Crankshaft Sensor
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Crankshaft Sensor
Hey everyone I have a problem my 85 f250 351w will crank but won’t fire I have been told if the crankshaft sensor is out that it won’t? I guess my question is if this is true and a possible location?
FTE Legend
Joined: Nov 2015
Posts: 30,945
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From: Angier, NC
I don't know everything but I don't think it has a crank sensor.
I take it you don't have spark and why it was thought crank sensor.
I hope the person that told you that does not fix cars for a living.
Dose your dist. have vacuum line to it or just wires going into a small box?
Maybe post up a picture of your dist. so we can see what you got.
As a guess if you have that small box with wires going into it known as a TFI module could be bad.
Or if you have a vacuum line to the dist. the IGN. module on the inner fender is bad.
Dave ----
I take it you don't have spark and why it was thought crank sensor.
I hope the person that told you that does not fix cars for a living.
Dose your dist. have vacuum line to it or just wires going into a small box?
Maybe post up a picture of your dist. so we can see what you got.
As a guess if you have that small box with wires going into it known as a TFI module could be bad.
Or if you have a vacuum line to the dist. the IGN. module on the inner fender is bad.
Dave ----
FTE Legend
Joined: Nov 2015
Posts: 30,945
Likes: 4,126
From: Angier, NC
You are right that box off the side with the wires going to it is the TFI (thin film ign) They are cheap enough I would replace it and if that is not it you have a spare in the glove box.
The only other thing I can think it could be is the pick up coil, think its called PIP forget what it stands for, inside the dist.
Dave ----
The only other thing I can think it could be is the pick up coil, think its called PIP forget what it stands for, inside the dist.
Dave ----
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Joined: Nov 2007
Posts: 22,415
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From: Denver Metro Area, CO
Dave,
These OBD-1 systems use the PIP signal as a crank position sensor and yes, its failure gives you a no-start.
But it will alert you ahead of time by throwing a code for it BUT you need to pull the codes, we don't have a CEL/MIL.
So, OP... pull your codes to figure out what the computer has to say about things, it's the first step in diagnosing any computer-controlled engine.
These OBD-1 systems use the PIP signal as a crank position sensor and yes, its failure gives you a no-start.
But it will alert you ahead of time by throwing a code for it BUT you need to pull the codes, we don't have a CEL/MIL.
So, OP... pull your codes to figure out what the computer has to say about things, it's the first step in diagnosing any computer-controlled engine.
FTE Legend
Joined: Nov 2015
Posts: 30,945
Likes: 4,126
From: Angier, NC
Dave,
These OBD-1 systems use the PIP signal as a crank position sensor and yes, its failure gives you a no-start.
But it will alert you ahead of time by throwing a code for it BUT you need to pull the codes, we don't have a CEL/MIL.
So, OP... pull your codes to figure out what the computer has to say about things, it's the first step in diagnosing any computer-controlled engine.
These OBD-1 systems use the PIP signal as a crank position sensor and yes, its failure gives you a no-start.
But it will alert you ahead of time by throwing a code for it BUT you need to pull the codes, we don't have a CEL/MIL.
So, OP... pull your codes to figure out what the computer has to say about things, it's the first step in diagnosing any computer-controlled engine.
I don't want to send him down the wrong rabbit hole LOL
Dave ----
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Joined: Feb 2008
Posts: 5,831
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From: St Albert, Alberta
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