Blower quits when going up hill or on first accelertion

Surges under load but only while going uphill Page1 - Chevy High ...

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Mar 6, 2011 - 14 posts - ‎8 authors
Trying to help out a friend. ... The truck starts, runs, and drives fine until you get to a hill. When going up hill it begins to surge, almost stalling but not quite. ... rubber fuel lines suck shut under a heavy load and act like that. .... tranny fluid level o.k.? ya got me stumped. runs great when it's on a flat surface?

Ford 460 engine - RV mechanic

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Will not take gas going up a hill but will maintain speed at 55 mph. ... Want to do a diagnostic test on my 1997 F250 with 460 engine. ... only get to about 40 miles an hour if i push it the engine acts like its running out of gas,thank you .... The truck hesitates on acceleration, while driving on flat surface is fine, however climbing ...

rough idle, stalling, loss of power. - CarGurus

It is almost certainly due the drop in manifold vacuum when climbing hills or accelerating. Back in my youth windshield wipers stopped when you stepped on the gas.

try checking your crankshaft or tps throttle position sensor it could cause you to lose power at times

Check your points and condenser their shud be enough spark der

You probably have a vacuum controlled mode switch and there may be a vacuum leak in the engine compartment that is causing your system to default to defrost when engine vacuum is low (such as when accelerating or going uphill). See if you can find the vacuum line that comes from the engine intake manifold to your heater control panel, make sure the hose isn't loose or cracked at the manifold. The vacuum line is a small plastic line that comes out of the firewall and goes to the engine. Also check out any other hoses in the area. If all of these are OK, it may be that your mode switch is leaking a bit. If you have questions, please let me know.

Try changing the fuel filter. If it's been there awhile it's probably starting to clog and won't be able to flow enough fuel for the heavier demands the car has when going uphill or trying to accelerate hard.

Have you noticed that the AC quits blowing cold air when you are heavy on the throttle, or climbing a hill? Does it return to blowing cold air when you let back off the throttle and relieve the load from the engine?

If you answered YES to those questions, your AC is operating normally. AC compressors take quite a bit of power from the engine to operate. In vehicles with smaller engines, the AC compressor will disengage when there is a heavy demand for power placed on the engine, and you will not get cold air. When that demand is gone, it re-engages power to the AC compressor.

there should be a vacuum line running by the drivrs side shock tower that might be unhook are cracked

Check for a vacuum leak. WHERE is the magic question.

All Toyota auto trans cars downshift when descending a hill when you tap the brake. This is called "Downhill Shift Logic"; what this is for is to eliminate the double shift when you come to the bottom of a hill and then accelerate. Normal condition. Usually happens above 38 MPH.
Also: The cruise will accelerate when going uphill. Normal condition.Plus: The cruise will not disengage back to the set MPH after you top the hill. Toyota recommends to disengage the cruise when encountering steep terrain.