Heres one for all you TD guys. I have 94 6.5 TD with approximately 10,000 miles on new engie. My problem is power when pulling my travel trailer approximately 8000 LBS. I can cruise at 60 -65 MPH on highway but as soon as I have to climb a hill I am at 30-35 MPH. Turbo seems to be kicking in but I am not sure as I can not hear it that well. Will have turbo checked next week but wanted to see if any ideas before it goes to shop.

:help:

GAUGES so you know whats going on. Open up the exhaust is a cheap and easy way to help. Also update your signature so we know what you drive. There is a FAQ thread that is stuck to the top of the page that has lots of good info in there to.:exactly:


OH BTW WELCOME ):h

35 mph?? That could also be a fuel supply restriction, Have you checked lift pump/OPS for operation by opening the airbleed on the filter or the water drain T while the engine idles.

I was thinking that QM or wastegate problems, bit he didn't mention any smoke so I thought gauges to monitor the engine would be helpful

I agree. The vac controlled wg function will seem like it's working sometimes and never make more than 5 psi WOT. Without a boost gauge it's not possible to see it.

Can you please give me more info on the air bleed valve? Can you please tell me where it is located?

On top of the fuel filter. The fuel filter is under the turbo power cover. How old is the filter?

The water drain is on the coolant crossover. you can open either with it running to check for OPS/LP operation, or jump the LP relay to power the LP with the engine off.

After you change your fuel filter you should purge the bowl by opening the water drain and powering the LP. Then open the airbleed and let the air out.
Changing your filter correctly requires the opening of both valves BEFORE the engine is started or you will send solid contaminants into the IP from the bottom trap and possibly air, which will pass but can also stall the motor after 10 seconds of running and not want to start for a bit 'till you crank all that air out.

I had the same trouble a few years ago. My temps were getting too high causing the waste gate to shut down. Open the exhaust and get guages. I also quit towing in overdrive to keep temps down.

Just contacted shop today & he asked if the transmission seemed to be shifting down. Would that cause the problem? I would think I would hear the transmission whine. Any thoughts?

Fuel delivery is everything to a normally functioning engine with good filters, compression ect.
you would feel it if the tranny was the problem.

Did you drain the T and bleed the air? Was there crap/air?

I turned valve, nothing but fuel. No air.

How old is the filter?
You could change it to see if it makes an improvement or just open the bleed and then rotate the black plastic ring CCW till it unscrews and pull the filter up for a looksee. It should be a lighter shade than dark brown or black. New they are bright white.

Sort of new to this stuff can you please tell me what the ccw is?

Sure thing, Counter Clockwise

Sort of new to this stuff can you please tell me what the ccw is?

Thanx for being patient.

I was having poer problems and downshifting in the transmision and thanks to this site I found that my air intake sensor was bad. I was causing some real concern as I thiought it was the tranny. I'm no mechanic but it is cheap to test.

Heres one for all you TD guys. I have 94 6.5 TD with approximately 10,000 miles on new engie. My problem is power when pulling my travel trailer approximately 8000 LBS. I can cruise at 60 -65 MPH on highway but as soon as I have to climb a hill I am at 30-35 MPH. Turbo seems to be kicking in but I am not sure as I can not hear it that well. Will have turbo checked next week but wanted to see if any ideas before it goes to shop.

:help:More info please, this towing or running empty, what rpms on engine at 35 mph hill climb speed, when was last fuel filter change, I suspect a partially blocked one, try a new filt 1st, also when opening drain valve and you got out fuel was engine running. How much smoke on the hill climbs, Visit FAQs locked at top of 6.5 threads this problem is in there I'm sure, also update your sig line per welcome notes as well. Pretty common question yours, lot of checks to make before thinking the worst. It is a good bet if you follow FAQs you won't need a shop visit.

The trailer was about 8000 pounds. It was going up hill. THe RPM gauge is inop so I can not tell RPMs also we were on dirt road so not sure if any smoke. My wife was commenting about surging in truck. I did not notice. I know now I need gauges and other things. FIlters are about 12 months old. Are there just 1 filter or more on 6.5 TD 94 model? The engine was running when I opened T valve. Any suggestions?

Change filter 1st before doing anything else, does it only fall off when towing or without towing as well? If truck does not stumble/shutdown with drain tee open at idle then lift pump is working. A partially blocked filter can cause exactly what you are experiencing, happend to me and many others, only 1 filter on the system unless somebody added one, generally on the frame rail, in FAQs I have a pic of my filter install, many similar installations. You need to get the tach up and running it's a critical piece of data when troubleshooting, hauling 8K trailers is a pretty healthy load for a unmodded 6.5, you need to get gauges, and open exhaust/down pipe ASAP at a minimum if you plan to tow that much weight often.

12 months on the filter! Wow, I'm lucky if I see 10,000 miles or 6 months use before it's shot.

When you change the filter, be sure to purge the bowl through the drain T to remove the contaminents that came off the old filter before starting it.

Just seems to fall off on hills. When you say urge by drain T I assume you mean the t that is on the front of engine? I believe that is one we talked about. Will change filter ASAP. Will try for muffler/gauges ASAP. Thanx!

12 months on the filter! Wow, I'm lucky if I see 10,000 miles or 6 months use before it's shot.

When you change the filter, be sure to purge the bowl through the drain T to remove the contaminents that came off the old filter before starting it.
Yes QM but not everyone adds lard ;) to their fuel either, okay yellow grease, in addition to fuel filter drain T center front of the engine as QM recommends, mop out the bottom of the filter bowl to get all sediment out , when you rmove the filter see if the plastic final screen is in the filter bowl, it slides over the stem in the center, sometimes it sticks inside the filter being removed, make sure if it's in there you reinstall it before tossing out the removed filter.

You will have to purge the air from the filter before attempting to start.

Naw, that's pump diesel. With grease hitting my stock filter only it lasts ~ 2500 miles.

Where you buying your Diesel, you need a frame prefilter really helps keep out the big chunks, look in FAQs filter thread of a on engine one I cut apart at about 20K looks nearly new other than discoloration.

When purging system I would leave T valve open until all fuel is out of bowl? Novice at this. Thanks for all the info?