03-28-2020, 04:43 PM | #1 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Lt1 swapped lt4 hpfp issue
Update: Harness 12689504 will be a direct swap for harnesses for anyone with a 2019 trying to upgrade the hpfp to the lt4 pump.
Original: Everyone that’s done the lt4 hpfp upgrade where the connectors the same. My connectors don’t match up. Lt4 pump 12694529 and my old pumps numbers 12697967. First pics new pump second is old. Anyone have any idea thought these are plug and play. 2019 camaro ss Injectors already swapped and d1x with 10 psi
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2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d Last edited by s3rics213; 04-03-2020 at 05:20 PM. Reason: Solved |
03-30-2020, 10:47 AM | #2 |
Drives: 17 Camaro SS 1LE & 16 Sierra AT CC Join Date: Nov 2016
Location: Norman, OK
Posts: 2,424
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My guess is that new "LT4 / HPFP" is the wrong pump. Have you cross checked the part # on it?
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2019 Corvette Z06 2LZ A8 - Halltech CAI, AWE non-catted X-pipe, Mamo V2 ported TB 592rwhp, bone stock 566rwhp
2017 Camaro SS 1LE - Procharger D1SC w/ Tial 2" BOV & Race intercooler / ARH full length catless headers / Alky meth injection system - 650rwhp on conservative tune SOLD |
03-30-2020, 11:48 AM | #3 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Yes the lt4 pump number hasn’t changed from 18 to 19-20 zl1. It’s the lt1 on the 19 that changed from the electrical. Even the dealership shows that the pumps completely changed on the lt1 and the lt4 stayed the same.
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2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
03-31-2020, 09:27 PM | #4 |
Drives: 2019 Camaro 1LE Join Date: Dec 2019
Location: Washington
Posts: 35
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I would like to hear more on this. My pump and injectors are on the shelf. Waiting on my supercharger to show up before I start the install.
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04-01-2020, 12:20 AM | #5 | |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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Quote:
Update: Looks like harness 12689504 will be a direct swap for harnesses for anyone with a 2019 trying to upgrade the hpfp to the lt4 pump. Will be swapping on Friday to verify.
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2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d Last edited by s3rics213; 04-01-2020 at 12:57 PM. |
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04-01-2020, 03:38 PM | #6 | |
Drives: 2019 Camaro 1LE Join Date: Dec 2019
Location: Washington
Posts: 35
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Quote:
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04-02-2020, 12:18 PM | #7 |
Drives: Anything I want Join Date: Oct 2008
Location: DfW - Texas
Posts: 5,405
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Swapping harness is the correct way to do this
We use the lt4 harness all the time from the camaro zl1 and corvette.
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04-02-2020, 08:54 PM | #8 |
Drives: 2019 1LE/ss 2014 ss/rs summit white Join Date: May 2016
Location: Charlotte
Posts: 131
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2019 ss/1LE d1x, LT4 fuel System, Triple meth nozzle, ported BTR, 2” Texas speed headers, Built 377 SPDC motor, CTporting heads, TooHighPsi port system, SMG aux.
1014/800 on E55/meth 890/750 on 93/meth Working on tuning the port system for full e. With questions just message me here for a faster response. https://www.facebook.com/eric.willia...ibextid=LQQJ4d |
04-26-2021, 03:20 AM | #9 | |
Drives: 2013 Camaro SS 1le Join Date: Sep 2018
Location: Ohio
Posts: 18
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Quote:
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04-26-2021, 12:52 PM | #10 |
Drives: 2016 Camaro 2SS Join Date: Mar 2018
Location: Chandler, AZ
Posts: 207
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I am also upgrading to LT4 fueling on my 2016 SS in preparation for an LT4 SC install. As far as I know I will need injectors, both fuel pumps and a voltage booster but having trouble finding the exact part numbers. Rock auto has half a dozen injectors for a 2017 ZL1 and I'm not sure which one is correct. Any help would be much appreciated. I also know I need to change my flex fuel to ZL1.
Also any other parts needed? How about a good install write up?
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Mr Russ
Tim "the tool man" Taylor is my hero My Garage: '16 Chevrolet Camaro 2SS, Summit White, Adrenaline Red -- Rotofab CAI, Soler TB, 1 7/8 coated LT's, Full 3" mids, 3" Stainless Works NPP mufflers, Flex Fuel, E85/91 tuned '20 Honda Oddysey Elite 25th Anniversary Edition --wifes car, she said "No more SUV's" after the 2 CX-9's totaled |
04-26-2021, 02:01 PM | #11 | |
Drives: 2016 Camaro 2SS Join Date: Apr 2018
Location: Central Texas
Posts: 1,011
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04-26-2021, 02:36 PM | #12 |
Drives: 2016 Camaro 2SS Join Date: Mar 2018
Location: Chandler, AZ
Posts: 207
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It's my understanding that the flex fuel kit is different for the LT4 vs. LT1
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Mr Russ
Tim "the tool man" Taylor is my hero My Garage: '16 Chevrolet Camaro 2SS, Summit White, Adrenaline Red -- Rotofab CAI, Soler TB, 1 7/8 coated LT's, Full 3" mids, 3" Stainless Works NPP mufflers, Flex Fuel, E85/91 tuned '20 Honda Oddysey Elite 25th Anniversary Edition --wifes car, she said "No more SUV's" after the 2 CX-9's totaled |
04-26-2021, 02:38 PM | #13 |
Dyno Show Queen LOL
Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014
Location: Houston
Posts: 4,345
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The top pic is exactly what came off my 2016 SS.. It was a direct swap for my LT4 pump off my 17 ZL1... I gave my wife's SS my LT4 pump and injectors I took the SS pump and injectors for my zl1. about 4 mos. ago one of my SS injectors off her car died so I just put all new Lt4 injectors and lt4 pump back.
LT4 pump I used GM 12688607 AC/Delco HPM1036
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Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber |
04-26-2021, 02:40 PM | #14 |
Dyno Show Queen LOL
Drives: 16 SS & 17 ZL1 Both Yellow Join Date: Jan 2014
Location: Houston
Posts: 4,345
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Not sure about flex fuel kit but definitely the AUX pump kit on a ss and zl1 are different most likely from the map sensor.
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Kong Ported 2650, Crawford Racing Port Injection, Weapon X 112mm Adapter, NW112mm TB, Livernois Ported LT4 Heads, Lingenfelter GT32 stealth cam, Haltech Elite, and Carbon by Trufiber |
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