A car may hesitate when you accelerate due to several factors, including a clogged fuel filter, which restricts fuel flow, or a malfunctioning fuel pump that fails to deliver the necessary pressure. Issues with the ignition system, such as worn spark plugs or ignition coils, can also cause misfires that lead to hesitation. Additionally, problems with the air intake system, like a dirty mass air flow sensor, can disrupt the air-fuel mixture, resulting in poor acceleration response. Regular maintenance can help identify and rectify these issues.
A faulty fuel pump would cause your Navigator to hesitate when you accelerate. Bad gasoline could also be at fault.
Change the fuel filter and have the cat convertor checked out
Sounds like it could be a dirty fuel filter, try taking it off and cleaning it.
no
A leak in the brake booster is one common reason why a car would stall or hesitate when the brakes are pushed. There could also be an obstruction in the brake line.
Timing chain - sloppy?
low trans fluid level.
Because you bought the 1.6. Get a 2.0D and the problem will go away.
There must be a restriction within the intake. Snow? ice? Mark
A car goes faster when you accelerate. It slows down when you brake.
5,400
if you have fouled sparkplugs then the car will hesitate when you accelerate, seeming to 'miss' a step or two. if it's a clogged throttle body, the car will just act sluggish, gas mileage will go down and the accelerator might stick a bit when you try to step on it.