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FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
no one?
The WTS ligh is ok, the temperature here in my Country about 15 degree Celsius = 59 degree Fahrenheit.
Could be de GPR?
Am I done or I am wrong?
PLEASE help me.
thanks for any input.
The WTS ligh is ok, the temperature here in my Country about 15 degree Celsius = 59 degree Fahrenheit.
Could be de GPR?
Am I done or I am wrong?
PLEASE help me.
thanks for any input.
Posting Guru
Joined: Nov 2006
Posts: 1,059
Likes: 0
From: Herndon KY
A good indication of a bad CPS is no Tach movement during crank. you should see 200rpm or so. However i would vote for gpr, cause white smoke indicates uburned fuel, which means your injectors are working with no ignite. you can also check the outlet voltage with a test light or voltmeter, two large posts, when you turn the key on and are waiting to start the voltage should be the same on both posts if not it is bad.
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FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
UPDATE: Well, the truck this morning started very fine and its working normally. I began checking the GPR as you told me and no voltaje in the second big terminal with the key on. But also not voltaje in the small terminal coming from the key on,?? so I wondered what happened, and I found that one wire of the Switch that I use to desactivate the Glow plugs, was losen, I reconected it and solved the problem. So that was the history.
I just wonder why there were not a tach movement???? like when the failure of the CPS, maybe the Gurus knows.
Thanks to all of you.
I just wonder why there were not a tach movement???? like when the failure of the CPS, maybe the Gurus knows.
Thanks to all of you.
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Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
there was no voltage on the small wire becuase it supplies a ground to control the Glowplugs. No tach movement its hard to say. It starting to no be the proven way to diagnos no start and cps problems. With a bad cps you will not get tach movement but some have found that they get no tach movement while cranking even with a good cps. I guess if its up and running and you found you issue with the loose wire just take note of the tach and see if it moves when you crank. The next colder morning you have have jsut start cranking right away before the glow plugs can heat and see if the tach moves. chances are it doesn't.
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Thread Starter
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FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
nojeffgordon, I also checked the fuses 9, 22, 30 (etc) before everything, no one wast blow out, and the internal heater is inplugged in my truck. I also checked the oil level and the oil in the HPOP.
unless to this morning, the GPR and de CPS were ok. anyway I just ordered a new GPR (I have a spare CPS)
thanks for your notes.
unless to this morning, the GPR and de CPS were ok. anyway I just ordered a new GPR (I have a spare CPS)
thanks for your notes.
Senior User
Joined: Nov 2006
Posts: 204
Likes: 3
you may have a loose connection or a faulty oil temp sensor. I recently has this problem. The pcm uses oil temp and the baro sensor to determine the on time of the GPR. my GPR was intermitant in operation. I unpluged the oil temp sensor, and the GPR latched. come to find out it just wasn't plugged in all the way.
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FOREIGN GURU
Joined: Jul 2006
Posts: 7,655
Likes: 7
From: Celaya, Gto. MX
Bustech81, thanks for your input.
Tjbeggs: I found this in the internet:
One sign of a failed CPS is your Tach will not move while cranking the engine over.
This is on long extended cranking. Short cranking, on a good CPS will not register either. If you have an AIC (APCM) installed, it may not registered RPM's either. The Tach gets its reference from the CPS sensor and if its not sending a signal, no tach.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o
></o>
ANOTHER UPDATE!
Those of you with a 2002 or newer truck, the "No TACH Movement During Cranking" troubleshooting trick probably wont work for you. Ford changed how the TACH gets its signal to a computer controller and so it does not move AT ALL until the truck is fully running. However, if the truck was running and the TACH falls to zero, start looking into the CPS.
<o></o>
Tjbeggs: I found this in the internet:
One sign of a failed CPS is your Tach will not move while cranking the engine over.
This is on long extended cranking. Short cranking, on a good CPS will not register either. If you have an AIC (APCM) installed, it may not registered RPM's either. The Tach gets its reference from the CPS sensor and if its not sending a signal, no tach.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o></o>ANOTHER UPDATE!
Those of you with a 2002 or newer truck, the "No TACH Movement During Cranking" troubleshooting trick probably wont work for you. Ford changed how the TACH gets its signal to a computer controller and so it does not move AT ALL until the truck is fully running. However, if the truck was running and the TACH falls to zero, start looking into the CPS.
<o></o>