302 question
Logistics Pro
Joined: Mar 2011
Posts: 4,197
Likes: 558
From: Central Wisconsin
Auto parts stores usually are just trying to make money by "helping" you buy parts that don't help anything. 4.11 gears will help you go up hills, and they will help you get going in town, but you're going to be revved up a little more at speed. That should actually keep your truck in the powerband too. If you put headers alone on your motor it'll make a difference in the "seat dyno".
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
You stated before the truck has straight pipes, is the O2 sensor still connected and installed in the exhaust somewhere? If not you are running around in open loop mode all the time.
Those 31" tires are not helping your cause either. Amazing how much more power it takes to turn those things.
Those 31" tires are not helping your cause either. Amazing how much more power it takes to turn those things.
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Junior User
Joined: Oct 2011
Posts: 91
Likes: 0
From: Lake Butler Fl
yea the o2 sensor is there its coneccted where the two pipes come close theres a lilttle like 5/8" OD pipe right there, where the o2 sensor is, that connects both of the pipes i dont know if its any good or not. its a true dual system on there now. and they aint acutally straight pipes there cherry bombs thats been blown out
whats open loop mode?
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
yea the o2 sensor is there its coneccted where the two pipes come close theres a lilttle like 5/8" OD pipe right there, where the o2 sensor is, that connects both of the pipes i dont know if its any good or not. its a true dual system on there now. and they aint acutally straight pipes there cherry bombs thats been blown out
whats open loop mode?
whats open loop mode?
Lead Driver
Joined: May 2009
Posts: 6,815
Likes: 707
From: Tobyhanma, PA
Pull the Codes, post up what you find out.
Fuel Injection Technical Library » How To Run a Self-Test
Fuel Injection Technical Library » How To Run a Self-Test
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Junior User
Joined: Oct 2011
Posts: 91
Likes: 0
From: Lake Butler Fl
im just ganna do heads, headers, and exhaust for now, and see where that gets me... thanks for all the help guys!!! 
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Junior User
Joined: Oct 2011
Posts: 91
Likes: 0
From: Lake Butler Fl
one more question guys does the 351w have more mid to high range torque than the 302? I know with chevorlets (yes i just said that do hate me lol) the 350 had no mid range torque where as the 305 had that.
my main concern is the umph it takes to pass someone at 45-55mph thats what i am lacking at the moment and thats what i would like
my main concern is the umph it takes to pass someone at 45-55mph thats what i am lacking at the moment and thats what i would like
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
This really has nothing to do with the engine size or brand, any vehicle can do this when setup properly even the 5.slow. Right now your motor is badly smothered and the mods suggested and in particular the cam and exhaust work will literally uncork this thing.
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