HELP!!! PSD WONT START

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Dec 29, 2009 | 09:25 PM

#46

tdpower

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Quote:

Originally Posted by PaysonPSD

When a scantool cannot estalish a connection it means the PCM is not getting power.

Upper left corner of this Power Distrbution diagram is the path to supply power to the PCM. With key on or in start power goes through under dash fuse #30 to the PCM Relay Diode to the PCM Relay winding to ground. If you can't feel the PCM relay operate it has to be a problem along that path.

It could also be a blown fuse that will not allow for the connection. IIRC it is the the power point/cig. Also, an incompatible program may cause this.

Dec 29, 2009 | 09:38 PM

#47

PaysonPSD

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From: Payson, AZ

Quote:

Originally Posted by tdpower

It could also be a blown fuse that will not allow for the connection. IIRC it is the the power point/cig. Also, an incompatible program may cause this.

The scantool not finding the OBDII port (blown cig lighter fuse) and not being able to connect are two different things. Is it not finding the port or not connecting to the PCM????

Sometimes I get so frustrated not being able to be right there to help. GRRRRRR.

Dec 29, 2009 | 10:02 PM

#48

dthompson

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using a grey cps....i know how you feel....i wish someone was here to help.....i think it was unable to connect but i'll try tomorrow and check the cig lighter fuse...

Dec 29, 2009 | 10:11 PM

#49

medhvac

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From: house springs,mo

Quote:

Originally Posted by dthompson

using a grey cps....i know how you feel....i wish someone was here to help.....i think it was unable to connect but i'll try tomorrow and check the cig lighter fuse...

thats the same color one i put in after my black on went bad,grab the spare one

in your glove box and put in and see if it works!

Dec 29, 2009 | 10:13 PM

#50

dthompson

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saying grey is bad....????

Dec 29, 2009 | 10:16 PM

#51

medhvac

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From: house springs,mo

i didnt say that i said grab that spare in your glove box and put it in!

Dec 29, 2009 | 10:17 PM

#52

dthompson

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don't have a spare...lol this one is brand spanking new!

Dec 29, 2009 | 10:20 PM

#53

tdpower

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Check the voltage on the fuel pump. Color does not matter if it is an aftermarket. Just my .04 cents adjusted for inflation.

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Dec 29, 2009 | 10:24 PM

#54

medhvac

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From: house springs,mo

Quote:

Originally Posted by dthompson

don't have a spare...lol this one is brand spanking new!

sorry but anyone that owns a 7.3 has a spare cps in there glove box! new or not!sorry man id go get another one and try it what ya got to lose?

/

Dec 29, 2009 | 10:27 PM

#55

dthompson

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i know but i think its bull if a brand new part doesn't work....may try it but that shouldn't make the wts light come on should it....

Dec 29, 2009 | 10:32 PM

#56

dthompson

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i'll check the fuel pump tomorrow...but the cps is not aftermarket...it is FORD...

Dec 29, 2009 | 10:39 PM

#57

tdpower

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What does a cps have to do with a wts light?

Dec 29, 2009 | 10:41 PM

#58

dthompson

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NOTHING THAT I KNOW OF!!!! that is what i'm saying i have no wts light that is y i don't think the cps is bad....

Dec 29, 2009 | 10:47 PM

#59

tdpower

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That is why I was trying to get you to check the voltage at the fuel pump. My other thought is your not building enough hpop pressure to fire the injectors. Are you getting any codes?