[don's 97]

Hello Everyone
I have some fault codes that was pulledoff of my truck and i was wondering if someone with knowledge could pleae help me out with.
PO 478 Ex Press. control valve high
PO 236 Turbo Boost Sensor A
PO 470 Ex Press Sensor Cir Fault
These codes were pulled off by someone else and I don't know what they mean.
I would like to know about a larger transmission cooler, what kind and size.
This information would be greatly appreciated as a new truck is not in my budget.
Thanks Much
Don's 97

 

[caryt]

You have a chip?

Everything you need:

http://pages.prodigy.net/stevebaz/_import/pages.prodigy.net/stevebaz/index3.html

 

[Nit]

Teh exhaust back pressure is no big deal, jsut about everybodys has that, no harm .
The boost sensor is either readign over its parameters, ie chip? a Cary says or its faulty, but you should have some running issues if thats the case.

 

[GA Farmer]

I bought the biggest Hayden Tranny cooler they make. It was in stock at my local auto parts store. For something like motor homes with a 26,000 GVWR.
I live in GA and tow a pretty big boat in the hot summer...I have never seen my tranny temps go above 185. It is installed with the factory cooler still in place. I also put in an auxillary filter in line too. Can't help with the other maybe Mark K. will chime in.

 

[don's 97]

To caryt, Nit & GA Farmer on fault & tranny cooler

Thanks guys for responding to my questions on my fault codes.
I have had problems getting connected so I wasn't able to thank everyone sooner.
PO 478 ex press. control valve high (I guess I won't worry about)
PO 236 turbo boost sensor A (I do have a BDX-Power Chip set on the lowest flashing it had to preserve my engine. Truck runs very good so I guess it is OK I won't worry on this one either)
PO 470 ex press. sensor cir fault (not sure on this one)

I will look for a price on a Hayden Tranny Cooler, I pull a 35.5 ft. fifth wheel with a utility trailer behind it with some toys on it, I am a little over 65 ft. and pull fron Ohio to Arizona and back every year 2,200 miles one way. I need to keep my truck in good shape. I am retired on social security and always low on cash.

I will look at pricing a set of pillar gages to monitor my engine. I have 213 k on it now with an E40D transmission. I will look into Isspro. Kits to install myself.

Thanks again
don's 97

 

[Nit]

teh ex is not a worry , the boost pressure sensor has been tripped for a reason before, if you clear them out , just see if it comes back.
Transmission care is an often overlooked item, you must change teh fluid every year, it does wear out regardless of color, teh stock convertor is CRAP, period. Teh cheapest way to save a stock truck is to change teh convertor out with a 2003 Ford model, add a Transgo tugger kit, with the pump mods done, and add a big Tru-cool 4590 cooler. When adding a chip make sure you can get TQ lockup in third gear as this will be your tow gear.

Lastly, when towing , run the rpm up, tow at 2600-3000 at 1/2 to 3/4 throttle, this gets your boost up adn will cool the motor, also the higher rpm gets the engine fan running faster.

 

[don's 97]

Nit
The person that works on my tranny told me the faults keep coming back when he tried to clear them out. I have the tranny fluid changed every 5-10 k miles. I will have it changed yearly now. I tow in OD at 2200-2300 rpm's unless I pull a grade and I will turn OD off I am going around 64 MPH. I have a 410 rear end. Do you think I should tow without OD? I haven't noticed the engine getting hot when towing in OD. I will look into a bigger cooler Thanks

 

[Nit]

if you can tow in OD thats fine, 2200 is lugging it a bit with a decent load anyways, you can always run it up to 3000 if the going gets harder. The secret is to not baby it, don't back off when the EGT gets up there, drop a gear adn hit the throttle, get the boost up higher adn it cools off, plus spins the fan at higher rpm = more airflow.

If you get a 1728 TC slip code then do the tranny work, teh ex stuff is teh back pressure valve tube being plugged , but eh boost sensor should clear off, if not find somebody that knows what it means, or start a new thread to get help to figuire it out.

 

[don's 97]

Nit

Thanks for the information. I will push a little harder when I start to bog down next time. Do you know what the exhust temoerature should be?

 

[Nit]

pre turbo keep it less than 1200, you can run up 1300 for short periods, I did see 1650 one time drag racing a newer 6.0l, but don't do that.
post turbo, not more than 1000-1100.

pre and post turbo is just where you put the probe, either in teh exhaust manifold or in the downpipe, you are lookign at a 100-300* drop.

 

[don's 97]

Nit

Thanks again Nit, I don't want to be a real bother but I do need to know if pre turbo and post turbo is where the sending unit is mounted and could you let me knowwhere the best place is.
Thanks
don's 97