Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Injector Spray Pattern
Connect jumper wire between ME-SFI control module connector "A" terminal No. 3 and ME-SFI control module connector "C" terminal No. 29 (socket box terminals No. 3 and 21). Turn ignition on. Hold fuel injectors one at a time in a container. Briefly actuate injector using a shop-made test wiring harness between socket box terminals No. 3 (-) and 2 (+). Observe fuel injector spray pattern. See Fig 1. If fuel injector spray pattern is okay, test is complete. If fuel injector spray pattern is not okay, possible cause is faulty fuel injector. Repair or replace as necessary.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.