MIssfire On Acceleration

PONTIAC GRAND AM
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RORIO
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Pontiac Grand Am 2.4L Automatic/92,000 miles...No problem starting , or accelerating slowly..Getting a missfire when accelerating hard to get into traffic, or on freeway at low RPM`s.I had it in shop and they were stumped as well as i am. I replaced the fallowing in order. Crank Shaft Position Sensor, Spark Plugs with AC delco PLatinum, Plug wires, both coil packs and housing, Fuel pump , fuel filter, Intake temp sensor, Oxygen sensor, ECU diagnosed and was good, all fuel injectors were ticking. I also cleaned the intake with with carb and chocke cleaner after all these were replaced(was verry filthy) and then replace the plugs once more. It got a lil better but not much. Please help me and give me your insight. I have been spending to much money on the little stuff and just want the problem fix.. Thank you ![img:a40b2f2610]http://www.2carpros.com/forum/automotive_pictures/75528_picture_108_1.jpg[/img:a40b2f2610]
May 23, 2007 at 1:06 PM
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2CARPRO JACK
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Try measuring the resistance across the injectors with a meter and get back at me
May 23, 2007 at 2:45 PM
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RORIO
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[quote:d2ccfd1520="2CarPro Jack"]Try measuring the resistance across the injectors with a meter and get back at me[/quote:d2ccfd1520]

I measured the resistance and they all came back the same , 0.0 and .02 ... if i was on the right setting or not , they were still the same all across, while i had them out i soaked the bottom of the injectors in carb and choke cleaner for about an hour. i also replaced the o-rings.
Jun 6, 2007 at 1:13 PM
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TBDK
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I would check and make sure the timing is on perfectly. If it's off just a bit it may do that. Also how is your air filter? May need replacing. Hope this helps in the slightest.
Jun 22, 2007 at 10:19 PM
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