HELP, What do I do?
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Senior User
Joined: Feb 2009
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From: Washington
HELP, What do I do?
I seem to have a VERY sensitive pyro response. The pyro will jump sever hundred degrees with a small increase in fuel. I have turned up the IP about ¼ turn and have removed the bowl from the intake. Everything is stock after that.
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1993 7.3L, no turbo, 4 speed auto, 2X4 and a 3.55 rear-end with 130,000 miles
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I hooked on to our 10,000 lb trailer and noticed the pyro jumps VERY fast with very little throttle movement. If I keep the RPMs up it does not smoke and the pyro is between 900-1000 at about 50mph on flat ground. If I let the RPMs get lower (1500 or so) the pyro will just keep climbing and it smokes some (not a lot). This happens when I need to slow for a corner, the pyro goes up and I start backing off, or it just powers out.
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I’m thinking about a different exhaust system. Will this help? I’m willing to spend some money improving the truck; however I do not want to spend a bunch of money on a truck if it will not tow the trailer.
<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o></o>1993 7.3L, no turbo, 4 speed auto, 2X4 and a 3.55 rear-end with 130,000 miles
<o
></o>I hooked on to our 10,000 lb trailer and noticed the pyro jumps VERY fast with very little throttle movement. If I keep the RPMs up it does not smoke and the pyro is between 900-1000 at about 50mph on flat ground. If I let the RPMs get lower (1500 or so) the pyro will just keep climbing and it smokes some (not a lot). This happens when I need to slow for a corner, the pyro goes up and I start backing off, or it just powers out.
<o
></o>I’m thinking about a different exhaust system. Will this help? I’m willing to spend some money improving the truck; however I do not want to spend a bunch of money on a truck if it will not tow the trailer.
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I seem to have a VERY sensitive pyro response. The pyro will jump sever hundred degrees with a small increase in fuel. I have turned up the IP about ¼ turn and have removed the bowl from the intake. Everything is stock after that.
fficeffice" /><O></O>
1993 7.3L, no turbo, 4 speed auto, 2X4 and a 3.55 rear-end with 130,000 miles
<O></O>
I hooked on to our 10,000 lb trailer and noticed the pyro jumps VERY fast with very little throttle movement. If I keep the RPMs up it does not smoke and the pyro is between 900-1000 at about 50mph on flat ground. If I let the RPMs get lower (1500 or so) the pyro will just keep climbing and it smokes some (not a lot). This happens when I need to slow for a corner, the pyro goes up and I start backing off, or it just powers out.
<O></O>
I’m thinking about a different exhaust system. Will this help? I’m willing to spend some money improving the truck; however I do not want to spend a bunch of money on a truck if it will not tow the trailer.
ffice
ffice" /><O></O>1993 7.3L, no turbo, 4 speed auto, 2X4 and a 3.55 rear-end with 130,000 miles
<O
></O>I hooked on to our 10,000 lb trailer and noticed the pyro jumps VERY fast with very little throttle movement. If I keep the RPMs up it does not smoke and the pyro is between 900-1000 at about 50mph on flat ground. If I let the RPMs get lower (1500 or so) the pyro will just keep climbing and it smokes some (not a lot). This happens when I need to slow for a corner, the pyro goes up and I start backing off, or it just powers out.
<O
></O>I’m thinking about a different exhaust system. Will this help? I’m willing to spend some money improving the truck; however I do not want to spend a bunch of money on a truck if it will not tow the trailer.
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Joined: Oct 2007
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From: Faibanks Ak.
What gear are you in when you are running 50 on flat ground.
How much frontal area does your trailer have.
Are you saying that your pyro is getting hotter while you are slowing down foot backed off the throttle.
How much frontal area does your trailer have.
Are you saying that your pyro is getting hotter while you are slowing down foot backed off the throttle.
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From: Washington
I'm in 3rd gear at 50. Lower end of third (low RPMs), I hit second shortly into a hill, if I back off for a corner I'm at the bottom of second thinking about first. It acts like it needs a gear between first and second. I have a hard time keeping the RPMs up. I’m worried that if I run the truck at high RPMs (3000) it will over heat the thing. There is a large front on the trailer; I did put on a canopy with an up lift, and it made a difference.
If I back off the throttle the pyro goes down. If I let off the throttle for a corner and get the RPMs to say 1500 and start back on the throttle the pyro jumps, the smoke starts not a lot and I have to back off the throttle. These throttle movements are very small, I never have it to the floor that would only melt things I have to be very easy on the throttle or the temp Pyro and engine temp will go up.
If I’m pulling the hill at 2500-3000 RPMs is there going to be smoke? I dos not smoke at those RPMs, only at lower RPMs under load. Is this correct as far as the smoke goes?
If I back off the throttle the pyro goes down. If I let off the throttle for a corner and get the RPMs to say 1500 and start back on the throttle the pyro jumps, the smoke starts not a lot and I have to back off the throttle. These throttle movements are very small, I never have it to the floor that would only melt things I have to be very easy on the throttle or the temp Pyro and engine temp will go up.
If I’m pulling the hill at 2500-3000 RPMs is there going to be smoke? I dos not smoke at those RPMs, only at lower RPMs under load. Is this correct as far as the smoke goes?
Postmaster
Joined: Jun 2007
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From: Sweetwater Texas
Don't worry about running her at 3000 RPM, with my C6 and 4.10's my cruises at 3000 RPM, and I've run over 200 miles pulling a small 5K trailer without any problems, and I'm nice to her compared to what the rancher I bought her from has done to her.
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I'm in 3rd gear at 50. Lower end of third (low RPMs), I hit second shortly into a hill, if I back off for a corner I'm at the bottom of second thinking about first. It acts like it needs a gear between first and second. I have a hard time keeping the RPMs up. I’m worried that if I run the truck at high RPMs (3000) it will over heat the thing. There is a large front on the trailer; I did put on a canopy with an up lift, and it made a difference.
If I back off the throttle the pyro goes down. If I let off the throttle for a corner and get the RPMs to say 1500 and start back on the throttle the pyro jumps, the smoke starts not a lot and I have to back off the throttle. These throttle movements are very small, I never have it to the floor that would only melt things I have to be very easy on the throttle or the temp Pyro and engine temp will go up.
If I’m pulling the hill at 2500-3000 RPMs is there going to be smoke? I dos not smoke at those RPMs, only at lower RPMs under load. Is this correct as far as the smoke goes?
If I back off the throttle the pyro goes down. If I let off the throttle for a corner and get the RPMs to say 1500 and start back on the throttle the pyro jumps, the smoke starts not a lot and I have to back off the throttle. These throttle movements are very small, I never have it to the floor that would only melt things I have to be very easy on the throttle or the temp Pyro and engine temp will go up.
If I’m pulling the hill at 2500-3000 RPMs is there going to be smoke? I dos not smoke at those RPMs, only at lower RPMs under load. Is this correct as far as the smoke goes?
dang you cant hold a hill in third? and you have to give it second? how much weight are you pulling? and dont worry about pulling her to 3000 i pull mine like that all the time up the mountain, and when im racing someone or just haveing fun in town mine just loves to hit the rpm governer for some reason lol
Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
Always pull a hill in a gear you can accelerate in and on your tranny 3rd is the same as 4th on a t19. If you mash the pedal going up a hill and your speed does not increase you need to drop a gear. On a pull I would try to stay above 2500 rpms.
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yea you need a turbo to be able to pull faster, your gross wieght is somwere around 16,000-17,000 pounds, your engine is doing every thing it has to pull that much weight, so a turbo is more than likely what you need if you want to go any faster up a hill or mountain
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From: Washington
What do you all think about the smoke? I was told a diesel smokes under load and if it’s not smoking under load its running to lean. If I'm running lean and I turn up the IP wont that just increase the exhaust temp?
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From: Washington
I'm not worried about going faster. I'm worried about hurting the truck do to the pyro readings. I'm ok with 50 mph on the flats and what ever on the hills. I just don't want to be sitting on the side of the road over heated all the time. I'm trying to be proactive on the temp thing.
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From: Faibanks Ak.
It is smoking while it is getting more fuel than it has air to burn when it gets to where it quits smokeing then the air to fuel ratio has gotten to where it needs to be.
The smoke is unburned fuel not power.
If your trailer is a high enclosed trailer with a big wind load they pull a LOT harder than a similar load that is low on a flatbed.
The smoke is unburned fuel not power.
If your trailer is a high enclosed trailer with a big wind load they pull a LOT harder than a similar load that is low on a flatbed.
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From: florida
I'm not worried about going faster. I'm worried about hurting the truck do to the pyro readings. I'm ok with 50 mph on the flats and what ever on the hills. I just don't want to be sitting on the side of the road over heated all the time. I'm trying to be proactive on the temp thing.
my temperatures are running a bit lower with the pryo as compared to the NA setup. MY fuel was turned up almost 2 flats to help me make more boost. At 2600 rpm under full power i see about 7 lbs of boost and about 1100 degrees egt. I have not tried to run it harder than that. I try to keep the egt's 1000 degrees or less.
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I turned up the IP about 1/4 turn when I installed the pyro. Looking back I needed to wait and see the pyro reading before turning up the IP. I can turn it back down, however I can use the extra I get from it.
Before the pyro and before turning up the IP I drove the truck normal. I watched the engine temp gauge and RPMs. The truck acts like the thermostat is stuck open. I ordered one from the local Ford dealer and will be getting it this afternoon. I hope to get it installed this weekend.
I’m looking into some kind of cold air intake and new exhaust. I don’t know if this will fly with the wife. She is telling me to get a new truck and be done with it. I however no not want the payment.
Before the pyro and before turning up the IP I drove the truck normal. I watched the engine temp gauge and RPMs. The truck acts like the thermostat is stuck open. I ordered one from the local Ford dealer and will be getting it this afternoon. I hope to get it installed this weekend.
I’m looking into some kind of cold air intake and new exhaust. I don’t know if this will fly with the wife. She is telling me to get a new truck and be done with it. I however no not want the payment.