Slow throttle response!
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Senior User
Joined: Apr 2004
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Slow throttle response!
I am having slow throttle response and it has been pointed out that the problem could be my TPS. Nothing I have tried so far has helped but I have NOT tried replacing the TPS yet. Any agree on that call?
On another note, I have regeared my truck up to 4:56 gears and I was told that my gas milage might get better with the new gears but it hasn't, it's been worse. The reason for the gear change was because I lifted it and put 35" tires on it. With stock tires I was getting between 375-400 miles to a tank depending on how I drove it. With the 35" tires I lost about 75-80 miles to a tank and now with the new gears I am getting even less milage...about 275-290 a tank. One guy suggested that it might be the fuel mapping sensor. Does anyone agree?
My upgrades:
Hypertech programmer
Airaid intake
T-Phlo exhaust
Throttlebody spacer
4:56 gears
On another note, I have regeared my truck up to 4:56 gears and I was told that my gas milage might get better with the new gears but it hasn't, it's been worse. The reason for the gear change was because I lifted it and put 35" tires on it. With stock tires I was getting between 375-400 miles to a tank depending on how I drove it. With the 35" tires I lost about 75-80 miles to a tank and now with the new gears I am getting even less milage...about 275-290 a tank. One guy suggested that it might be the fuel mapping sensor. Does anyone agree?
My upgrades:
Hypertech programmer
Airaid intake
T-Phlo exhaust
Throttlebody spacer
4:56 gears
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
When you say that it has slow throttle response do you mean it feels gutless? In neutral does it rev up as fast as it should?
Is your MAF sensor clean?
Did you recalibrate the speedo for the tire size?
Is your MAF sensor clean?
Did you recalibrate the speedo for the tire size?
Thread Starter
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Joined: Apr 2004
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Originally Posted by Racerguy
When you say that it has slow throttle response do you mean it feels gutless? In neutral does it rev up as fast as it should?
Is your MAF sensor clean?
Did you recalibrate the speedo for the tire size?
Is your MAF sensor clean?
Did you recalibrate the speedo for the tire size?
Do you know anything about the fuel milage? Fuel mapping sensor?
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
Unfortunately even with the lower gears it still takes a lot to get bigger tires rolling.
The biggers tires also don't cut through the air as easy as smaller ones so that doesn't help the mileage either.
There's no such thing as a fuel mapping sensor. I wonder if he meant the MAF (Mass Air Flow) sensor? It's easy to clean and can make quite a difference. You'll find instructions for cleaning it if you do a search in the forum.
The biggers tires also don't cut through the air as easy as smaller ones so that doesn't help the mileage either.
There's no such thing as a fuel mapping sensor. I wonder if he meant the MAF (Mass Air Flow) sensor? It's easy to clean and can make quite a difference. You'll find instructions for cleaning it if you do a search in the forum.
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Originally Posted by ATC Crazy
Why did you lift it w/ 35's and put gears in it when you are so worried about gas mileage?
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Senior User
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Originally Posted by Racerguy
Unfortunately even with the lower gears it still takes a lot to get bigger tires rolling.
The biggers tires also don't cut through the air as easy as smaller ones so that doesn't help the mileage either.
There's no such thing as a fuel mapping sensor. I wonder if he meant the MAF (Mass Air Flow) sensor? It's easy to clean and can make quite a difference. You'll find instructions for cleaning it if you do a search in the forum.
The biggers tires also don't cut through the air as easy as smaller ones so that doesn't help the mileage either.
There's no such thing as a fuel mapping sensor. I wonder if he meant the MAF (Mass Air Flow) sensor? It's easy to clean and can make quite a difference. You'll find instructions for cleaning it if you do a search in the forum.
I have cleaned the MAF before and it didn't make any noticable difference. I was told there is a sensor right below or around the TPS that is supposed to help adjust fuel/air but I thought that was what the MAF was for.
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Joined: Dec 2001
Posts: 22,436
Likes: 17
From: Louisville,Ky.
There is another sensor in the air intake that measures the IAT (intake air temp). A good scanner with live data logging will show to what the sensors are doing.
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