East Texas LS Swap and EFI Tuning
Midgard Industries is based in Longview, Texas and tunes LS swaps, Holley and ACES EFI, and GM factory ECUs for customers throughout East Texas, including Tyler, Longview, Gilmer, Kilgore, and Marshall.
Areas served in East Texas
Local by-appointment support is available for LS swap and EFI projects in:
- Tyler, TX: about 45 minutes west on I-20. Tyler builders often bring cars in for first starts or mail in a PCM.
- Longview, TX: home base. In-person appointments for LS swaps, Holley, ACES, and HP Tuners tuning.
- Gilmer, TX: about 25 minutes north, with plenty of trucks and classic swaps.
- Kilgore, TX: about 15 minutes away, an easy drive for logging sessions.
- White Oak and Gladewater, TX: just west of Longview along US-80.
- Marshall, TX: about 25 minutes east on I-20.
- Henderson, TX: about 35 minutes south.
- And other surrounding East Texas cities
If you are outside the immediate area, remote tuning support is also available for qualifying combinations.
In person in Longview
Appointments are at the shop on Harley Ridge Rd in Longview. We log the engine, check the basics (fuel pressure, sensors, wiring), and tune with the vehicle running. This is the best route for first starts, idle problems, and drivability complaints.
Mail-in or drop-off PCM
For Gen III LS swaps on a P01 or P59, drop off or ship the PCM and get it back with a swap-ready mail-in LS swap base tune. Typical turnaround is 1-2 business days after the ECU is received.
Remote log-and-revise
Have HP Tuners, a Holley handheld or laptop, or ACES software? Send data logs and get revised tune files back. It's a good way to refine part-throttle fuel and idle once the engine already runs.
East Texas tuning questions
Where is Midgard Industries located?
723 Harley Ridge Rd, Longview, TX 75604. Visits are by appointment. Call or request a quote to schedule.
Do you only tune LS engines?
No. Holley and ACES systems are tuned on small-block and big-block Chevy builds too. See Holley EFI tuning and ACES EFI tuning.
What does an LS swap need before it will run?
At minimum, VATS removed and the injectors, MAP sensor, fans, and transmission set correctly. The LS swap startup checklist covers the full list.
Which PCM should I use for my swap?
Most Gen III swaps use a P01 or P59. See the P01 vs P59 LS ECU guide to choose one.
Don't want to tune it yourself?
Mail in your P01/P59 and get a VATS-deleted, swap-ready base tune for $100. Typical turnaround is 1-2 business days after the ECU is received.
