Symptom/Test Menu
WARNING: This page is about a different car, the 1989 Mercury Topaz, 1989 Ford Tempo, and 1989 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSIS BY SYMPTOM (SYMPTOM-TO-CIRCUIT TEST MENU)
| Symptom | Go To: Circuit Test No. (Step No.) |
|---|---|
| Runs Rough, Misses, Stalls, Lacks Power, Rough Idle, Surges | D19 (2) |
| Stalls At Idle Or During Self-Test | D19 (1) |
| Stalls When Parking (OHC EFI only) | B15 (3) |
| Surges With A/C On At Idle (OHC EFI & HSC EFI only) | B7 (16) |
| A/C Stays On During WOT | D7 (11) |
| A/C Not Functioning | D7 (11) |
| A/C Compressor Always Runs (OHC EFI only) | D7 (1) |
| High Idle Speed After Restart. May Have Spark Knock For 3-5 Minutes After Restart (Turbo EFI only) | B7 (1) |
| Low Idle With A/C On | B13 (10) |
| High Idle In "Drive" A/T Trans Only | N/A |
| Shift Indicator Light Always/Never On (HSC EFI only) | D6 (1) |
| "CHECK ENGINE" Light Always On | D11 (1) |
| "CHECK ENGINE" Light Never On | D11 (2) |
| "CHECK ENGINE" Light On Intermittently | D11 (5) |
| "CHECK ENGINE" Light Flashes With Erratic Idle | D11 (6) |
| No Cruise Control And Stalls On Decel. | N/A |
| Stumble After Hot Restart | C1 (19) |
| Engine Will Not Restart | N/A |
| Fuel Pump Runs With Engine Off (OHC EFI & Turbo EFI only) | C2 (14) |
| Gasoline Fumes In Engine Compartment (Turbo EFI & HSC EFI only) | D4 (1) |
| Detonation/Spark Knock (OHC EFI) | B7 (1) |
| Detonation/Spark Knock (Turbo EFI) | B7 (2) |
| Engine Cooling Fan(s) Inoperative | N/A |
| Cooling Fan(s) Always On | N/A |