Exhaust Temp Question
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Senior User
Joined: Jan 2006
Posts: 344
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From: Reno, Nevada
Exhaust Temp Question
I have a 2002 f250 PSD with a 7.3 I currently have a 4 inch cat back exhaust system it dose not have a cat on it though from factory. I also have a super chips prgrammer in at the second setting tow/performance not towing over 5000lbs. I dont have a pyrometer in it yet and I never pull anything heavy with it just my dirt bike in the bed of the truck. Im wondering what might be the normal exhuast temps that anyone else that is currently running the same set up might be. With no load just normal highway speeds 65 to 70 mph at anywhere from 1750 to 2000 rpm's. My truck has 35's on it so at 65 it only tachs at about 1800 rpm's. Im just trying to get a ball park estimate on the temps as im saving my money currently for a 3 gauge pillar set up but want to make sure that im not hurting my truck by running the chip without a guage. thanks Steven
Logistics Pro
Joined: Jun 2005
Posts: 4,243
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From: AZ
Well PoWeRsTrOkEdF250, if it was me I would not run ANY chip or performance mod without the following gauges (at a minimum) installed prior to the mod: pyrometer and transmission temp gauge. If you are getting high exhaust temperatures you will not have to save your $ for gauges, you will have to save much more $ for bigger expenditures like fixing the engine or replacing the transmission. Get the gauges installed now or take out the chip until you get the $ to get the gauges installed.
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
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From: Northern Colorado
Originally Posted by PoWeRsTrOkEdF250
...........want to make sure that im not hurting my truck by running the chip without a guage. thanks Steven
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Senior User
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From: Reno, Nevada
Thanks for your post my 02 dose have a stock tranny yemp guage and i never put anyhting heavy in it or pull any kind of trailer so I wasnt sure if I would get the EGT and boost gauge or the EGT boost and tranny temp I dont actully have a 6 setting chip its a superchips programmer. I probley will end setting it to stock again unless someone can give me some real world numbers first and Im in the safe range. I have had installed for maybe 3 months and have noticed better power and milage with it installed. No problems with starting or driveability either one thing I did notice was that I dont have to hold the pedal down as far as I used to keep the power up. So I was thinking that might be a good thing as I dont have to dump as much fuel and air into because Im not on the throttle as much. Any other info would be great Im kinda new to Diesels as this is my first one I have owned but I have a good understanding on how they work and how to maintain them
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
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From: Northern Colorado
Originally Posted by PoWeRsTrOkEdF250
Thanks for your post my 02 dose have a stock tranny yemp guage and i never put anyhting heavy in it or pull any kind of trailer ...............
When you order guages, get a tranny guage too. The one on the dash is nothing more than a 3 position idiot guage; cold - normal - too hot. When it reaches too hot, it's also usually too late..........
Cross-Country
Joined: Oct 2005
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I think a lot of folks get this totally back wards. On a diesel its not necessarily high RPM's that are going to generate EGT's, its Lugging an engine that will cause them to shoot to the moon. Lugging a diesel engine is absolutely the worst thing you can do to it! As stated above, Not a good idea to run a chip with out gauges. Lastly, theres no way anybody can guess at what EGT's your truck is running. They are all Totally different. Just because they have the same year and style truck, don't mean they are running the same PCM code as you. Too many other variables that factor in.
Posting Guru
Joined: Feb 2004
Posts: 2,248
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From: Elverson, PA
Originally Posted by PoWeRsTrOkEdF250
My truck has 35's on it so at 65 it only tachs at about 1800 rpm's. Im just trying to get a ball park estimate on the temps as im saving my money currently for a 3 gauge pillar set up but want to make sure that im not hurting my truck by running the chip without a guage. thanks Steven
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Post Fiend
Joined: Jul 2005
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From: 21791
Originally Posted by WuShock
I think a lot of folks get this totally back wards. On a diesel its not necessarily high RPM's that are going to generate EGT's, its Lugging an engine that will cause them to shoot to the moon. Lugging a diesel engine is absolutely the worst thing you can do to it!
yes, i notice that too. i can pull a hill in OD at about 1500 rpm and see EGT's up to 1000* without a trailer or load. i turned around and did it again, and when it was out of OD, i was running about 2250 rpm (i think) and EGT's were around 750*. much less load. BTW that was on the "fuelie" 140 setting.
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Senior User
Joined: Jan 2006
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From: Reno, Nevada
Thank you for all your replys I have been using the website for awhile now under another name in the 80-86 truck forum. I have been scanning this one almost everyday reading other posts so I trust all your replys on the situation Im gonna return it to stock then. I cant afford to have a major break down and I need this truck to last me Im getting my tax return money back soon and I was quote by a local place of 600 dollars to install everything that I need with guages that look like my stock 02's Is this a good price? I work as a Honda tech so I do have experience with working on cars/trucks I am thinking about putting them in myself but im not sure how hard it will be anyone ever done this?
Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
If you're good with a set of tools, the guages should be an easy install. I've done every bit of my own wrenching on my PSD, and I'm not a mechanic. I've just been working on my own stuff for 10+ years.
Post Fiend
Joined: Jul 2005
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From: 21791
Originally Posted by jtharvey
If you're good with a set of tools, the guages should be an easy install. I've done every bit of my own wrenching on my PSD, and I'm not a mechanic. I've just been working on my own stuff for 10+ years.
my gauges match the stock dash perfectly:
Senior User
Joined: Nov 2004
Posts: 282
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From: Central Wyoming
Install the guages yourself. You can buy the whole thing painted and pre-wired for just about $300-350 from some of the sponsors.
I can hit 1400* playing around in my 120 setting. I don't know where you are located but elevation seems to make a diff. as well. I am a mile high here. Open intake and 4" exhaust help lower egt's also.
Good luck.
I can hit 1400* playing around in my 120 setting. I don't know where you are located but elevation seems to make a diff. as well. I am a mile high here. Open intake and 4" exhaust help lower egt's also.
Good luck.
Laughing Gas
Joined: Aug 2002
Posts: 896
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From: Kenna,wv
I have an 03 7.3 CC 4X4 auto. The only mods are a SCMT 1705, Diablo accumulator valve, adda a leaf on the front, 350 rear block, and 305's. I ran the tuner for a year with no towing before adding gauges. When I first tried it out with gauges, I was surprised how fast EGT's rise. But, on the middle setting (perf tow), I could barely hit 1200 on a run from 0-100 mph. My temps drop some the faster it goes. I have hardly ever seen it go over 1200. Never 1250. Max boost is 24. I disconnected the WG and tried it and hit 26. I have since plugged it back in to see if there is a fuel mileage difference. I just installed the "blue" cam sensor. Seeing if that makes a difference in fuel mileage too. If towing anything remotely heavy, I would add gauges. They are not too bad to install.
Fleet Owner
Joined: Jun 2004
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From: Rio Rico, AZ.
Originally Posted by PoWeRsTrOkEdF250
Thank you for all your replys I have been using the website for awhile now under another name in the 80-86 truck forum. I have been scanning this one almost everyday reading other posts so I trust all your replys on the situation Im gonna return it to stock then. I cant afford to have a major break down and I need this truck to last me Im getting my tax return money back soon and I was quote by a local place of 600 dollars to install everything that I need with guages that look like my stock 02's Is this a good price? I work as a Honda tech so I do have experience with working on cars/trucks I am thinking about putting them in myself but im not sure how hard it will be anyone ever done this?