Hessitation/Flat spot in Acceleration
02-06-2008, 05:47 PM
#1
Junior Member
Thread Starter
Join Date: Feb 2008
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
Hessitation/Flat spot in Acceleration
Just wondering if anyone had any idea. I bought this truck a week ago and checked the air filter and it was so clogged and caked with crud. I replaced it with a cheapo for now until I can work something out with a CAI or the K&N.
Since I changed the filter, when I hit the gas, the truck falls on its face for a brief moment and than is ok. Could this be the TB? Can I just clean it like any other Ford TB? Any helps gents would be greatly appreciated.
Since I changed the filter, when I hit the gas, the truck falls on its face for a brief moment and than is ok. Could this be the TB? Can I just clean it like any other Ford TB? Any helps gents would be greatly appreciated.
02-06-2008, 06:07 PM
#2
Senior Member
If the Throttle Position Sensor (TPS) was at fault, should be getting the 'check engine' light. Didn't see what model year you had, but if you have a Mass Air Flow (MAF) sensor, it can foul but can be cleaned - be sure to use the correct cleaner - do not use carb cleaner, it will damage the sensor.
If you haven't put very many miles on since the change, wonder if perhaps the computer needs to learn its way back. With a fresh filter, a given change in throttle will yield a greater change in air flow as compared to the clogged filter.
If this computer-learning is the issue, suggest that you can hurry things along by pulling the negative cable off the battery for about 20-30 minutes. This will clear the learned adjustments and put things back to a factory-default condition.
If you haven't put very many miles on since the change, wonder if perhaps the computer needs to learn its way back. With a fresh filter, a given change in throttle will yield a greater change in air flow as compared to the clogged filter.
If this computer-learning is the issue, suggest that you can hurry things along by pulling the negative cable off the battery for about 20-30 minutes. This will clear the learned adjustments and put things back to a factory-default condition.
02-06-2008, 06:09 PM
#3
Riding In The South
Join Date: Feb 2008
Location: Myrtle Beach
Posts: 275
Likes: 0
Received 0 Likes
on
0 Posts
Just wondering if anyone had any idea. I bought this truck a week ago and checked the air filter and it was so clogged and caked with crud. I replaced it with a cheapo for now until I can work something out with a CAI or the K&N.
Since I changed the filter, when I hit the gas, the truck falls on its face for a brief moment and than is ok. Could this be the TB? Can I just clean it like any other Ford TB? Any helps gents would be greatly appreciated.
Since I changed the filter, when I hit the gas, the truck falls on its face for a brief moment and than is ok. Could this be the TB? Can I just clean it like any other Ford TB? Any helps gents would be greatly appreciated.
02-06-2008, 06:14 PM
#4
Junior Member
Thread Starter
Join Date: Feb 2008
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
If the Throttle Position Sensor (TPS) was at fault, should be getting the 'check engine' light. Didn't see what model year you had, but if you have a Mass Air Flow (MAF) sensor, it can foul but can be cleaned - be sure to use the correct cleaner - do not use carb cleaner, it will damage the sensor.
If you haven't put very many miles on since the change, wonder if perhaps the computer needs to learn its way back. With a fresh filter, a given change in throttle will yield a greater change in air flow as compared to the clogged filter.
If this computer-learning is the issue, suggest that you can hurry things along by pulling the negative cable off the battery for about 20-30 minutes. This will clear the learned adjustments and put things back to a factory-default condition.
If you haven't put very many miles on since the change, wonder if perhaps the computer needs to learn its way back. With a fresh filter, a given change in throttle will yield a greater change in air flow as compared to the clogged filter.
If this computer-learning is the issue, suggest that you can hurry things along by pulling the negative cable off the battery for about 20-30 minutes. This will clear the learned adjustments and put things back to a factory-default condition.
02-06-2008, 06:23 PM
#5
Senior Member
02-06-2008, 08:19 PM
#6
Member
Join Date: Aug 2007
Posts: 35
Likes: 0
Received 0 Likes
on
0 Posts
My 04 does that sometimes. I will step on it to jump into traffic and it just dies then takes off. The engine is stock and the air filter is clean. Could I have a problem with the fuel injection or something?
02-07-2008, 06:19 PM
#7
Junior Member
Thread Starter
Join Date: Feb 2008
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
Help with the MAF. Is it the part that slides into the airbox on top of the motor? I unplugged it and pulled it out but it doesnt look like an ordinary MAF sensor wire that can be cleaned. Any help would be greatly appreciated.
Trending Topics
02-08-2008, 10:05 AM
#8
Hey guys just so you know I think, and from what I have read else where that is just kind of a factory f150 thing cause I just bought my 08 and I have less the 500miles on it and it does the same thing. Others have said getting one of the programers takes care of it.
02-08-2008, 03:50 PM
#9
Junior Member
Join Date: Feb 2008
Posts: 15
Likes: 0
Received 0 Likes
on
0 Posts
Hey guys just so you know I think, and from what I have read else where that is just kind of a factory f150 thing cause I just bought my 08 and I have less the 500miles on it and it does the same thing. Others have said getting one of the programers takes care of it.
My 04 did that from day one. I never really noticed it until someone pointed it out to me. However, as soon as I installed the Edge Programmer, the truck no long hesitated when I mashed the gas. I keep mine set on level 2 towing for optimum gas mileage.