• Home
  • About
  • Contact Us

CLUNKBUCKET

Everything but the same old cars

  • Car Care
    • Tool of the Week
  • Vortex of Awesome
    • Odd Rod
    • Eventage
  • Junkyard Chronicle
  • Feature
    • Cole Coonce’s Cam Grind
    • Diploma of Heroism
    • Opinion and Editorial
  • Misfit Toys
  • Project Buckets
    • 1982 Toyota Starlet
    • 1987 Mitsubishi Starion
    • Restification

Tool of the Week: Mitsubishi ECI Checker

June 4, 2015 By Mike Bumbeck

mitsubishi-eci-checker-2One of the great laments of the mothballs-in-their-pants set of the vintage car world is the demise of carburetors. These newfangled kids don’t know how to adjust a carburetor with a shoelace, crumpled up Chesterfield, and piece of elbow macaroni. Fuel injection is all part of a larger Trilateral Commission conspiracy to keep track of our special thoughts. And so on. Don’t get us wrong. We like carburetors just fine, but seeing as the last production carbureted cars included the 1990 Subaru Justy and Buick Estate Wagon, chances are better than average that the car you’re driving has electronic fuel injection. Time waits for no one, and few would argue with butter-smooth power delivery and drama-free cold starts delivered by fuel injection. Things can and do go wrong.

mitsubishi-eci-checker-1The 1987 Mitsubishi Starion ESI-R uses something in between a carburetor and multipoint fuel injection known as throttle body injection, or Electronic Controlled Injection (ECI) in Mitsubishi parlance. Unlike multipoint fuel injection systems which feature an injector for each cylinder, the Starion uses only two fuel injectors – one primary injector for idling and part throttle driving, and a secondary injector for full or wide open throttle turbo boosted entertainment. This arrangement functions similar to the primary and secondary bores in a carburetor such as a Thermoquad or Quadrajet. Like a modern automobile, the Starion has very large array of sensors which telegraph realtime information to the engine computer, which uses this data to deliver fuel and spark for butter smooth engine operation. Usually.

Getting back to the elbow macaroni and Chesterfield for a minute is the news that computerized engine management and available electronic diagnostics equipment have come a very long way since the Starion was built. Shown here is an example of engine diagnostics equipment circa 1985. This factory-issue Mitsubishi ECI checker runs multiple routines to check temperature sensors, mass air flow meter operation, oxygen sensor, throttle position sensor voltage – but not simultaneously. It took two people, a printed book of voltage tables and conditions, and about an hour of turning knobs and connecting a tangle of Medusa-like leads to run the tests. The result? Even after almost three decades, the electronic sensors and systems in the Starion passed.


A special thanks to the Chris Jensen for loaning us this genuine Mitsubishi ECI Checker and Mark Nelson for helping with the test.

mitsubishi-eci-checker-3

Filed Under: Car Care, Tool of the Week Tagged With: ECI Checker, Mitsubishi, Starion

Comments

  1. Andrew P says

    June 5, 2015 at 8:29 am

    What an awesome gadget. There is something magical about vintage diagnostic equipment, it just looks impressive. A DMM would probably do all the testing you need, but a DMM is so pedestrian these days.

  2. Brian says

    June 5, 2015 at 9:11 am

    Aw, man. I thought you were going to be testing Mitsubishi’s favorite feedback Mikuni on an old Pajero.

    To think I bought the old, carburetted truck to spare myself the “hassles” of contemporary turbocharged models. Pshaw! It’s the same 2.6 miles of vacuum hose – just condensed into a single cubic foot!

    Welcome back, sir. Welcome back.

Fix That Bucket

Tool of the Week: Heat Gun

The heat gun is one of those tools like the five pound sledgehammer which reveals its many uses as time passes. The idea is simple if not slightly … Continue Reading

Horn Switch Repair

Daily driving classic cars and trucks comes with benefits and pitfalls. 200,000 miles combined with 25 years can have deleterious effects on the … Continue Reading

Tool of the Week: Mechanic Stool

Sitting on a stool is a famously popular activity the world over. Add some slakey beverages, put the stool at a bar, and folks will part with … Continue Reading

Fix more...

Advertisements

Junkyard Chronicle

Mazda GLC Gone

From our rear-wheel drive hatchback division of junkyards past comes the Mazda GLC, or great little car. Like its Chevrolet Chevette and Toyota … [Read More...]

Peugeot 505 turbo wagon

Franco-American Turbowagon

From the well and truly forgotten department of Junkyard Chronicle comes this once mighty Peugeot 505 turbo station wagon. It is a mystery now why … [Read More...]

Forgotten Datsun

The two-tone paint scheme and space age styling of this Datsun 810 saloon would stun any junkyarder into full stop. While the Datsun might look … [Read More...]

More junkyard...

Be More Social

  • Facebook
  • Instagram
  • Twitter

Copyright © 2025 · CLUNKBUCKET a Pan Galactic Communications production