F150 02 4.6l shaking in need of help
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F150 02 4.6l shaking in need of help
Hello forum i am need of desperate help my f150 had that dam rain/humid problem were the plugs start to miss fire ect... well 1 year now and always and i mean always i have that cel light go no and off for cylinder 1, but this week it started to shake and today it was doing it shaking so bad i couldnt even stand being in there. so thats my problem it never went away since i did a new timing chain replacement also i started losing coolant i have no leak i checked everywhere for them. i am starded to think its either a busted headgasket or.....a bent valve
. also if it matters it does the whine sound when i turn it off after a run i changed the egr valve and the sensor/solenoid whatever it is thats also connected to it.
btw; plugs, cops, are all new motocraft and even used that electrode waterproof something on the plugs to seal them.
thanks,
. also if it matters it does the whine sound when i turn it off after a run i changed the egr valve and the sensor/solenoid whatever it is thats also connected to it.btw; plugs, cops, are all new motocraft and even used that electrode waterproof something on the plugs to seal them.
thanks,
Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
Time to take a compression check on cylinder 1, check for bubbles in the coolant with the engine running or do an exhaust gas test of the coolant.
Check oil for signs of coolant, check the plug for signs of coolant on the tip.
If your losing coolant it's going somewhere.
Lots of way to look out for this.
Good luck.
Check oil for signs of coolant, check the plug for signs of coolant on the tip.
If your losing coolant it's going somewhere.
Lots of way to look out for this.
Good luck.
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Joined: Jul 2000
Posts: 337
Likes: 1
From: Colorful Colorado
I ran a tank of E85 (dumb move I know) and had the same symptoms you describe - CEL misfire, unbearable shake at idle.
In the last 40k with regular gas, I have a miss at idle but no CEL. Seems like I have extra air in the coolant as there is always a gurgling sound when I shut off the truck. Changed plugs and coils but no improvement. I'm at my wits end - no idea what to test or change. Looking forward to any solutions the community has to offer.
In the last 40k with regular gas, I have a miss at idle but no CEL. Seems like I have extra air in the coolant as there is always a gurgling sound when I shut off the truck. Changed plugs and coils but no improvement. I'm at my wits end - no idea what to test or change. Looking forward to any solutions the community has to offer.
Last edited by Howies_effie; Jun 15, 2012 at 12:57 AM.
Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
You have nothing to go on for a solution.
A missfire will set a code so you don't really have a missfire.
A missfire is detected by the crank sensor measuring rotation time for each cylinder everytime the plug fires.
Likely an air/fuel ratio issue causing rough idle.
Until some investigation is done with a scanner to look at live data, there is nothing to go on.
Good luck.
A missfire will set a code so you don't really have a missfire.
A missfire is detected by the crank sensor measuring rotation time for each cylinder everytime the plug fires.
Likely an air/fuel ratio issue causing rough idle.
Until some investigation is done with a scanner to look at live data, there is nothing to go on.
Good luck.
Thread Starter
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Joined: Apr 2012
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You have nothing to go on for a solution.
A missfire will set a code so you don't really have a missfire.
A missfire is detected by the crank sensor measuring rotation time for each cylinder everytime the plug fires.
Likely an air/fuel ratio issue causing rough idle.
Until some investigation is done with a scanner to look at live data, there is nothing to go on.
Good luck.
A missfire will set a code so you don't really have a missfire.
A missfire is detected by the crank sensor measuring rotation time for each cylinder everytime the plug fires.
Likely an air/fuel ratio issue causing rough idle.
Until some investigation is done with a scanner to look at live data, there is nothing to go on.
Good luck.
miss fire on cyl 3
i know it might not be good, but its not cyl 1
maybe when it was raining hard here in texas 4-5 days ago water got stuck there wich cause the next.2.running to lean and..
3. rough idle something 1000 rpm
sorry i dont have the exact quotes or description i forgot to leave the scanner in diagnostic section when i got out the truck. now im going to go check cyl 3 more likely the spark plug whent out because the cops still dont even have 800 miles on them
and im really hoping its not that.Thanks bluegrass im going to go do a little researching and try to jump in the truck this afternoon to see what happen to the cyl 3.
Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
Begin again, gather all you can about the faults, then procede to work on the missfires per the fault codes.
Do no guessing or work on past history.
Work on the present issues and you will get things straightened out.
List all the codes so we can see what you have and to provide direction.
Reason is to many mis-interpet the codes and what they mean.
Example: 171/174 codes say lean. People jump on the word 'lean' but don't know it means the fuel tables have been shifted lean, not the motor running lean.
Good luck.
Do no guessing or work on past history.
Work on the present issues and you will get things straightened out.
List all the codes so we can see what you have and to provide direction.
Reason is to many mis-interpet the codes and what they mean.
Example: 171/174 codes say lean. People jump on the word 'lean' but don't know it means the fuel tables have been shifted lean, not the motor running lean.
Good luck.
Thread Starter
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Member
Joined: Apr 2012
Posts: 11
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Begin again, gather all you can about the faults, then procede to work on the missfires per the fault codes.
Do no guessing or work on past history.
Work on the present issues and you will get things straightened out.
List all the codes so we can see what you have and to provide direction.
Reason is to many mis-interpet the codes and what they mean.
Example: 171/174 codes say lean. People jump on the word 'lean' but don't know it means the fuel tables have been shifted lean, not the motor running lean.
Good luck.
Do no guessing or work on past history.
Work on the present issues and you will get things straightened out.
List all the codes so we can see what you have and to provide direction.
Reason is to many mis-interpet the codes and what they mean.
Example: 171/174 codes say lean. People jump on the word 'lean' but don't know it means the fuel tables have been shifted lean, not the motor running lean.
Good luck.
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Senior Member
Joined: Jul 2004
Posts: 6,200
Likes: 39
From: Easton, Pa.
The 316 code is just a response that has detected the cylinder 3 as a missifie right from the cranking stage.
It will clear with the cylinder 3 repair.
The 171 code is likely an air leak from bad rubber fittings or some cause letting unaccounted for air into the intake at some point that has driven the fuel table to it's out of limit setting causing the code..
Clear the cylinder missfire issue, then the 171 issue.
Do not run the truck with a cylinder out. This puts the cats in danger of overheating on that bank and a huge expense and hassle of changing them.
After the repairs you can clear the codes to see what comes back if any but the system will do a complete new diagnostics of everything over several drive cycles.
Good luck.
It will clear with the cylinder 3 repair.
The 171 code is likely an air leak from bad rubber fittings or some cause letting unaccounted for air into the intake at some point that has driven the fuel table to it's out of limit setting causing the code..
Clear the cylinder missfire issue, then the 171 issue.
Do not run the truck with a cylinder out. This puts the cats in danger of overheating on that bank and a huge expense and hassle of changing them.
After the repairs you can clear the codes to see what comes back if any but the system will do a complete new diagnostics of everything over several drive cycles.
Good luck.
Thread Starter
|
Member
Joined: Apr 2012
Posts: 11
Likes: 0
The 316 code is just a response that has detected the cylinder 3 as a missifie right from the cranking stage.
It will clear with the cylinder 3 repair.
The 171 code is likely an air leak from bad rubber fittings or some cause letting unaccounted for air into the intake at some point that has driven the fuel table to it's out of limit setting causing the code..
Clear the cylinder missfire issue, then the 171 issue.
Do not run the truck with a cylinder out. This puts the cats in danger of overheating on that bank and a huge expense and hassle of changing them.
After the repairs you can clear the codes to see what comes back if any but the system will do a complete new diagnostics of everything over several drive cycles.
Good luck.
It will clear with the cylinder 3 repair.
The 171 code is likely an air leak from bad rubber fittings or some cause letting unaccounted for air into the intake at some point that has driven the fuel table to it's out of limit setting causing the code..
Clear the cylinder missfire issue, then the 171 issue.
Do not run the truck with a cylinder out. This puts the cats in danger of overheating on that bank and a huge expense and hassle of changing them.
After the repairs you can clear the codes to see what comes back if any but the system will do a complete new diagnostics of everything over several drive cycles.
Good luck.