LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 1998 >> Econoline Custom >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Engine Controls - Basic Engine Testing - 5.4L) >> No-Start Diagnosis >> DISTRIBUTORLESS Ignition System >> Spark Check

Spark Check

WARNING: This page is about a different car, the 1998 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform self diagnostic QUICK TEST to check for ignition-related fault codes, and repair as necessary. See QUICK TEST in appropriate article:

    For gasoline vehicles, see TESTS W/CODES - 5.4L GASOLINE .

    For CNG vehicles, see TESTS W/CODES - 5.4L CNG .

    If no fault codes are retrieved, check ignition system wiring harness connectors for corrosion and tight fit. See appropriate article:

    For gasoline vehicles, see WIRING DIAGRAMS - 5.4L GASOLINE .

    For CNG vehicles, see WIRING DIAGRAMS - 5.4L CNG .

    Clean or repair connectors as necessary.

  2. If wiring and connectors are okay, use Neon Bulb Spark Tester (D8IP-6666-A) to check for spark at each spark plug wire while cranking engine. If spark is strong and consistent at each spark plug (one spark per crankshaft revolution), ignition system is okay. If spark is not present, go to CIRCUIT TEST JD in appropriate article:

    For gasoline vehicles, see TESTS W/CODES - 5.4L GASOLINE .

    For CNG vehicles, see TESTS W/CODES - 5.4L CNG .

scientia non olet · About LEMON Manuals