Thread: 2001 discovery TD5 engine cut off help needed

Sounds like an electrical problem - possibly a bad connection causing the ECU to lose power. I would start looking at the wiring and connections points around the ECU and battery. Look for loose connections, including earthing points, or look for damaged wiring. It may be something simple.

Maybe the wiring to the inertia switch worn through somewhere and shorting out

I have a NANOCOM connected, and right after the engine cut-out I get a message "all five injectors (1-5) output drive peak charge is too long".

Driving back with engine off, close starting switch and re-start, it start immediately.

I had some suspicious with the following:
1. Genuine Fuel filter - was replaced- symptom 1 was happening, symptom 1 was happening.
2. Replaced fuel pump - OEM Bearmach - symptom 1 was happening, symptom 2 was gone.
3. Bypass the Interia switch - symptom 1 was happening, symptom 1 was happening.

all five injectors (1-5) output drive peak charge is too long

This is what I found on the www to check:

1. Check the ECU Earth - Not sure how to do this...
2. Check the Main Relay under the passengers seat - Not sure which relays.
3. Check for Oil on Red ECU Plug and Clean - Done, very little oil before cleaning - No change
4. Check Battery Voltage is Between 9V & 16V - Done, in range.
5. Test Injectors Using Nanocom - OK when idle
6. Check Cylinder Balances with Nanocom - balanced on idle - NOT balanced during cut-out.
7. Check both ECM Connectors - Both OK no oil - Done - No change
8. Use Injector Cleaner - liqui moly diesel injector cleaner super - Done - No change
9. Check Circuit Integrity from ECM to injector harness via engine harness connection - How to perform this


Any other ideas?

Hi, i'll tell you what i know to some points:

1. ECM earth is near the battery on that rail with 3 earth points make sure they are well tightened
2. being a Discovery there's no relay under the seat, that's a tip for Defender
3. very little oil is more than nothing so replace the injector harness ASAP , this could be the reason for the fault codes unless you have some power box fitted
...
6. check this out http://www.aulro.com/afvb/discovery-...ml#post1615896

Well thanks, I had read that post from the beginning till end
I had changed the injector loom 4 times on this car by myself, the amount of oil I had noticed is very little from my experience, this causes of light misfire but not engine cut out
The mystery is why when you put the front left wheel up high the engine cut out
No other physical human intervention can cause is to cut out, downhill uphill, nothing...
Only front left wheel high up...

I had fitted a SAFARI snorkle 6 month ago ~ 5000KM since with air filter clean.
Assuming it's the air filter the engine would cut out much sooner while accelerating.
While on the roads, the TD5 engine climbs up to 4200 RPM and then shifts the gear, this is normal.
I had a 2800 RPM limit by accelerating about a month ago but this time it's the Turbo Wastegate Valve - PMK100130 issue, was resolved.

EGR is fitted, the black smore is only when the engine is starting to cut off, I see the NANOCOM report the injectors are out of balance.
engine has ~ 330,000 KM.
Did not checked for oil in the intercooler, fitted the provent 200 about a year ago to reduce the oil coming back to engine.
MAF is new 5 month old, the VDO type one, no errors on the NANOCOM related to MAF.

It could be like I have a short somewhere and when the chassis flexes, it makes contact and stalls the vehicle.

Is it possible thile the car is on a severe side slope the intercooler is being blocked by excessive amount of oil blocking the air to the engine??? (attached sample picture).

Originally Posted by assafde

Is it possible thile the car is on a severe side slope the intercooler is being blocked by excessive amount of oil blocking the air to the engine??? (attached sample picture).

don't think so , you would have a real problem if there was that much oil in the intercooler , but take the cool side I/C hose off and dip it with a bent cable tie with the vehicle jacked up to rule it out if you like. Does it have ACE ?
I would say electrical , can you jack it up on that side until it causes the problem and start pulling on harnesses / wiring and try to isolate it that way. Its a bit low tech but it wouldn't be the first time I've found a problem doing this.

Checked the intercooler, dry as a desert, so it's not this one...
Went over the wiring from the ecu to the injectors harness, sprayed all with carburetor cleaner, also connector, not noticeable physical damage to harness
Will try to simulate the malfunction and report here

Your ideas are very successful.
Further more, opening the intercooler hoses and seeking for tons of oil, gladly I didn't find a drop, dry as a desert as should be (2 years old turbo) so it's not the way to go.


I decided to go the "electric way" as I was told by several forum members all over the world (yes, UK, US and OZI...).
After verifying I don't have excessive amount of oil in the ECU red connector, I had removed all the sleeves surrounding the wires going from connector C0171 to the ECU, and closely examine for any physical damage, well I didn't find any, but I had uses excessive amount of carburetor cleaning spray all over the C0171 connector all over, having ANY trace of oil to come out, sprayed also the wires themselves, making it easier to observe for any physical damage without the greasy layer they had.


After cleaning all electrical connectors both C0171 engine harness side and ECU side C0158, i headed for the test drive.
As I was experienced from the past, climbing with the front left wheel high enough to cut-out the engine (~ 1 meter rock) this time, surprise, the engine was still running ! but with very slight misfiring.


Drove back home and realized the logic behind engine cut-off / misfiring while the engine was tilted to the right (left front wheel up, engine tilted to the right), the injector loom is soaking with oil under the engine cover.


No escape for the fifth injector loom replacement...