Troubleshooting
Common problems from real builds, and where the fix lives.
| Symptom | Likely fix |
|---|---|
| Running hot | 3.8 upgraded radiator + shroud, push/pull fans, oil cooler, Corvette spacing on BK1 — Cooling |
| Hot spots, temps creep, cooling system won't bleed | Steam vent line missing or routed wrong; run it to just below the radiator cap — Cooling |
| Melted wiring / burning smell near fuse box | Header too close to the fuse box or harness; add clearance and shielding — Exhaust |
| Can't get DBW pedal to work with Holley | Needs a 6-pin pedal + Terminator X Max with the right harness — Gas Pedal |
| Fans come on at key-on | Disable key-on fan operation in Holley — Cooling |
| Wild intake air temp readings | IAT in hot radiator air; relocate to the back of the intake — Cooling |
| Battery not charging | Alternator needs a resistor-equipped trigger; set Holley input to digital frequency — Alternator |
| Won't crank with push to start | Ground the starter relay, then use the pink wire — Wiring |
| Holley drops out while cranking | Feed ECU power from the driver's fuse box ECU slot — Wiring |
| Fuel tank building pressure | Vent the EVAP line to atmosphere — Fuel System |
| Power steering leaks / heavy steering | Use the correct adapter and a pressure reducer; Pentosin CHF 202 — Power Steering |
| Odometer stopped after ABS delete | Keep the ABS module plugged in — Brakes & ABS |
| No speedo on Holley dash | Wire the VSS to J4 or update to V3 software — ECUs & Tuning |
| No reverse lights | Reverse switch pigtail and relay wiring — Wiring |
| Cabin / pedal area too hot | DEI tunnel shielding plus exhaust wrap — Heat Shielding |
| Broken axles | Sedan -LAM axles to ~600 hp; Ford 8.8 IRS beyond — Differential & Axles |
Community & Parts Links
- Swapped GCs (Facebook)
- Genesis Coupe LS Swaps (Facebook)
- All-year shop manuals & wiring diagrams (Google Drive)
- Sikky LS swap kit
- LOJ Conversions
- ISR Performance mounts
- Jason Riddle / Dream Machine Z
Sources & further reading
Prices and part numbers were checked in October 2026 and can change. Always confirm with the vendor before ordering.