01 supercrew 5.4 hesitation
10-06-2015, 08:35 PM
#1
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01 supercrew 5.4 hesitation
What would cause my truck to be sluggish/hesitate/miss fire around 1500 to 2500 rpms while accelerating. Its not throwing any codes. Changed the fuel filter about 6 months ago. Thanks for any help
10-06-2015, 09:00 PM
#2
What causes a misfire? Really?
Let's start with spark plugs and coils.
Let's start with spark plugs and coils.
10-06-2015, 10:31 PM
#4
Not sure how many miles you have on your truck. Could be a vacuum line that is loose, or, you need to clean you MAS that is located on your intake. I had the same thing, I used a K&N air filter and the oil from the filter gets onto the MAS and makes it read wrong and it confuses the Computer.
Good luck wit that.
Thanks,
A56nomad
Good luck wit that.
Thanks,
A56nomad
10-06-2015, 10:34 PM
#5
Originally Posted by a56nomad
Not sure how many miles you have on your truck. Could be a vacuum line that is loose, or, you need to clean you MAS that is located on your intake. I had the same thing, I used a K&N air filter and the oil from the filter gets onto the MAS and makes it read wrong and it confuses the Computer.
Good luck wit that.
Thanks,
A56nomad
Good luck wit that.
Thanks,
A56nomad
10-06-2015, 10:43 PM
#6
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Sorry it's got 167000. And I did have a k&n filter on it but went back to a stock filter and cleaned the maf sensor 3 or 4 times. I replaced one vaccum line that I thought was bad but didn't help anything. The vaccum elbow on the drivers side valve cover is a little wore out but not bad. Gonna replace it this weekend.