Holley Sniper EFI·Datalog Diagnostics·Sniper 1 & 2·Terminator X Free · No signup
Datalog Analyzer

Sniper Log Analyzer

Instant No PC software No account

Find out what your tune is actually doing.

Drop in a datalog and get a plain-English read on idle surge, AFR, timing, charging and RFI — in seconds. First EFI swap or fiftieth, no account or PC software required.

Drop files here or click to browse

.dlz · .dl · .sniper · .terx

For best results, include your config file and at least one datalog.

Up to 5 files · 100 MB total · 10 uploads per hour

Field guide

01
Pull your files off the SD card
Pop the SD card from your Sniper handheld and plug it into your computer. Look for:
  • Datalogs: Saved Datalogs\
  • Configs: HOLLEY\FW0200\Saved GCF\
The drive letter varies — check whichever drive your SD card mounts to.
02
Drop in a datalog (and your config)
  • Datalogs: .dlz or .dl files
  • Config: .sniper or .terx (Terminator X) global config file
Upload multiple datalogs to compare conditions — cold start, highway, idle. Including your .sniper or .terx config sharpens the analysis.
03
Get an instant read
We parse the log and run automated analysis on fuel trims, timing, IAC position, coolant temp, battery voltage and more — results in seconds. Want a human-style verdict? Opt in to a follow-up AI-assisted review with specific tuning recommendations, sent to your email.