05 GTO problems - PLEASE HELP - Pontiac GTO Forum
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post #1 of 12 (permalink) Old 08-29-2010, 09:26 AM Thread Starter
 
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05 GTO problems - PLEASE HELP

I bought a 05 gto yesterday running perfect. This morning on my way to work it began running erratically kind of pulsing and then went in to safe mode. I pulled over and put it in neutral and the engine was running from about 700 up to about 1200 rpms on its own so i shut the car down. Now when i try to start it it doesn't even turn over. My first thought was maybe a fuel pump but i dont know why that would cause it not to even be able to engage the starter. I'm not familiar with computerized engines and any help would be very appreciated. Thank you

-Zach
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post #2 of 12 (permalink) Old 08-29-2010, 09:29 AM
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Could be a dead battery, do you have any dash lights? Headlights? Car's in park or nuetral when trying to start, right?
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post #3 of 12 (permalink) Old 08-29-2010, 09:36 AM Thread Starter
 
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I have all my lights and yes the car is in park when trying to start. It's like the computer is holding the starter from engaging
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post #4 of 12 (permalink) Old 08-29-2010, 09:47 AM
 
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I have all my lights and yes the car is in park when trying to start. It's like the computer is holding the starter from engaging
Just because you have lights doesn't mean the battery is good. There could be a deal cell or even the terminals could be dirty.

Also I would check you plugs too.
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post #5 of 12 (permalink) Old 08-29-2010, 09:51 AM
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Did you buy it from a dealer or a private party?
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post #6 of 12 (permalink) Old 08-29-2010, 10:11 AM Thread Starter
 
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Thanks but i'm certain it isn't the battery, it's a pretty new battery and the terminals are clean, reading 12.4 volts. I bought it private party
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post #7 of 12 (permalink) Old 08-29-2010, 10:55 AM
 
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If it went into safe mode, I'm sure it threw a code. Use a scan tool and see what the problem is. It will scan with just the key on, not started. Good luck.

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post #8 of 12 (permalink) Old 08-29-2010, 11:08 AM
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I have all my lights and yes the car is in park when trying to start. It's like the computer is holding the starter from engaging
Have you tried to start the car in neutral?


Sounds like it might be time for a piggyback ride to the dealer for proper diagnoses.
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post #9 of 12 (permalink) Old 08-29-2010, 01:52 PM Thread Starter
 
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Ive got an update, went and looked under the fuse box and found the engine sensor fuse blown. I replaced it and it started up and ran great... For about a minute then it did the same thing. I popped the cover and sure enough the fuse was blown again. Any idea's on what's causing it?
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post #10 of 12 (permalink) Old 08-29-2010, 02:34 PM
 
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It happened while driving, so there's a short somewhere. Because it surged it could be MAF or O2 sensors. Many have also had a bad throttle position sensor cause the same behavior, but the fuse didn't blow.

Does the car have an aftermarket intake, headers, or anything else done? Headers could burn through the O2 sensors and too many people have installed intakes incorrectly.
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