No fuel delivery is fine im sure i was having same issue thought the same thing so i changed fuel pump. Still same thing try checking your rear drum brakes under neath the rotor that are for your emergency brake your ebrake is sticking inside the drum everything is old and prolly needs replaced try checking the brakes jack it up and try turning one rear wheel then the other one wen ebrake is down and wheels are in the air the rear wheels should spin freely if not then the drum brakes r sticking check it out like isaid i had same issue and spent money that didnt need to be spent
SOURCE: 2004 dodge caravan 2.4 Hesitates during Acceleration and at idele
You should definitely replace the fuel filter though this probably won't fix your hesitation. It wouldn't hurt to replace the spark plugs this is usually the culprit on these engine. I have the same engine in a '99 caravan and found the for some reason the spark plugs on cylinder 3 and 4 loosen up after one year and cause a misfire between 45 and 50 mph under load (when mildly accelerating).
SOURCE: 2000 Hyundai Elantra Transmission problem
I don't know if I can help but as an owner of a Hyundai Elantra 2000 GLS with 205,000 miles and the original clutch and transmission I'll try and help!
I always start with the lowest cost solution first and avoid mechanics as much as possible!
Have you checked the trans fluid?
It should be changed every 30,000 miles!
Sometimes a Lucas Trans Fluid will cure - fix slippage!
Have you checked for a clutch adjustmet!
An adjustment can cure - fix slippage!
Are you a clutch rider with your foot always on the clutch?
If so you may have worn out the clutch!
How many miles to you have on your Hyundai Elantra 2000?
SOURCE: accelaration loss of power
I'd have a fuel pressure test done to be sure, it isn't fuel related again. Takes 5 or 10 minutes so cost should be minimal. The other thing that comes to mind is a plugged exhaust. (catalytic converter) Quite possible on a 10yr.old vehicle.
SOURCE: loss of power
You should have your cat. checked make sure there is no restrictions in your exhaust system.
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