Hi I need some help with my 1997 Coupe. She's not running too well, it feels as if the car is ******* while we accelerate or drive up hills. She doesn't like having to pik up speed she arts then too.

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

hi,

check the transmission fluid. if its not this then I would suggest taking it in to a parts store to have the codes pulled on it..jm

usually an exhaust leak at the manifold,or a spark plug leaking

Look into exhaust, clogged cat conv. could cause that. Best way to test is a vaccum test on the intake. When exhaust is restricted the vaccum should go to 0 at the intake manifold while accelerating.

I know this is going to sound stupid. try changing the fuel cap. the check valve might be stuck open. or closed

Does it rev up in neutral ? Does it downshift when you come to a hill ?
Is the check engine light on ?

Check your universal joints in the drive shaft. When you remove your foot fromt the accelerator you are no longer applying power to the rear wheels and in turn there is no load on the drive shaft. When you accelerate below 40mph, there isn't enough centrifugal force to cause the driveshaft to wobble, but once you go above 40mph, it begins to show slop.

Another thing to check is your wheel bearings.

Possibly a plugged catylitic converter. This can cause to much back pressure and that will cause the engine to run poorly under acceleration or loaded conditions.

does it **** whike driving or just when ur changing gears?? do u have overdrive? going up a steep hill is going to be tough for a little motor anyway if u have o/d take it off overdrive before u start climbing the hill this will help u there if its some thing that just started happening let me know heres me email [removed by staff] if u feel comfortable plz email me here

hi there! i was a master tech 4 hyundai, first of all has the atf fluid been changed and at the correct level. or have you had the multifuntion switch checked? please feel free to contact myself and i will advise you as required with my exsperience

many thanks

Dominic Hill