loss of power up the mt

[ken wilkinson]

hello folks..hope u r well..wife and I went to asheville this weekend..first time In 2011 tiffan breeze diesel..hit bottom of mt at 70 mph coach bogged down quickly to 40 mph, we made 8t other but allison trans did not diwnshift..any thots where to begin

 

[Neal]

35-40'ish is normal going up the mountains, I don't think you're seeing anything wrong.

 

[turbopilot]

Just completed a trip moving North to South through high country in Colorado. Pulled 3 passes: Rabbit Ears (9,426' & 6.8% grade), Tennessee (10,424' & 6% grade), and Wolf Creek (10,857 & 6.8% grade). Newmar New Aire was moving a combined weight (with TOAD) of 42,000 lbs. Lowest forward speed I saw was 31 mph on Wolf Creek Pass near the summit. Climbing the passes was not much of an event but managing energy without overheating the brakes going down the passes was more interesting. This was done during one of the heat waves with very high temperatures for Colorado. I was amazed how cool the engine ran climbing these passes. Most of them required full power (pedal to the metal) for 20 to 30 minutes going up the pass. But engine temps stayed nice and cool.

 

[ken wilkinson]

35-40'ish is normal going up the mountains, I don't think you're seeing anything wrong.

thank u..I am use to gas motorhome..

 

["EZ"]

I'd look at your air filter to make sure your engine is getting plenty of air. This will cause a reduction of power. Also make sure your fuel filters are not clogging up. Lack of fuel flow will also cause reduction of power. Other than that it might just be that the hill was real steep and your load was heavy for the amount of HP/TQ that your engine produces. You can down shift the Allison manually next time to see if that helps. Keep those RPM's around 1500 or so. This should be close to the sweet spot for the engine TQ.

 

[ken wilkinson]

I'd look at your air filter to make sure your engine is getting plenty of air. This will cause a reduction of power. Also make sure your fuel filters are not clogging up. Lack of fuel flow will also cause reduction of power. Other than that it might just be that the hill was real steep and your load was heavy for the amount of HP/TQ that your engine produces. You can down shift the Allison manually next time to see if that helps. Keep those RPM's around 1500 or so. This should be close to the sweet spot for the engine TQ.

will do ..dealership was suppose to service, but I know how that goes sometimes..just
located fuel and oil filter under bed...what a strange place but least its air conditioned!...thank you HUGE!!!

 

["EZ"]

will do ..dealership was suppose to service, but I know how that goes sometimes..just
located fuel and oil filter under bed...what a strange place but least its air conditioned!...thank you HUGE!!!

Your air filter on a diesel engine usually has a "filter minder" on the outside of the filter housing that will show the air flow available. It should show if it's getting clogged up with dirt or not. If you take the filter out you can gently tap it on the ground or gently blow it out with an air hose to loosen and dislodge any dirt or bugs that have accumulated. GENTLY is the key word here. You don't want to damage the air filter in any way that would let dirt enter the engine. This can cause MAJOR PROBLEMS in a diesel engine. (Think total rebuild) Make sure to re-set the filter minder back to 100% air flow when you're done. Also re-set it if you change the filter for a new one.

 

[ken wilkinson]

have had expierienced diesel mechanic from church out to look engine over with me, talk about preventive maint, we looked at filter housing, didnt see any gauges to indicated air flow, just how difficult it looked to access
engine has 28k

 

["EZ"]

have had expierienced diesel mechanic from church out to look engine over with me, talk about preventive maint, we looked at filter housing, didnt see any gauges to indicated air flow, just how difficult it looked to access
engine has 28k

I'm not familiar with your coach. My Holiday Rambler has the air filter in a side compartment at the rear of the coach. You just open the door and there it is! The filter minder is at the rear of the coach in front of the radiator where it is easily accessible to push the button to reset it. Hopefully we've given you enough things to check and watch out for. Hope it helps!