01 3100 p0300 p0101 and p0480? - Chevy Malibu Forum: Chevrolet Malibu Forums
 
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post #1 of 3 (permalink) Old 03-01-2012, 10:31 AM Thread Starter
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01 3100 p0300 p0101 and p0480?

Hey there I have an 01 malibu 3100. I just replaced the engine for a friend his motor siezed. now starting it up it missfires and its throwing these codes. one is a coolant fan switch the other is random missfires and maf sensor. anybody have any ideas? thank you
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post #2 of 3 (permalink) Old 03-01-2012, 05:44 PM
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Re: 01 3100 p0300 p0101 and p0480?

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Originally Posted by jerytherew View Post
Hey there I have an 01 malibu 3100. I just replaced the engine for a friend his motor siezed. now starting it up it missfires and its throwing these codes. one is a coolant fan switch the other is random missfires and maf sensor. anybody have any ideas? thank you
How does it run under load? Single cylinder misfire or multiple cylinders? No leaks or damage to any vacuum lines, PCV breather pipe, intake flex pipe? Injector harness is properly routed to proper cylinders, right? These are sequential so a mismatch can produce a misfire. Sure catalytic converter is not restricted? Is cooling fan 1 plugged in (left side fan)? Does it run with A/C request? COOLFAN1 fuse in underhood fuse block is good? Does it have 12 volts available to it?
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post #3 of 3 (permalink) Old 03-03-2012, 01:33 PM Thread Starter
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Re: 01 3100 p0300 p0101 and p0480?

the upper intake was cracked, second one ive cracked this week. i dont know what the deal is with the fan
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