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barry1982 · 04-10-2018, 10:52 AM

Thanks 4x4k30..... will give that a try. Can't hurt at this point. I heard you can test the map sensor as long as the truck will run. If truck is idling, unplug map sensor. If truck dies....map sensor good. If truck keeps running....map sensor bad. Don't know if it's true....but read it some where. Also picking up a gauge to test fuel rail pressure. Guess it's supposed to be around 50 PSI if pump,lines are okay.

04-10-2018, 10:52 AM	#3
barry1982 Registered User Join Date: Oct 2015 Location: Waskatenau, Alberta Posts: 259	Re: 2005 gmc 1500 5.3 z-71 Thanks 4x4k30..... will give that a try. Can't hurt at this point. I heard you can test the map sensor as long as the truck will run. If truck is idling, unplug map sensor. If truck dies....map sensor good. If truck keeps running....map sensor bad. Don't know if it's true....but read it some where. Also picking up a gauge to test fuel rail pressure. Guess it's supposed to be around 50 PSI if pump,lines are okay.