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05 Trailblazer idles rough and stalls
07-03-2009, 03:42 PM
I have an 05 4x4 trailblazer that idles rough and stalls when the vehicle is turn sharply or if the a/c is turned on. Vehicle has a jumping feeling when put in drive or reverse. Receive code (P0301 Cylinder 1 Misfire Detected) when diagnosed. Freeze frame data as follows:
07-03-2009, 03:43 PM
Only work i have performed so far have been a throttle body cleaning and spark plugs have been replaced.
07-03-2009, 07:29 PM
Pull #1 plug see what it looks like, did this start before or after the work was done?
07-04-2009, 02:31 PM
Vehicle had problem before changing plugs just was not as severe as it is now. Plug #1 had the normal signs of an old plug but nothing that showed any other problems.
07-04-2009, 04:10 PM
Without actually looking at the truck, does it have a low speed misfire like a bad plug? If so confirm the #1 coil is working, switch it with another cyl see if the misfire code moves with it, also if it has a dead misfire and the coil and plug are good, a compression test is in order.
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