cops . you can spray pcm connectors too .
There is more to check but nothing is going to work well if you have a corrosion problem .
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Sorry i should have mentioned miles, 190k
I do live in rust country, Ohio, the grounds did look good. The plugs and coils are new, used new boots as well.
PCM replacement was weird. The first pcm would only fire 6 cylinders, 1-5 and 8. The next one would fire cylinders 1,3,7,and 2 for about 30 seconds then flip to 6,5,4, and 8 for 30 seconds. It would just keep rotating every 30 seconds. Left a Ford certified mechanic of 25 years just saying it cant do that. The third one ran the truck, but would not see the four wheel drive. This one does what it should, but now i have these two codes. Also as a side note, if i listen with a stethoscope i do not hear any cam phaser noise. Nor do i hear the chain slapping the cover.
I do live in rust country, Ohio, the grounds did look good. The plugs and coils are new, used new boots as well.
PCM replacement was weird. The first pcm would only fire 6 cylinders, 1-5 and 8. The next one would fire cylinders 1,3,7,and 2 for about 30 seconds then flip to 6,5,4, and 8 for 30 seconds. It would just keep rotating every 30 seconds. Left a Ford certified mechanic of 25 years just saying it cant do that. The third one ran the truck, but would not see the four wheel drive. This one does what it should, but now i have these two codes. Also as a side note, if i listen with a stethoscope i do not hear any cam phaser noise. Nor do i hear the chain slapping the cover.
Fleet Mechanic
Joined: Apr 2016
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Okay I hear you . I think you are getting past a lot of failures . Unfortunately pressure at oil sensor does not mean for sure you have it at vcts . Leaking seals on tensioners are common as well as clogs in oil gallery's and vct bodies .
So basically the cam sensors are saying your phasers are not where they are supposed to be . The vcts are releasing dirty oil to phasors but in the end they are not getting on position . I do an engine flush every other oil change and i use 5w30 full syn . I take it that the phasors are original . If you go in consider old style ratcheting tensioners with no gasket to fail and don't have to wait for oil pressure to build .
You could drop oil pan and see if guide pieces are in there ,if so you know you have to go inside timing cover . Just some common ideas here. If you pull valve covers you can see phasers and see if at rest the middle finger of the three lines up with the L if not its shot .
So basically the cam sensors are saying your phasers are not where they are supposed to be . The vcts are releasing dirty oil to phasors but in the end they are not getting on position . I do an engine flush every other oil change and i use 5w30 full syn . I take it that the phasors are original . If you go in consider old style ratcheting tensioners with no gasket to fail and don't have to wait for oil pressure to build .
You could drop oil pan and see if guide pieces are in there ,if so you know you have to go inside timing cover . Just some common ideas here. If you pull valve covers you can see phasers and see if at rest the middle finger of the three lines up with the L if not its shot .
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fteduran
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Jun 24, 2011 07:48 AM
