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Old 07-26-2006, 10:00   #1 (permalink)
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confused Engine Cranks But Won´t Ignites

1994 F-150, Efi,5.0 Engine. Actually The Engine Cranks But Won´t Ignites, There Is Computer Signal To The Fuel Injectors (recently Serviced), Plugs Spark (new Plugs), Cilynders Compresion 90 Psi Avg., Top Dead Center And Timing Confirmed.
I Will Follow Any Recommendation In Order To Get This Engine Running.
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Old 07-26-2006, 20:10   #2 (permalink)
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Re: Engine Cranks But Won´t Ignites

Quote:
Originally Posted by EL LLANERO
1994 F-150, Efi,5.0 Engine. Actually The Engine Cranks But Won´t Ignites, There Is Computer Signal To The Fuel Injectors (recently Serviced), Plugs Spark (new Plugs), Cilynders Compresion 90 Psi Avg., Top Dead Center And Timing Confirmed.
I Will Follow Any Recommendation In Order To Get This Engine Running.
Pull the coil lead and check for spark
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Old 07-27-2006, 05:11   #3 (permalink)
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Re: Engine Cranks But Won´t Ignites

CORRECT "atec77" THE SPARK IN ALL PLUGS IS CONFIRMED SUBSEQUENTLY THE CABLES ARE OK. I HAVE MORE MORE DATA TO INFORM.
DURING THE TROUBLESHOOTING, IN ORDER TO SIMPLIFY THE PROCESS, I HAVE REPLACED THE FOLLOWING PARTS:
- DISTRIBUTOR INTERNAL HALL EFFECT SENSOR (PIP SENSOR)
- REMOTE IGNITION CONTROL MODULE (ICM)
- PLUGS AND THEIR CABLES
AND THE PROBLEM CONTINUES...
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Old 07-27-2006, 20:00   #4 (permalink)
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Re: Engine Cranks But Won´t Ignites

You must have these three things for an engine to run...........................

Spark (You say you have it)

Fuel (I would get a pressure tester and check that next)

Compression (A compression tester will check that)
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Old 07-28-2006, 12:03   #5 (permalink)
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Re: Engine Cranks But Won´t Ignites

Engine Cyl. Compression Check Results: Cyl#1(70), #2(85), #3(80), #4 (60), #5(70), #6(90), #7(90), #8(60)
Fuel Pump Press 36 Psi At Fuel Injectors Rail.
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Old 07-28-2006, 16:01   #6 (permalink)
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Re: Engine Cranks But Won´t Ignites

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Originally Posted by EL LLANERO
Engine Cyl. Compression Check Results: Cyl#1(70), #2(85), #3(80), #4 (60), #5(70), #6(90), #7(90), #8(60)
Fuel Pump Press 36 Psi At Fuel Injectors Rail.
Compression would be 170 or so ?
other wise the figures are low
now is the spark occouring at the right time ? and do the injectors actually aork ?
should be possible to hear them ticking and maybe smell fuel when you turn the key ( some models will spin the electric fans to show all is well)
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Old 07-28-2006, 20:30   #7 (permalink)
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Re: Engine Cranks But Won´t Ignites

Compression is slightly low, but not enough to not make it run. There is an ignition module located on the left inner fender that is known to fail causing a no-start.
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Old 08-01-2006, 07:24   #8 (permalink)
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Re: Engine Cranks But Won´t Ignites

Engine T.D.C was adjusted following "HAYNES" applicable repair manual confirming the correct spark time.
fuel injectors, connected to car harness, were tested out of the cylinders and all are spraying fuel.
the remote ignition module (inst. on the left fender) was replaced. I have checked the wiring to the ignition module for continuity found ok, but I would like to know which are the signals I should see at each pin of the connector (6 pins).
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Old 01-25-2007, 22:49   #9 (permalink)
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Re: Engine Cranks But Won´t Ignites

i think mullet man has it with the module. you can have voltage everywhere you should and it still wont start. is the module grounded well? sure the coil is good? (ive had problems with ford coils) is this grounded(tight) is the condenser (if exists) coroded, bad connection? good luck
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