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Go tow again but this time, when needing power, keep ur at 2500rpm +..
Also, post up pic of engine bay. Do you have gauges? If the plan is to tow, id invest in egt gauges and a, feul pressure gayge. Every other sensor can be monitored thru the obd via elm327 dongle and old/new phone-tablet
Look into guzzle 7.3 website for maint/mods, especially the hutch/harpoon
What do you mean by "tows way better"? Gassers and diesels are two different animals.
The 7.3L is no hot rod but it will flat out haul the load. In stock form you won't be keeping up on the freeway if there's any headwind or incline but you will get there every time.
IMO rather than comparing it to other vehicles, make sure the truck is at 100% then see how it does. I would recommend an EGT gage and maybe fuel pressure since the truck does not have a sensor to monitor either one of those. For relatively cheap you can get a bluetooth OBDII adapter and monitor just about everything the truck sees too. These will give you access to a ton of truck data and a lot of what people here will ask for to help you narrow down any issues.
It doesn't take too much to give the truck some oomph (intake and tuner since you have an exhaust) to liven up a truck that's pushing 20 years old. But they are old. These trucks were the top of the heap back in their day but are the back of the pack now as far as performance.
Not knowing how the SCT is set up would concern me. Have you tried removing it completely and see how the truck runs? Have you re-installed it and have the same symptoms? Something to consider is that there a number of custom tuners out there that do a better job of coaxing better performance out of our trucks than the bigger name brands.
Just my .02
Thank you for the good info!
Im absolutely not saying an Escalade tows better than my 99 F350 lol I’m just trying to explain how it HAS to be lacking power. Let’s put it this way coming up roughly a 25-30 degree incline hill hauling a Pontiac G6 I was struggling to break 40-45mph holding out between 2200-2400 rpms. I know there should be no comparison in towing and durability between an Escalade and an F350. I used to drive trucks hauling cars for a living.
Ive never dealt with a chip/tuner, I’ll have to see about reinstalling it. I just did the preset tune and nothing really changed so I reverted back to stock.
i plan on adding a gauge pod cluster to my order list, I hate not knowing what’s going on.
Another question. The fuel bowl heater has been unplugged since I bought the truck. Without heated fuel, would that decrease power in 20 degree weather?
Go tow again but this time, when needing power, keep ur at 2500rpm +..
Also, post up pic of engine bay. Do you have gauges? If the plan is to tow, id invest in egt gauges and a, feul pressure gayge. Every other sensor can be monitored thru the obd via elm327 dongle and old/new phone-tablet
Look into guzzle 7.3 website for maint/mods, especially the hutch/harpoon
So 2500 is normal when towing? Maybe that’s my issue. I’m trying to take care of this truck and didn’t want to hold rpms out too high. I’m used to bigger diesels where I could cruise at 70mph holding out 1700-1800 rpms up some hills even then I see this thing not too far off the red line and I figured it was lacking power some way. I definitely need the gauges.
* trying to upload pictures but I’m not on WiFi so it’s having some issues.
Unplugged fuel bowl heater shouldn't be a problem but it indicates that the PO had an issue with the element being shorted out so they unplugged the heater, it's fairly normal for that to happen. Yes, IMO anything under 2000 RPM's for these is lugging them and they don't perform well down there. How are you measuring your fuel pressure?
Unplugged fuel bowl heater shouldn't be a problem but it indicates that the PO had an issue with the element being shorted out so they unplugged the heater, it's fairly normal for that to happen. Yes, IMO anything under 2000 RPM's for these is lugging them and they don't perform well down there. How are you measuring your fuel pressure?
Ok that’s good to know. Maybe I am wanting too much out of this truck. I’m trying to be easy with it and not run the heck out of it but if it’s normal to shoot 2500+ rpms then that’s what I’ll start doing!
For fuel pressure I tapped into the fuel bowl pre filter and ran it down the road gauge sitting on windshield. I just rented a fuel gauge from autozone.
You can be at 3k 24/7 and the engine will be fine.
Good to know! I guess there is no real issue then. I just warmed it up and took it for a spin, at 3k this 8/9k lb beast flies down the road. I just had no idea i had to run the rpms so high.
I still dont don’t like the blue smoke at start up and the bad smell from the exhaust so I’ll be running some tests but I’m not as worried about power now.
Good to know! I guess there is no real issue then. I just warmed it up and took it for a spin, at 3k this 8/9k lb beast flies down the road. I just had no idea i had to run the rpms so high.
I still dont don’t like the blue smoke at start up and the bad smell from the exhaust so I’ll be running some tests but I’m not as worried about power now.
Originally Posted by MD_7.three
I'm not so sure there's anything abnormal about that smell...these are not your newer clean idle certified diesels...
Yep! The time to worry is when there's no smell coming out the exhaust. And if you see yourself getting stuck behind one of these on the road switch your HVAC to 'recirculate' as fast as you can.
Yeah... and modified injectors only make it worse. Be grateful the sulfur is gone from the fuel.
You have a late '99... I see the Air Intake Heater, which we usually remove. Another thing, I'd take that red tube (next to the green one in front of the turbo), follow it to the wastegate actuator, remove it there, and plug it up by attaching it to a clamp bolt. That will lower your EGTs when pulling hard. You can search "red line mod".
So I was checking out the boots for the intercooler to make sure I don’t have a leak and I found a loose clamp on the drivers side orange boot. When I tried to tighten it up, the boot is too oily and it rides right up the boot. I degreased it, tried again and it still rides up it.
my question is, by looking at the picture, is the clamp actually around the pipe or did it ride up too high to where it’s not clamping the boot to the pipe. I don’t know how for the pipe rides up inside the boot.
12-19-2018, 08:40 AM
