- Problem Fuel Injectors -

Where they are and what to look for.

These problems can't be fixed by cleaning and the injector will need to be replaced.

If you injector is listed, one or more may exhibit the problem below.

Note: Any fuel injector can exhibit these issues but these injector are prone to have the problems listed.

JEC's side-feed - Coil windings will increase in resistance.

Nissan and Subaru (various top colors)

Verify the resistance is within 10% of each other. Normally 10-12 ohms.

JEC's side-feed - Coil windings will increase in resistance

Nissan and Subaru (various top colors)

Verify the resistance is within 10% of each other. Normally 10-12 ohms.
These also have issues with corrosion of the coil terminals causing intermittent operation. Fortunately the terminals can be cleaned during servicing.

Rochester Multec - Coil windings shorting out, decreasing resistance

Various GM late 80's to early 90's (gray or black top)

Verify the resistance is within 10% of each other. Normally 12-16 ohms.

Siemens, Deka or Bendix - External leak were plastic meets the metal body.

Late 80's Jeep 4.0

Look for fuel leaking from where the top plastic meets the metal body.

Mitsubishi - External leak were plastic meets the metal body.

Late 80's Turbo 2.6 Starion, Conquest, etc

Look for fuel leaking from where the top plastic meets the metal body. A very common problem.

Denso - Coil windings will increase in resistance.

90's Toyota (various top colors)

Denso problem injector

Verify the resistance is within 10% of each other. Normally 12-14 ohms.