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 2000 DT466E no start
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krmvcs
Advanced Member

362 Posts

Posted - 04/18/2016 :  07:52:16 AM  Show Profile  Reply with Quote
cranks but keeps cutting out. for a few months its been a recurring problem that ive repaired several times from loose connections, relays, worn out relay block terminals, wiring rubbed through where all the spaghetti is above the starter. after weeks of trouble free running, it happened again. this time its different. cranks fast and the starter "cuts out" once a second or so until it grinds on the flex plate. i unplugged the cam sensor so i can test circuits without the engine starting on me and it cranks normal.
Question: though it sounds like a cam sensor, how can i test the signal without the software? or is there something else im missing or should do first?

krmvcs
Advanced Member

362 Posts

Posted - 04/18/2016 :  11:04:59 AM  Show Profile  Reply with Quote
update: my generic code reader says 128 254 8 witch translates to "unexpected reset fault". i managed to get it started with a quick shot of ether and now i cant duplicate the problem. dont think its a cam sensor issue. ive got more wire gremlins to hunt down.

-Ken-
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JoeHEB1
Advanced Member

498 Posts

Posted - 04/18/2016 :  12:40:12 PM  Show Profile  Visit JoeHEB1's Homepage  Reply with Quote
Have you checked the wires on the IPR valve connector? Or try changing out the IPR valve with a known good one. Try the ICP sensor to.
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krmvcs
Advanced Member

362 Posts

Posted - 04/18/2016 :  1:50:36 PM  Show Profile  Reply with Quote
wiring ok and its the only dt ive got. found one of the relays in the rear run box was a little weak. this still doesnt explain why it would crank fine when i pulled the plug on the cam sensor. this one doesnt have the usual drivability issues with icp/ipr or even ecm power loss. ill see if its gone when i get to work tomorrow.

-Ken-
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eddo
Advanced Member

USA
311 Posts

Posted - 04/19/2016 :  09:39:30 AM  Show Profile  Reply with Quote
unless I'm missing something, I don't think your codes are correct.

The 2000 generation IC's that I have flash codes in 3 number sequences only: 111, 222, 143, etc



I'd start by repulling the codes, clearing them, and then running it and see what comes back.
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RonF
Top Member

867 Posts

Posted - 04/19/2016 :  10:33:46 AM  Show Profile  Reply with Quote
That layout looks like SPN FMI coding.

US Army retired CMBT
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Airdirect
Active Member

15 Posts

Posted - 04/22/2016 :  10:06:59 PM  Show Profile  Visit Airdirect's Homepage  Reply with Quote
Have you checked the accessory power wires connected to the battery terminals. I was having an intermittent problem and found these connections were bad causing a ECM reset.
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krmvcs
Advanced Member

362 Posts

Posted - 05/13/2016 :  1:40:40 PM  Show Profile  Reply with Quote
update: replaced a couple suspect cables and wiring at the starter, and installed a booster relay on the starter. cranks hard and battery voltage doesnt drop as low as it had before. it has started every morning since.

-Ken-
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n2682
Active Member

41 Posts

Posted - 05/25/2016 :  04:11:01 AM  Show Profile  Visit n2682's Homepage  Reply with Quote
can i ask what a booster relay for the starter is?
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darpen5
Active Member

USA
16 Posts

Posted - 05/25/2016 :  04:47:28 AM  Show Profile  Reply with Quote
Yes that is a a new one on me too

Darrell R Holland
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krmvcs
Advanced Member

362 Posts

Posted - 05/25/2016 :  05:52:41 AM  Show Profile  Reply with Quote
http://www.delcoremy.com/Documents/Starter-Instruction-Sheets/39MT-38MT-installation-instructions_10511649

it was explained to me that this is something that comes standard on most new starters. basically youre adding a smaller solenoid between your starter relay, and the starter motor solenoid. i noticed a marked improvement.


-Ken-

Edited by - krmvcs on 05/25/2016 05:56:28 AM
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tigger2
Advanced Member

USA
469 Posts

Posted - 05/25/2016 :  06:06:46 AM  Show Profile  Click to see tigger2's MSN Messenger address  Reply with Quote
It is also called a soft start solenoid and improves the life of the starter. Your local starter and alternator rebuilder will have them.
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krmvcs
Advanced Member

362 Posts

Posted - 05/25/2016 :  06:10:24 AM  Show Profile  Reply with Quote
http://www.delcoremy.com/find-a-part/product-details/10511414/

my local electrical guy hooked me up with a mounting bracket as well.

-Ken-
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n2682
Active Member

41 Posts

Posted - 05/26/2016 :  03:57:26 AM  Show Profile  Visit n2682's Homepage  Reply with Quote
do you have an oscilloscope you can test it with one of those its not a hall effect switch though. it yours will have a positive and negative wire and it draws up and down NO 5 volt ref, ground or signal wire. yours will be magnetic and should have a signal signiture that looks like a heart beat not a square wave form.

Edited by - n2682 on 05/26/2016 04:01:09 AM
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