Mechanics

TRUCK WILL NOT RUN NO SPARK

1995 Ford F-150 • 109,000 miles

Ran fine stopped on day, no Spark, replaced coil, replaced pick-up coil, replaced ignition module, replaced computer, voltages check good, wires check good, grounds check good, fuses and relays check good, removed spout or computer conection get spark and truck will start and run for a few seconds and fuel pump runs none stop can you give me where to check next Thanks
Avatar
Ranger101
May 21, 2012.



What liter engine is this?


Rasmataz
May 21, 2012.
A 5.0 EFI


Tiny
Ranger101
May 21, 2012.
Fig. 5: Distributor Ignition System Wiring Diagram (5.0L)
PINPOINT TEST AA: NO START
Check For Codes Perform QUICK TEST. See TESTS W/CODES - EEC-IV (5.0L) article. If diagnostic trouble codes are present, service codes as necessary. If codes are not present, go to next step.
Check Battery Turn ignition on. Check battery voltage. If battery voltage is less than 12 volts, service battery as necessary. If battery voltage is more than 12 volts, go to next step.
Check For Spark Using Neon Bulb Spark Tester (D89P-6666-A), check for spark at coil wire while cranking. If spark is not present, go to next step. If spark is present, go to step 9).
Check For ICM Power Turn ignition off. Connect EEC-IV Diagnostic Cable (007-00097) to EEC-IV Breakout Box (T83L-50-EECIV), negative battery terminal and ICM. See Fig. 6. Ensure PIP OPEN/NORMAL/SPOUT OPEN switch is in NORMAL position. Put DI overlay on breakout box.
WARNING: DO NOT connect EEC-IV Diagnostic Cable and PCM to EEC-IV Breakout Box simultaneously.

Turn ignition on. Put DVOM on DC voltage scale. Measure voltage between J5 (ICM PWR) and J7 (B -) at breakout box. If voltage is 10 volts or less, repair open in ICM PWR circuit to ICM. See Fig. 5. If voltage is more than 10 volts, go to next step.
Fig. 6: Connecting EEC-IV Diagnostic Cable
Check PIP Signal Put DVOM on AC voltage scale. Measure voltage between J7 (B -) and J15 (PIP) while cranking engine. If AC voltage is not 3.0-8.5 volts, go to step 11). If AC voltage is 3.0-8.5 volts, go to next step.
Check SPOUT Signal Measure voltage between J7 (B -) and J10 (SPOUT) while cranking engine. If AC voltage is not 3.0-8.5 volts, go to step 18). If AC voltage is 3.0-8.5 volts, go to next step.
Check COIL PWR At Coil Turn ignition off. Connect diagnostic cable to ignition coil wiring harness connector. Leave ignition coil disconnected. Put DVOM on DC voltage scale. Turn ignition on. Measure voltage between J2 (COIL PWR) and J7 (B -). If voltage is 10 volts or less, repair open in ignition coil circuit. If voltage is more than 10 volts, go to next step.
Check COIL- Signal Turn ignition off. Connect B+ lead of diagnostic cable to positive battery terminal. Connect test light between J1 (B +) and J3 (COIL-). Crank engine. If test light does not flash brightly, go to step 27). If test light flashes brightly, replace ignition coil.
Check For Spark Using Neon Bulb Spark Tester (D89P-6666-A), check for spark at each spark plug wire while cranking. If spark is consistent at all spark plug wires, go to next step. If spark is not consistent, service distributor cap, rotor, plugs or plug wires.
Check Spark Plugs Remove and inspect spark plugs. Replace plugs as necessary. If spark plugs are okay, no-start condition is not ignition related. See appropriate H - TROUBLE SHOOTING (EEC-IV) - NO CODES article.
TESTS W/O CODES - EEC-IV (for Bronco)
TESTS W/O CODES - EEC-IV (for "E" Series RWD Van)
TESTS W/O CODES - EEC-IV (for "F" Pickup)
Check For CMP Power At CMP Sensor Connect diagnostic cable CMP (PIP) sensor tee to CMP sensor and wiring harness connector. Set DVOM to DC voltage scale. Measure voltage between J7 (B -) and J22 (CMP PWR) at breakout box. If voltage is 10 volts or less, repair open PIP PWR circuit. If voltage is more than 10 volts, go to next step.
Check For PIP From CMP Sensor Turn diagnostic cable switch to PIP OPEN position. Set DVOM to AC voltage scale. Crank engine and measure voltage between J7 (B -) and J34 (PIP A). If AC voltage is not 3.0-8.5 volts, check CMP sensor wiring and connector. Repair as necessary. If wiring and connector are okay, replace CMP sensor. If AC voltage is 3.0-8.5 volts, go to next step.
Check PIP With ICM Disconnected Turn ignition off. Turn diagnostic cable switch to NORMAL position. Disconnect diagnostic cable from ICM. Leave diagnostic cable attached to ICM wiring harness connector. Crank engine and measure voltage between J7 (B -) and J34 (PIP A). If AC voltage is 3.0-8.5 volts, replace ICM. If AC voltage is not 3.0-8.5 volts, go to next step.
Check PIP With PCM Disconnected Disconnect PCM. Crank engine and measure voltage between J34 (PIP A) and J7 (B -). If AC voltage is 3.0-8.5 volts, replace PCM. If AC voltage is not 3.0-8.5 volts, go to next step.
Check PIP To PCM For Short To Power Turn ignition off. Disconnect diagnostic cable from CMP sensor. Leave diagnostic cable attached to CMP sensor wiring harness connector. Set DVOM on DC voltage scale. Turn ignition on. Measure voltage between J7 (B -) and J34 (PIP A). If voltage is 0.5 volt or more, repair short to power in PIP/PIP A circuit between CMP sensor and PCM or ICM. If voltage is less than 0.5 volt, repair short to ground in PIP/PIP A circuit between CMP sensor and PCM or ICM.
NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 15) to step 18). No test procedures have been omitted.

18) Check For SPOUT In Harness If engine starts in this step, continue testing. Turn diagnost


Rasmataz
May 21, 2012.
I have done all these steps, no signal from PIP with spout conected, pull spout and you have signal and engine starts, have replaced ICM and eec or Pcm 3 times no effect, connect spout you have no spark and fuel pump runs without timing out it also runs with spout in? All voltages are correct and have Ohmed to check for wire breaks all check good conections.


Tiny
Ranger101
May 21, 2012.
This is all I got for you-sorry


Rasmataz
May 21, 2012.
Thanks I will keep looking


Tiny
Ranger101
May 22, 2012.