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if your engine light is on you can stop at most any auto parts and they will plug into it free and let u know exactly the problem is most hesitations start with simple solutions if u get them soon there r many things which will cause hesitation dirty air filter number 1 cause alto if i was u i would take the guess work out swing into a autozone oreillys napa any 1 of those will plug into it get the code and tell u what is wrong and clear it for u too
check the drive shaft "U" joints and slip joint for bad wear . If you have a centre bearing check it for serviceability. pull the plug in the diff and check the magnet for metal bits.
do a stall test, like start engine let it run then hold the brake pedal with your other foot raise rpm to put load on engine if you feel the hesitate then it could be spark plugs wire or injectors
hope it helps
If the car starts to hesitate at right around 2000 to 2300 RPMs then the EGR ports on the intake manifold need to be cleaned out. The exhaust gas is flooding only one cylinder and causing the hesitation(misfire of that flooded cylinder) since all the other ports are blocked off with carbon build-up. This happen right when the EGR valve opens, letting in the exhaust gas. To find out if this is indeed your problem, remove and plug up the rubber vacuum hose going into the EGR valve and drive the car. If it stops hesitating, that's the problem.
Load issues can be anywhere along the drive train. Put the car into gear with your foot on the brake and BRIEFLY press on the accelerator - if the engine misses/hesitates, the problem is with usually with the engine. If not, it's probably in the transmission, u-joints on the drive shaft or the rear differential. If it's the engine, you will need to do all the usual checks (throttle body, EGR, fuel pressure, etc.).
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