Help diagnosing 05 vortec swap!!
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Teching In
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Help diagnosing 05 vortec swap!! Vortec Swap Issues:
I bought a 2005 L59 5.3L from a wrecking yard an a 4L60e (unknown year although it did have the earlier year park neutral single plug switch that I changed out with a later model dual plug switch) that I put into a 1967 Toyota Fj40. I used a 2wd transmission that I took the tail housing off and cut the output shaft down and used Advanced Adapters kit with clamp on reluctor ring and VSS to mate to my landcruiser transfer case. I reworked the harness my self and had the computer flashed.
My problem is that my vehicle thinks it is going 125 mph when it is going 35-40mph... Originally thought it was a bad VSS sensor so I changed it and it still does it. Then I thought it was my gaping between the VSS and reluctor gear so I checked it and reset it at 0.011" like Advanced Adapters recommended. Did not fix the issue. I then bought a new ECM from pick and pull and had that one re-flashed by someone else and it did not fix the issue. I tore my harness apart so check to see if I had a short somewhere and the harness looks great. Each time I had my ECM flashed I made sure to specify gear ratio, tire size, and what pulse per revolution my reluctor gear is. If i put my vehicle in drive and let off the brake to just coast, it thinks I am going 33mph.
Does anyone have any Ideas or has anyone ever encountered this before? TIA
I bought a 2005 L59 5.3L from a wrecking yard an a 4L60e (unknown year although it did have the earlier year park neutral single plug switch that I changed out with a later model dual plug switch) that I put into a 1967 Toyota Fj40. I used a 2wd transmission that I took the tail housing off and cut the output shaft down and used Advanced Adapters kit with clamp on reluctor ring and VSS to mate to my landcruiser transfer case. I reworked the harness my self and had the computer flashed.
My problem is that my vehicle thinks it is going 125 mph when it is going 35-40mph... Originally thought it was a bad VSS sensor so I changed it and it still does it. Then I thought it was my gaping between the VSS and reluctor gear so I checked it and reset it at 0.011" like Advanced Adapters recommended. Did not fix the issue. I then bought a new ECM from pick and pull and had that one re-flashed by someone else and it did not fix the issue. I tore my harness apart so check to see if I had a short somewhere and the harness looks great. Each time I had my ECM flashed I made sure to specify gear ratio, tire size, and what pulse per revolution my reluctor gear is. If i put my vehicle in drive and let off the brake to just coast, it thinks I am going 33mph.
Does anyone have any Ideas or has anyone ever encountered this before? TIA
Last edited by Pmahoney; Mar 9, 2020 at 08:21 AM.
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This issue is in High range and low range, or just high range or just low range? Thats can be one of the issues with 4wd swaps, the computer doesn't know which transfer case range is selected, and one or the other will be off by the t-case ratio.
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Joined: Jan 2006
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did you adjust the tire size/gear ratio in hptuners?
having a similar issue in my mustang since i was showing crossing the traps at 125 but the slip said 105. found the settings for tire/gear was set to 30.1/3.73 and my car has 26/4.10. made my shift points goofy as well.
having a similar issue in my mustang since i was showing crossing the traps at 125 but the slip said 105. found the settings for tire/gear was set to 30.1/3.73 and my car has 26/4.10. made my shift points goofy as well.
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Teching In
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Yep. Tire size and gear ratio both changed. Although, currently it has 33” tires but it’s “tuned” for 37” tires because that’s what I’m going to run. Even so, the difference in tires shouldn’t throw my reading off that far. It says 125mph when I’m going 40mph. The tire size being off would only change the speed by maybe 5-10mph
