Yea i know i couldint think of anything else to say 
Is this normal? 2nd gear acceleration.
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
Thanks for the info Dan. I'm off to look up "ignition coil". I guess I don't know as near as much as I thought I did about motors. It's not that I've never heard of an ignition coil, but I've just never had to mess with one.
My truck has over 211,000. Runs good except or the "dead spot". I'll feel better about it once I find out what is causing it.
Posting Guru
Joined: Mar 2005
Posts: 1,453
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From: Central,Texas
On my truck with 3.55's crusing around 25-35 then dump the pedal it goes back in to 2 and the truck pushes me back in the seat with acceleration.
I think its probability your 4.11's i would go smaller, However if you can live with it i would leave it alone if your not (Racing it)
I also installed a MSD Blaster coil and my acceleration has inproved a little ( I can brake loose my 275/60r17') at a dead stop.
I think its probability your 4.11's i would go smaller, However if you can live with it i would leave it alone if your not (Racing it)
I also installed a MSD Blaster coil and my acceleration has inproved a little ( I can brake loose my 275/60r17') at a dead stop.
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
On my truck with 3.55's crusing around 25-35 then dump the pedal it goes back in to 2 and the truck pushes me back in the seat with acceleration.
I think its probability your 4.11's i would go smaller, However if you can live with it i would leave it alone if your not (Racing it)
I also installed a MSD Blaster coil and my acceleration has inproved a little ( I can brake loose my 275/60r17') at a dead stop.
I think its probability your 4.11's i would go smaller, However if you can live with it i would leave it alone if your not (Racing it)
I also installed a MSD Blaster coil and my acceleration has inproved a little ( I can brake loose my 275/60r17') at a dead stop.
I can live with it as long as I know it's a normal thing. Why would the gears have this affect, though? I thought the 4.11 gear ratio would still give me good power at 1,500 /2,000 RPM. Maybe it's the combo of the low revving 300 and the 4.11.
Dude, you have a 302. Of course your rig is going to throw you back in your seat.
I work 12 hour days, so it's sun-up to sun-down at this time of year. I'm going to experiment with my truck when I can, though. If I feel what I'm experiencing is a real problem I'll start messing with it.
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Post Fiend
Joined: Jan 2007
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From: Almost Heaven
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Joined: Apr 2004
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With all due respect to those raising the gearing issue. While an arguement can be made about the best gears for this set up, gearing probably isn't the issue here.
At 30 mph, in 1:1 3rd, 4.11 axle, 31" tires, he is turning 1336 RPM.
A tap on the loud pedal producing a downshift to his 1.54:1 2nd gear will result in 2058 RPM.
Both are well within the normal operating range, far above idle and far below the HP peak of approx 3400 RPM.
I would concentrate on fuel issues including TPS as mentioned in previous posts.
At 30 mph, in 1:1 3rd, 4.11 axle, 31" tires, he is turning 1336 RPM.
A tap on the loud pedal producing a downshift to his 1.54:1 2nd gear will result in 2058 RPM.
Both are well within the normal operating range, far above idle and far below the HP peak of approx 3400 RPM.
I would concentrate on fuel issues including TPS as mentioned in previous posts.
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
With all due respect to those raising the gearing issue. While an arguement can be made about the best gears for this set up, gearing probably isn't the issue here.
At 30 mph, in 1:1 3rd, 4.11 axle, 31" tires, he is turning 1336 RPM.
A tap on the loud pedal producing a downshift to his 1.54:1 2nd gear will result in 2058 RPM.
Both are well within the normal operating range, far above idle and far below the HP peak of approx 3400 RPM.
I would concentrate on fuel issues including TPS as mentioned in previous posts.
At 30 mph, in 1:1 3rd, 4.11 axle, 31" tires, he is turning 1336 RPM.
A tap on the loud pedal producing a downshift to his 1.54:1 2nd gear will result in 2058 RPM.
Both are well within the normal operating range, far above idle and far below the HP peak of approx 3400 RPM.
I would concentrate on fuel issues including TPS as mentioned in previous posts.
Thanks for the advice. I just need some time to work on my truck. I'll start with the sensors if I think it needs fixed.
By the way, you said "A tap on the loud pedal producing a downshift to his 1.54:1 2nd gear will result in 2058 RPM.". That's just the problem, the motor isn't turning over the RPM to accelerate. When I hit the skinny pedal my tranny downshifts, my RPM drops, and I snail my way along.
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Senior User
Joined: Aug 2004
Posts: 432
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From: Central VA
Is what I am experiencing called a "dead spot"? Is this how I am supposed to describe what's going on?
Thanks for the info Dan. I'm off to look up "ignition coil". I guess I don't know as near as much as I thought I did about motors. It's not that I've never heard of an ignition coil, but I've just never had to mess with one.
My truck has over 211,000. Runs good except or the "dead spot". I'll feel better about it once I find out what is causing it.
Thanks for the info Dan. I'm off to look up "ignition coil". I guess I don't know as near as much as I thought I did about motors. It's not that I've never heard of an ignition coil, but I've just never had to mess with one.
My truck has over 211,000. Runs good except or the "dead spot". I'll feel better about it once I find out what is causing it.
The coil should be about $50 and was very easy to replace on my 5.0. Right on top of the engine, just a couple bolts and a wire or two plugged in.
New User
Joined: Sep 2003
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just had the same problem changed every thing ( plugs, wires rotor, tps coil ect)turns out it was the cat converter (actually two of them) from runing rich and slow they were clogged.
Ran along fine bet 1700-2500 rpm after that felt like a cow. sent all kinds of codes. Changed cats and cant belive its the same truck.
Quick test thermo lazer front of cat shpould be at least 100 degrees cooler than rear
> mine was 600 in front 400 in the back.
Ran along fine bet 1700-2500 rpm after that felt like a cow. sent all kinds of codes. Changed cats and cant belive its the same truck.
Quick test thermo lazer front of cat shpould be at least 100 degrees cooler than rear
> mine was 600 in front 400 in the back.
Post Fiend
Joined: Nov 2005
Posts: 7,437
Likes: 4
From: Charles Town, W bygod Va
Sounds like not enough fuel or clogged cat to me. I'd replace the fuel filter. Listen to the tailpipe while someone revs the engine. You sometimes hear a whistling noise from a clogged cat
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
My point before was the the big I6 doesn't like to rev high and if you down shift into a lower gear it revs up and then quickly leaves is power band so its reving and not making near as much power. Then it shifts and the rpms come back down.
Does it feel like its bogging is just reving? Also, does it seem like the transmission might be slipping?
Does it feel like its bogging is just reving? Also, does it seem like the transmission might be slipping?
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
I don't know of "dead spot" is the correct term. But I remember mine acted like you describe, it would sort of bog down when I floored it instead of, well, accelerating.
The coil should be about $50 and was very easy to replace on my 5.0. Right on top of the engine, just a couple bolts and a wire or two plugged in.
The coil should be about $50 and was very easy to replace on my 5.0. Right on top of the engine, just a couple bolts and a wire or two plugged in.
I hope it's not a fuel pump.
I did run my truck a little today. I ran her hard, both in OD and without OD. I couldn't get my truck to fall flat like she has been doing, but get this; my motor will rev higher on my rear fuel tank than my front. At least that's what it seems. On my rear tank my motor jumped clear past 4K when I stomped it at 15 mph! My motor has NEVER revved that high before.
I couldn't get my motor to repeat this on my first tank.
(Not that a 300 needs to rev to 4,000 EVER, unless to shake mud off the tires.)
just had the same problem changed every thing ( plugs, wires rotor, tps coil ect)turns out it was the cat converter (actually two of them) from runing rich and slow they were clogged.
Ran along fine bet 1700-2500 rpm after that felt like a cow. sent all kinds of codes. Changed cats and cant belive its the same truck.
Quick test thermo lazer front of cat shpould be at least 100 degrees cooler than rear
> mine was 600 in front 400 in the back.
Ran along fine bet 1700-2500 rpm after that felt like a cow. sent all kinds of codes. Changed cats and cant belive its the same truck.
Quick test thermo lazer front of cat shpould be at least 100 degrees cooler than rear
> mine was 600 in front 400 in the back.
Will an exhaust shop put pipe in place of a cat, if the cat is gutted and therefore usless?
Thread Starter
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
My point before was the the big I6 doesn't like to rev high and if you down shift into a lower gear it revs up and then quickly leaves is power band so its reving and not making near as much power. Then it shifts and the rpms come back down.
Does it feel like its bogging is just reving? Also, does it seem like the transmission might be slipping?
Does it feel like its bogging is just reving? Also, does it seem like the transmission might be slipping?
The tranny feels good, thank God. It's not in the best health but it's not slipping yet.
I apologize, can you please rephrase this? "Does it feel like its bogging is just reving? " I'm really tired and don't understand the question.
