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Cylinder 1 Misfire

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Old 09-17-2012, 11:04 AM   #1
McJoe [OP] McJoe is offline
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Cylinder 1 Misfire

hello, my dads 99 taco 2.7 is having a p0300 and p0301 code. i have already replaced the spark plugs, wires, and coils and still having trouble. what else should i look for?
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Old 09-17-2012, 11:25 AM   #2
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Do a compression check make sure cylinder 1 is not low. first

check fuel filter? Bad injectors, Bad fuel, or fuel pump pressure is low also.

Clean your maf. also.

Reset the ecm. or pull the battery for about a minute. see if the code returns.
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Old 09-25-2012, 05:07 PM   #4
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Ok so the code came back after reset. put in new injectors and some fuel additive. after adding additive it runs worse and throwing new codes?! p1300 and p1310. those are are shorts in the wiring or ecm, but installed all new coils, wires and plugs. does this mean i have a bad ecm?
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Old 09-25-2012, 05:10 PM   #5
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Also, the coils are aftermarket from Oriellys. should i have gone with the dealer on this one?
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