Missing. Worse when cold
11-20-2007, 10:21 PM
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Missing. Worse when cold
**Update** Sea Foam is the miracle cure all.
I have a 99 F150 4.6 150k miles. It picked up a pretty serious miss a while back and I wasn't sure what the problem was so I did the following
Replaced spark plugs - No help
Replaced one coil - better but still miss
Replaced second coil - better but still miss
By better I mean it doesn't miss at idle if it is warm outside.
Cleaned MAF - No help - Is it possible the MAF is bad? If so is there a test?
When the temperature outside is cold it seems to have a dead miss in the motor. If it is 70 degrees outside it runs fine unless I step on it. Under hard acceleration it cuts out badly and the check engine light flashes.
I was going to have the codes pulled but the check engine light does not stay on. I am assuming nothing will show up if the light is off?
The ABS light comes on. Not sure if that means anything.
If I can't get help here my next steps are clean the injectors and replace the catalytic converter. I am reaching here.
Thanks ahead of time for your attention.
James
I have a 99 F150 4.6 150k miles. It picked up a pretty serious miss a while back and I wasn't sure what the problem was so I did the following
Replaced spark plugs - No help
Replaced one coil - better but still miss
Replaced second coil - better but still miss
By better I mean it doesn't miss at idle if it is warm outside.
Cleaned MAF - No help - Is it possible the MAF is bad? If so is there a test?
When the temperature outside is cold it seems to have a dead miss in the motor. If it is 70 degrees outside it runs fine unless I step on it. Under hard acceleration it cuts out badly and the check engine light flashes.
I was going to have the codes pulled but the check engine light does not stay on. I am assuming nothing will show up if the light is off?
The ABS light comes on. Not sure if that means anything.
If I can't get help here my next steps are clean the injectors and replace the catalytic converter. I am reaching here.
Thanks ahead of time for your attention.
James
Last edited by JamesD; 11-22-2007 at 09:36 PM.
11-20-2007, 10:54 PM
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After reading previous posts I am going to clean the EGR tomorrow. I guess I should have searched a little more before posting. I will post the results.
Removed the EGR. It was working fine. Cleaned it and re-installed. No help.
Removed the EGR. It was working fine. Cleaned it and re-installed. No help.
Last edited by JamesD; 11-21-2007 at 08:10 AM.