[edieedie]

P0603 code its still running

should i be looking for a pcm

have intermitting start problem

when it wont start the cel is on and no wait to start light keep pllaying with key and the cel will go out and the wait to start light will come on then it will start

 

[klhansen]

P0603 is from your chip (normal). Try pulling the chip for diagnosis (make sure power is cut to the PCM beforehand). Take that out of the equation and see what happens.

If you're having starting problems, it could be related to lots of things. There's more than one power feed to the PCM, but I'd be suspecting chip or it's connection to the PCM.

 

[edieedie]

dont have the chip sent it off to get a reburn and disconnected the battier cables for 30 min. before the codes were read

 

[edieedie]

help here boys have a intermittent start problem

 

[edieedie]

need a little help here

why do i have an intermitent start problem

dont have a chip sent it off for a reburn on the 6th, not back yet unhook battiers for at least 30 min before scan codes with a 3000.00 snapon scanner and got this code P06003 so is the pcm causing the problem or should i look else where

and where should i look???????

 

[bugman]

When you disconnected your batteries you cleared any stored codes in the computer. The P0603 is the PCM keep alive memory witch means that the batteries have been disconnected. You may want to try and unplug your fuel heater in the filter bowl. It may be drawing enough power or almost shorting out so that the PCM will not see any or enough voltage.

Jim

 

[edieedie]

thank you, will give it a try

 

[edieedie]

tryed it and not the pronlem

 

[STurbo90]

you might just open up the pcm and take a look. Its not uncommon to find water corrosion.

 

[1997 FORDF350PS]

My rig had these identical symptoms and after I changed the electrical ignition switch
the symptoms seem to be gone. I don't see much mention of this cure, but it worked
for me. Now the problem is losing 10 qts oil in 7 miles. It's in a shop for pedestal o rings
and oil galley plugs. There is blow by so that may be my next $$$ job.