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PRODUCT / DIESEL PIGGYBACK
PHOTO 01 / 04PACKAGE CONFIRMED BEFORE PURCHASE

Controller

Diesel Piggyback Controller

Diesel piggyback controller for tuning a matched engine and factory ECU setup.

  • Piggyback Controllers
  • Controller
  • Diesel controllers
Reference unit price$437.97–484.09

Reference prices vary with exchange rates and the supplied package. Contact customer service to confirm the price, shipping and taxes.

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Reference unit price$437.97–484.09
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01 / About Diesel Piggyback

About Diesel Piggyback

A diesel piggyback controller for Isuzu 4JK1 / 4JJ1 projects, with three selectable modes. Check model year, factory ECU, emissions system and harness pins before installation.

02 / Specifications

Specifications

Application reference
Application stated for the supplied item: Isuzu 4JK1 / 4JJ1; vehicle fitment not verified
Item scope
Diesel piggyback with original ECU retained
Version identification
Current information lists code 009; whether it is a manufacturer part number and the corresponding hardware revision remain to be confirmed.
Electrical signal
Rail-pressure / boost / other controlled circuits require a wiring diagram

03 / Package contents

Package contents

The actual supplied contents are confirmed in the itemized quote. Check the following items before payment.

Confirm the diesel controller, vehicle harness and optional accessories; the engine name alone does not establish compatibility.

04 / Fitment & installation: Diesel Piggyback Controller

Fitment & installation: Diesel Piggyback Controller

  1. Check the model, hardware revision and connector pins against the device’s wiring diagram.

  2. Use the exact ECU wiring diagram; verify every circuit for continuity and shorts before connecting power.

  3. Check ECU faults, fuel-system condition, DPF / EGR operation and wiring before choosing a calibration. Mode selection must follow the actual controller instructions.

05 / Questions about Diesel Piggyback

Questions about Diesel Piggyback

Does the 4JJ1 name guarantee fitment?

No. ECU revisions, model years, emission systems and connectors vary. Supply ECU-label and connector photographs plus the vehicle year and engine details.

Is a specific power increase guaranteed?

No measured result is established for this item. Any target needs an agreed calibration plan and before / after testing on the actual vehicle.

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