2003 Nissan Sentra Car hesitate

2003 NISSAN SENTRA
140,000 MILES • 4 CYL • FWD • MANUAL
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DANIELKREPI
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When I drive my car with the ac on, regardless how fast I'm driving the car just stops (hesitate, almost like I'm downshifting it) randomly and the tachometer start wiggling up and down. I was told it could be the coil since I don't have a distributor.
Jul 29, 2009 at 2:29 PM
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RASMATAZ
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Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
Jul 29, 2009 at 2:36 PM
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DANIELKREPI
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I had my fuel injector cleaned at Wal-Mart, I noticed the problem reoccurring more when it rains or when the AC is on. The car pretty much stopped for a good 3-5 seconds and the tachometer wiggled by itself. A mechanic told me that it couldn't be the coil because the car was not shaking. He put it on a computer and didn't get any codes.
I was considering Firestone for a diagnostic but the want $90.00 for that price I might as well go to the dealer.
Jul 29, 2009 at 3:54 PM
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RASMATAZ
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Good choice on the dealer plus they're the ones that deals with your product
Jul 29, 2009 at 5:34 PM