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Reman 5.3 afm/dod delete p0300 code

Reman 5.3 afm/dod delete p0300 code

Postby BuzzBait [OP] » Mar 07 2019, 5:09am

So I recently had my 2013 Silverado collapse a lifter at 103k miles. So I opted to purchase a reman motor from a usta be reliable source. I told them I wanted to delete the afm/dod and vvt. So I got the motor back , installed, and fired up and running, immediately got a p0300 code ( multiple misfire). With my snap on scanner I can see which cylinders are misfiring 1,4,6,7 all AFM cylinders. So I called the engine rebuilder and he said he put a non AFM cam with vvt. Great... so not what I wanted but anyways I can live with the vvt. So I thought my problem was the vvt being deleted on the ECM was causing the cam to be in a ( parked position) if u will. Had that turned back on , still same problem. Truck runs great at speeds over 30mph but coming under 30mph truck starts to almost die and code pops up with stability trac. traction control off, take off over 30mph and codes go offf ,truck runs perfect. With all of this going on I did a compression test. The 4 cylinders that are misfiring 1,4,6,7 are significantly lower in compression than 2,3,5,8. All of this is pointing towards the cam being a AFM cam in a motor with ls6/ non AFM lifters correct? The motor guy swears it’s not the cam but something going on elsewhere with my truck. I’m ask y’all for any and all advice on this situation. Right now I’m in this motor $3600 motor plus labor, they said that they offer a 3 year warranty but 2 weeks later they don’t want to do anything or say the problem is the cam.
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Re: Reman 5.3 afm/dod delete p0300 code

Postby nealinator » Mar 07 2019, 5:52am

What an expensive mess. Is the place you got the motor from local? If it was shipped to you that will be a nightmare....pulling it to send back for warranty work. Did they do the ECM programming or did you have it done separate?

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Nealinator's 5.3L 4x4 Z71 All Terrain   176,906 miles
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Re: Reman 5.3 afm/dod delete p0300 code

Postby BuzzBait [OP] » Mar 07 2019, 6:01am

The motor was done kinda locally, mooresville nc 3 hours one way. The ECM was done buy a separate shop which is within a few miles of the motor shop. They advertise warranty but it says nothing on my receipt about it. They’re offering me this, they won’t me to pull the cam send it to them and then they send it to Melling to have diagnosis and then they will send me a new cam of my choice. I don’t think this is the right way to do this. I’m not buying it for one second would you?
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Re: Reman 5.3 afm/dod delete p0300 code

Postby nealinator » Mar 07 2019, 2:48pm

That does not sound like a correct approach...unless they are trying to help prevent you from pulling the motor and taking it back to them complete. Either is a huge pain if you ask me. If it is not the cam...then you will still have to do some major work to pull the motor and send it back. Curious if you can drive your truck to them and have them diagnose in the truck so you dont have to do either?
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Re: Reman 5.3 afm/dod delete p0300 code

Postby BuzzBait [OP] » Mar 07 2019, 3:39pm

Yes I can drive the truck to them. They also cringe to the thought of me doing this. I have done some investigation ,and have found that they have a shop directly behind the motor shop. This shop does there installation and pulling motors down for warranty work , but they are claiming they don’t have anything like this, this information comes to me from a customer of theirs for more that 10 years, so they don’t know he and I know one another.
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Firing on 2 cylinders [L1]
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Re: Reman 5.3 afm/dod delete p0300 code

Postby BuzzBait [OP] » Mar 07 2019, 4:09pm

I just got off the phone with melling... which is the manufacturer that built the cam they installed, good company. He said that 10,000% sure it’s the cam. Also I did a compression test this morning again... 1,4,6,7 cylinders 145/150 lbs 2,3,5,8 cylinders 175/180 lbs. something else I’ve noticed as well is the truck doesn’t have really good power. I have a 2010 Sierra 35” tires 8” lift 190k factory original motor with AFM/dod turned off via DiabloSport. The Sierra has more power with all that going against it (lift,tires, miles). The 13 is completely stock it should have twice as much power especially with a brand new engine!!!!
Original Poster
BuzzBait
Firing on 2 cylinders [L1]
Firing on 2 cylinders [L1]
Posts: 25
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Joined: Apr 20 2017, 2:01am
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Year: 2001
Make/Model: Chevrolet Silverado
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Re: Reman 5.3 afm/dod delete p0300 code

Postby BuzzBait [OP] » Mar 07 2019, 4:29pm

Oh yeah the engine builder is saying this is normal compression, so it’s normal to have 25% less compression on the cylinders that are misfiring??? The same cylinders that are AFM cylinders??? I wish someone would tell me if this is correct what the engine builder is claiming or is he just making excuses trying to cover his work.
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Firing on 2 cylinders [L1]
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Posts: 25
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Joined: Apr 20 2017, 2:01am
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Year: 2001
Make/Model: Chevrolet Silverado
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Re: Reman 5.3 afm/dod delete p0300 code

Postby nealinator » Mar 07 2019, 5:09pm

Seems like the cam experts are agreeing with you. I would think all cylinders should be near the same.
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