detroit diesel ddec III

[predator 58]

Hi, and thanks for membership,

can anyone help, 8v 92 with ddec III, engine starts fine, 600rpm. low idre down to about 400 rpm. works fine. Do not get more than 800 rpm. Panel failure: no rpm, no engine temp, no oil pressure.info Temp and pressure from gearbox work properly. what could be wrong?

i have 2 like engine som is it somthing i can test?

 

[Assassin]

The 92 series was an updated 71 series which was a later big bore version with higher working RPM.

Being a 2 stroke it relies upon the pressure from the blower to give it sufficient air pressure to run correctly, so begin here, are the blower belts correctly tensioned and in good order as any loss of air pressure affects the running as this provides not only the air for running the engine, but also the scavenging effect which prevent them from running through supplying insufficient air, then check the engine for air leaks as any leakage reduces the air pressure and restricts the running through insufficient air pressure.

 

[Assassin]

Depending upon variant? other common issues are related to the electronic throttle if fitted and corrosion and snapped wires are a problem as are earth faults and checking the electronic throttle is a must do and checking the gaskets fitted to them is worthwhile as they had earlier silicon gaskets which simply broke up and allowed water ingress.

If yours has the ECM's fitted then the same problem here, check the silicon gaskets as they crack up and let water in and cause several circuit board issues, corrosion is the obvious one and in many cases they have memory chip failures which needs a fault code reader to identify them, but the memory chips can be replaced by electronics specialists but your chips need their memory reprogramming.

 

[Latestarter1]

Look at the round Deutch diagnostic connector check if it is 6 pin or 9 pin this will tell you if you have J1587 or J1939 data link, purchase a suitable hand held scanner off Ebay some do both protocols.

Have you tried accessing blink codes?? They are SAE so you can Google them.

If problem is with BOTH motors you could simply have an earth problem, Cat, Cummins and Detroit ECM's are wired to be always hot but with switched ignition feed..

Good luck

 

[predator 58]

Thanks for the answer, there is only 1 engine that has a problem, which slowly starts and runs engine nicely, but does not have temp, rpm, oil pressure information on emd display. and I get no more than 800 rpm. it stops electronically it seems like. Will all the info come to the ECM box? from sensors?

 

[predator 58]

display flashes 4 times when I turn on ignition

 

[volvopaul]

display flashes 4 times when I turn on ignition

Just had a look , there are 3 fault codes that start with a 4 , they are all critical and place the engine into what I’d call limp mode . You need to access it deeper to find out what the main issue is , it could be simple bad connection most probably water or corrosion related , go around the engine loom and unplug as many points as you can and examine for green corrosion, take spray can or electrical contact cleaner .

 

[Assassin]

To add to VP's answer, once cleaned with electrical cleaner, let it evaporate and reconnect, then spray the whole connector with Waxoyl as this protects electrics and is inert.

 

[predator 58]

Thanks again, when I've seen and cleaned contacts, is there any reset I have to do? or just turn on ignition as usual and display should show temp, rpm, oil pressure? That's when cables out of ECM are thinking about? This happened after a turbo exchange, but can not figure out what's wrong

 

[predator 58]

Hello again, i need to buy a ECM to my engine , with ECM Nr : R 23518743 is it anybody so have ??

 

[Divemaster1]

Have you spoken to Mitchells ?? Think you can get a remanufactured one with some sort of DD warranty if you go that route ...

 

[predator 58]

I know, but had hoped someone had 1 used I could buy

 

[Divemaster1]

Not many owners with DD's on the forum to my knowledge (a handfull from recollection) ... even less with ddec's ... Second hand in UK, e-bay (no warranty) or re-furb is best options ... slightly higher risk is to get shipped from US...

 

[predator 58]

Hi, I have purchased an ECM with the same DDE No and Motorola No. It's on an industrial engine. I'm going to have it for a marine engine. Both engines are clearly 8v92. Will the engine start and work ok?

 

[Divemaster1]

Hi, I have purchased an ECM with the same DDE No and Motorola No. It's on an industrial engine. I'm going to have it for a marine engine. Both engines are clearly 8v92. Will the engine start and work ok?

The industrial engine may have been governed by the ECM to continous load ... usually set around 1800 RPM. Do you know the rating of the industrial engine ?

The SS' engines is probably JT Marinising kits and from my recollection pleasure rating which is quite high compared with the industrial engines... so all of this depends on how the ECM bought is configured and thus how the engine installed sensors and solenoids (replaced the old fuel rack from the pure mechanical engines) are set up to communicate with the ECM.

I believe (but cannot confirm) that the exhaust valve lifting mechanism on the ddec engines are still mechanical and thus the crucial exhaust valve timing should still be OK..

I am un-comfortable giving detailed advise on the ECM engines as I do not have experience with the interface between the mechanics and the electronics of the engine, so I would seek some formal advise from DD (Mitchells) on weather the module is plug&play (ie', if the ECM will adapt governance settings based upon the information received by the engine sensors), or if it will need re-mapping to the higher leisure rating.

 

[predator 58]

hi, ecm is now repaired and no wrong codes come up. I still don't get rpm and when I give gas it just smokes. idling at 600 rpm and when giving gas it goes up to 850 to then nothing else happens to smoke, what can it be?

 

[Divemaster1]

Is original ECM repaired or did you fit the replacement which was from another engine ?

If from another engine (eg different configuration) ... Timing, injectors etc. (as an industrial engine configuration will be), then ECM may have to be re-programmed to accept that the input from your engine's sensors are correct values ...

 

[predator 58]

IT have repared and update to my engine

 

[Divemaster1]

If you have no sensor input to the ECM which the ECM in turn can send to the instrument panel, then you will not have much joy...

You need to find the sensors/senders and get these checked for connections etc ... if you have a 100% sensor signal failure then it may be a wiring harness issue ... once again the DDEC engines are not my strongest point, so I'd get a pro out from Mitchells to help me at this juncture ...

 

[predator 58]

A have all sensor input but the engine dont go over 800 rpm