94 351 no start problem
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Cross-Country
Joined: Apr 2002
Posts: 71
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From: Houston USA
94 351 no start problem
My 94 F150 just decided to not start today. I checked the repair manual. Plugged a voltmeter into the tach lead at the coil. Whe I turn the motor over I see a steady 12volts, and according to the manual it should be a pulsating reading from 0 to 12 volts indicating the coil is firing. I put an ohmeter on the coil and it tests good. Next I performed an ohmeter test from the connector on the ignition module and it read less than 5 ohms. So, I pulled the ignition module and took it to Auto Zone. They tested it and the first test it showed to be good. I asked them to retest it and this time it failed. Saw it with my own eyes. So, I replaced the ignition module and it still won't start... I know it is not a fuel problem as I can smell gas and I can hear the pump when I turn the key to start... Suggestions ???
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
You have a bad Hall Effect Stator Assembly sensor in your distributor.
Hall Effect Stator Assembly AKA (CMP sensor) - Camshaft Position AKA PIP sensor AKA pickup coil.
Number 4 in the bottom diagram.
Diagrams:
http://i54.photobucket.com/albums/g9...HallEffect.gif
http://i54.photobucket.com/albums/g9...ion/Image2.gif
Hall Effect Stator Assembly AKA (CMP sensor) - Camshaft Position AKA PIP sensor AKA pickup coil.
Number 4 in the bottom diagram.
Diagrams:
http://i54.photobucket.com/albums/g9...HallEffect.gif
http://i54.photobucket.com/albums/g9...ion/Image2.gif
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Post Fiend
Joined: Sep 2006
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From: Island Southeast Alaska
I am still thinking it is still flooded and the plugs are to wet to fire. And the more ya try the wetter they get. See if ya got fire at the coil wire and or the plug wires before throwing more parts at It. At least I would.
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From: Easton,Ks
Originally Posted by Scndsin
Came back & looked at it for the 3rd time... Yeah, feel like idiot
Here is the key to that diagram.
http://i54.photobucket.com/albums/g91/subford/Electrical/Ignition/Image2A.gif
Hall Effect Stator Assembly AKA (CMP sensor) - Camshaft Position AKA PIP sensor AKA pickup coil.
Last edited by subford; Jan 25, 2007 at 12:02 PM.
Fleet Owner
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From: Easton,Ks
Originally Posted by Domino
Thanks for the replies. I will check the distributor tomorrow. Question, if the Hall Effect pick up is defective is it replacable ?
Originally Posted by Domino
or do I need to but a new distributor ??
And do not forget to take out the SPOUT jumper while timing the engine.