Help Po1607 ???
Thread Starter
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Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
Help Po1607 ???
got in a 99 SD no start. cranks okay, will start intermittently.
pulled a PO1607 and a PO603.
but the batteries were removed for charging so i was not concerned w/ the PO603 KAM memory failure.
this truck just had a pcm reflash and looks like bone yard crayon on the pcm too.
i also notice that the GEM/fuse box have been tacken out.
only has 67K on it.
go it to start and run fine 2X for 15 minutes while trying KOEO tests and wiggles tests for the IDM and PCM harnesses. no luck.
i had to pass this one as i do not have a break out for this model and was wondering if there may be a TSB or a noitce i could not find for this. we sent it to the dealer down the road. but i am always looking to figure out new problems for the next time.
i am assuming that there is either a bad PCM or an IDM, also wondering if this is an on going issue as i stated before it looks like yellow crayon on the pcm case.
any help is appriciated guys. thanks alot.
yes i rest the mil and the PO1607 is a KOEO and also contiuous memry code. will set every time the truck does not start, after 10 seconds of cranking. also has a new glow plug soleniod.
pulled a PO1607 and a PO603.
but the batteries were removed for charging so i was not concerned w/ the PO603 KAM memory failure.
this truck just had a pcm reflash and looks like bone yard crayon on the pcm too.
i also notice that the GEM/fuse box have been tacken out.
only has 67K on it.
go it to start and run fine 2X for 15 minutes while trying KOEO tests and wiggles tests for the IDM and PCM harnesses. no luck.
i had to pass this one as i do not have a break out for this model and was wondering if there may be a TSB or a noitce i could not find for this. we sent it to the dealer down the road. but i am always looking to figure out new problems for the next time.
i am assuming that there is either a bad PCM or an IDM, also wondering if this is an on going issue as i stated before it looks like yellow crayon on the pcm case.
any help is appriciated guys. thanks alot.
yes i rest the mil and the PO1607 is a KOEO and also contiuous memry code. will set every time the truck does not start, after 10 seconds of cranking. also has a new glow plug soleniod.
Elder User
Joined: Nov 2004
Posts: 798
Likes: 0
Originally Posted by 18vtx00
got in a 99 SD no start. cranks okay, will start intermittently.
pulled a PO1607 and a PO603.
but the batteries were removed for charging so i was not concerned w/ the PO603 KAM memory failure.
this truck just had a pcm reflash and looks like bone yard crayon on the pcm too.
i also notice that the GEM/fuse box have been tacken out.
only has 67K on it.
go it to start and run fine 2X for 15 minutes while trying KOEO tests and wiggles tests for the IDM and PCM harnesses. no luck.
i had to pass this one as i do not have a break out for this model and was wondering if there may be a TSB or a noitce i could not find for this. we sent it to the dealer down the road. but i am always looking to figure out new problems for the next time.
i am assuming that there is either a bad PCM or an IDM, also wondering if this is an on going issue as i stated before it looks like yellow crayon on the pcm case.
any help is appriciated guys. thanks alot.
yes i rest the mil and the PO1607 is a KOEO and also contiuous memry code. will set every time the truck does not start, after 10 seconds of cranking. also has a new glow plug soleniod.
pulled a PO1607 and a PO603.
but the batteries were removed for charging so i was not concerned w/ the PO603 KAM memory failure.
this truck just had a pcm reflash and looks like bone yard crayon on the pcm too.
i also notice that the GEM/fuse box have been tacken out.
only has 67K on it.
go it to start and run fine 2X for 15 minutes while trying KOEO tests and wiggles tests for the IDM and PCM harnesses. no luck.
i had to pass this one as i do not have a break out for this model and was wondering if there may be a TSB or a noitce i could not find for this. we sent it to the dealer down the road. but i am always looking to figure out new problems for the next time.
i am assuming that there is either a bad PCM or an IDM, also wondering if this is an on going issue as i stated before it looks like yellow crayon on the pcm case.
any help is appriciated guys. thanks alot.
yes i rest the mil and the PO1607 is a KOEO and also contiuous memry code. will set every time the truck does not start, after 10 seconds of cranking. also has a new glow plug soleniod.
Thread Starter
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Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
Originally Posted by touchofgrey
Did the truck run ok after the reflash? If so, how long before the problem showed up? I assume that the HPOP reservour has been checked, and is full. On the surface.....it looks like a bad PCM, but because it seems to be intermittent.....I'd start with the PCM relay, and the PCM diode. It may be a heat related problem with any of the three. A remove and reseat of both the relay and diode at least. Do you have anymore info?
Elder User
Joined: Nov 2004
Posts: 798
Likes: 0
Originally Posted by 18vtx00
has a new IDM relay, and i swaped out the other relays w/ others of the same part#. it ran okay for a few days, but this is one i was working on for a used car dealer. they had the dealer they bought it from do the flash. we also put a crank sensor in it a few weeks ago for an intermittent no start. they just told us to put one in we never did any diagnosing for this before on this truck.and i belive this is the same intermittent problem. looks to me like someone has been chasing this issue as i still think the pcm is used.
Elder User
Joined: Nov 2004
Posts: 798
Likes: 0
Originally Posted by 18vtx00
what exactly does this HPOP res do?? hold oil for the injectors?
i am an L1 but new @ diesels. thanks man!
i am an L1 but new @ diesels. thanks man!
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Thread Starter
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Fleet Mechanic
Joined: Nov 2004
Posts: 1,427
Likes: 10
From: Templeton, Massachussetts
Originally Posted by touchofgrey
The injectors are triggered electronically from the PCM through the injector driver modual. But the injector is actuated by hydralics from the High Pressure Oil Pump.....no oil in the reservoir......no fuel in the chamber. Sometimes the valve in the bottom of the reservoir leaks all of the oil back down into the crankcase. Engine won't start, and PCM usually has codes to reflect the condition.
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Elder User
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Originally Posted by 18vtx00
okay, if the truck is still there then i will see how to check the level, if this were the issue then wouldn't extended cranking make her fire?
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