Jump to content

5.3 Engine Shuts Off

uncle joe

Recommended Posts

uncle joe New Member

uncle joe

Posted
Posted

I am having trouble with a 5.3 in my z71 half ton.

It started when towing a trailer, the engine shut down as if you turned off the key. When I got it home I was checking the fuses and my son said there was a code showing, this was odd because the mil was not on. The po101 code was cleared with the reader and the truck cranked. It ran a few hundered yards from the drive and shut down again. Still no mil light, but same code, reset and cranked. I am on the third maf now and still have the same problem. I have had bad maf's on other cars and the symptoms were different. It is at a shop now and they get the same thing I did. They are going to check the wires between the maf and the pcm tomorrow, but I don't hold much faith they will find the problem. Before this the truck ran fine. It has 40-50 psi fuel pressure, new fuel filter.

Any one have any ideas??

JE

angelic0- Enthusiast

angelic0-

Posted
Posted

I'm shooting for a problem with the immobilizer, might be your key and might be your module..

 

I do not recall the GASSERS to shut down on 10psi lack, they would rather have powerloss issues and a following error in the gauge cluster.

 

A MAF/AFM would act the same, plus a choking sound.

uncle joe New Member

uncle joe

Posted
  • Author
Posted

if it is the immobilizer it would have to be with the receiver, he has a different key than the one I use. Is this in the PCM or is it a seperate module?

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      Oil Consumption

      By Chuck FB · Posted

      Ok that confirms the extra quart theme they are still going with which must mean they have noted some initial use more so then some engines and probably the bigger factor in all of this probably isn't the engine so much as its the insane distance or OLM that lulls a lot of the driving public into driving their new vehicle off the lot and not even doing one short interval oil change because the manufacturer doesn't say different and if the dealer follows that logic as well. Selling the rarely needing to be serviced concept seems to go over well with the public that wants to get away with as little as possible for dollars spent on the vehicles maintenance and I bet there are 3.0 engines just like other vehicles out there that never have their oil checked by the owner which goes back to why they probably felt the need to add that extra quart to avoid a costly theme.    Speaking of cutting filters open, it was probably over two years ago now that a youtuber who buys vehicles to do longer term reviews and pulls a fifth wheel through the mountains of Colorado on summer trips and that becomes part of the testing. Anyway he had a GM HD with the 6.6 gas and a Ford 250 with the 7.3 gas at the same time and of no surprise the Ford had more power etc but somewhere along the way in the few thousand miles he put on the truck, he changed the oil and was seeing glitter and cut open the filter and yeah, things were not looking spectacular. The truck about that time or soon after seemed down on power compared to what it had been and then threw some engine code, I expect the cam/lifters were failing and so he brought the truck back to the dealer and made some deal to get out of it as he knew it would sit for months waiting on a new engine as they were so backlogged at the time. He kept the GM for some time after that using it exclusively until he sold it after buying his next vehicle to do a review on. Definitely the filter can tell a story when things are starting to go sideways, but it would be a sickening feeling to cut it open and be faced with an ugly mess like that and be running a magnet through the pleats and the oil on the dirty side of the filter and see all the fines sticking to the magnet.    The dealer may have some ideas based on experience as to where that coolant smell is coming from, I would imagine if they can't find it but its smelling they would put dye in it to they could give it a run cycle and use the black light to see where it pops up, if its a hose connection, water pump, rad or even a head gasket etc. 
    • riddler
      Torsion adjustment

      By riddler · Posted

      Good looking truck, suspensionmaxx looks like a solid option
    • riddler
      Torsion adjustment

      By riddler · Posted

      Thanks for the info, im considering a leveling kit or 4" lift kit.
    • davester
      frustrating P0446 code

      By davester · Posted

      charm.li (website) has the vehicle-specific diagnostic procedure for that code, you can use to find what the cause of it is.
    • KARNUT
      Oil Consumption

      By KARNUT · Posted

      It’s at the point of amusement. I’m retired I have time. It’s fun seeing people try to convince me I’m using oil. I’m buying oil at the prescribed time. It gets drained and new goes in. Do I add in between, no. My oil doesn’t even get dirty in 5k miles. I don’t even see any drop on the stick. I check in the same place. All is well.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...