Clean the throttle body and change the maf. i had this problem hard to accelerate between 35 and 50 and would almost die when idling for a while changed mass airflow sensor cheaper on ebay 38 and i can of cleaner it too 2 cleaning after that it runs better now
SOURCE: Hesitation problem
try cleaning the inside of the MAF sensor and do the following procedure as well.
Here is the most common cause of surges and stalls at stops and low erratic idle speed and rough idle, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
SOURCE: 2000 nissan xterra hesitating when engine is warm
We are having the same problem. We are right now changing the crankshaft position sensor along with the intake and manifold gaskets.
SOURCE: 2000 ford excursion hesitates at speeds of 45mph and 55mph
Could be several things, when was the last tune up? A coil may need replacing on one of the plugs and the catalytic converter could have some blockage and creating backpressure on the engine. Also fuel injectors may need cleaning by adding it to the fuel or a bad injector.
SOURCE: I have an 2002 Honda Odyssey. hesitates at 45-55mph
change fuel filter, check fuel flow and preasure.
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