PCM swap in an I6 Envoy...
- Vetteyog
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2004 GMC Envoy XL
PCM swap in an I6 Envoy...
Question for the masses, I have a 2004 GMC Envoy with the i6 engine. I'm wanting to be able to tune this vehicle, but there is basically no free support for it, and I'm not ready to invest in HP tuners or EFI live. My thought was to take a P59 from a 2004 4.3l and repin my harness to use that PCM. I have compared both harness pinouts, and the only connection I do not have on the P59 the control for the variable valve timing. The firing sequence is different as well, but I figured I could just repin the harness so the V6 and firing order matches the I6 firing order. I'm sure there's other stuff I'm missing as well, but in my mind it sounds like iy could work. Anybody have any thoughts?
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Re: PCM swap in an I6 Envoy...
Not to discourage you, but I bought a used hptuners interface with 6 credits on Ebay for $300. It would be far, far less work if it supports tuning an i6. Time equals money for most of us, so I can't imagine swapping to a p59.
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Re: PCM swap in an I6 Envoy...
What is the count on the crank reluctor wheel?
I'm running a inline 6 Jeep engine on a 4.3l P59 and it runs pretty good. The only thing on it besides the engine is the cooling fans.
But I don't have any accessories on it no AC, fuel gage or anything.
I'm running a inline 6 Jeep engine on a 4.3l P59 and it runs pretty good. The only thing on it besides the engine is the cooling fans.
But I don't have any accessories on it no AC, fuel gage or anything.
Bad things happen FAST!!!
- Vetteyog
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2004 GMC Envoy XL
Re: PCM swap in an I6 Envoy...
It's a 24x. I'd like to get all my gauges and everything working correctly.Thorwon wrote:What is the count on the crank reluctor wheel?
I'm running a inline 6 Jeep engine on a 4.3l P59 and it runs pretty good. The only thing on it besides the engine is the cooling fans.
But I don't have any accessories on it no AC, fuel gage or anything.
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1987 YJ
1955 CJ5
1988 MJ Comanche - Location: Commerce GA.
Re: PCM swap in an I6 Envoy...
I'm using a 3x reluctor. I don't know of a V6 application that uses a 24x.Vetteyog wrote:It's a 24x. I'd like to get all my gauges and everything working correctly.Thorwon wrote:What is the count on the crank reluctor wheel?
I'm running a inline 6 Jeep engine on a 4.3l P59 and it runs pretty good. The only thing on it besides the engine is the cooling fans.
But I don't have any accessories on it no AC, fuel gage or anything.
But I'm no expert.
Maybe somebody that has more knowledge about it will chime in.
It might be interesting to try a 24x on my Jeep engine just to see what it would do.
Bad things happen FAST!!!
- Vetteyog
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- Joined: Thu Dec 01, 2022 3:11 am
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2004 GMC Envoy XL
Re: PCM swap in an I6 Envoy...
I didn't think of that. The P01 is a 24x, but only 512 Kb.Thorwon wrote:I'm using a 3x reluctor. I don't know of a V6 application that uses a 24x.
But I'm no expert.
Maybe somebody that has more knowledge about it will chime in.
It might be interesting to try a 24x on my Jeep engine just to see what it would do.
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Re: PCM swap in an I6 Envoy...
Only the v8 are 24x
Re: PCM swap in an I6 Envoy...
From the factory...Cincinnatus wrote:Only the v8 are 24x
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Re: PCM swap in an I6 Envoy...
24x is 4.8l, 5.3l, and 6.0l coil on plug v8, 3x is 4.3l v6 with distributor, 4x is 5.0l and 5.7l with distributor, and 8.1l with coil on plug exists (I'm not sure what pcm or reluctor it uses). The i6 is a 7x. Even if you change it to 24x, no v6 ever used a 24x p01 or p59. If you go to 3x, not sure how you could control spark without a distributor.
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Re: PCM swap in an I6 Envoy...
Can I ask what you are looking to tune with your truck? I might be able to help if it is simple. You can read the PCM (P10) with PCM Hammer, send me the bin and I can change and then send back to you. Then you reflash using PCM Hammer. I am using Jet Tuners to tune. Let me know if this helps.Vetteyog wrote:Question for the masses, I have a 2004 GMC Envoy with the i6 engine. I'm wanting to be able to tune this vehicle, but there is basically no free support for it, and I'm not ready to invest in HP tuners or EFI live. My thought was to take a P59 from a 2004 4.3l and repin my harness to use that PCM. I have compared both harness pinouts, and the only connection I do not have on the P59 the control for the variable valve timing. The firing sequence is different as well, but I figured I could just repin the harness so the V6 and firing order matches the I6 firing order. I'm sure there's other stuff I'm missing as well, but in my mind it sounds like iy could work. Anybody have any thoughts?