About to give up... cannot get engine running..

Firstly, I had this topic on the defender section but I think i need to take it here to the engine section to get engine heads on the case since I am about to have a nervous breakdown.

It strated out with engine loosing power on highway (as if turbo would turn off) then stumbling home 30km. Starting again like normal the next day and then after some 20km loosing power and then dying. Now, IF, I get it started after a long cranking, LOADS of gray smoke will come from exhaust until engine stalls.

REPLACED PARTS:

- new VOD Fuel pump, all lines blown clean with air
- new Crank position sensor
- new Fuel regulator
- new injector washers and o-rings
- timing checked
- fuel preassure checked
- no oil in loom
- injector harness replaced
- CO2 analyzed from cooler fluid, negative
- new fuel filter

my ony two ideas left are blown injector(s) or blown head gasket. But since the cooler fluid gave negative on CO2 test I would point at injector.... Any opinions or further ideas what to ckeck. I am seriously at bear down point with my 110 HCPU right now. Apreciate all support and advice. Thanks,

northernbobber said:

Firstly, I had on the defender section a thread about this but I think i need to take it here to the engine secton to get engine heads on the case since I am about to have a nervous breakdown.

I strated out with engine loosing power (as if turbo would turn off) then dying. Starting again like normal and then after some 20km loosing power and then dying. Now IF i get it started after long cranking LOADS of gray smoke from exhaust until engine stalls.

REPLACED PARTS:

- new VOD Fuel pump, all lines blown clean with air
- new Crank position sensor
- new Fuel regulator
- new injector washers and o-rings
- timing checked
- fuel preassure checked
- no oil in loom
- injector harness replaced
- CO2 analyzed from cooler fluid, negative
- new fuel filter

my ony two ideas left are blown injector(s) or blown head gasket. But since the cooler fluid gave negative on CO2 test I would point at injector.... Any opinions or further ideas what to ckeck. I am seriously at bear down point with my 110 HCPU right now. Apreciate all support and advice. Thanks,

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dying is fuel/air starvation ,could be injector washers putting gasses in fuel,egr stuck open,air filter blocking maf or poor injectors

jamesmartin said:

dying is fuel/air starvation ,could be injector washers putting gasses in fuel,egr stuck open,air filter blocking maf or poor injectors

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Yes, It feels like fuel starvation. But I have preassure, even blocked the return to maximize the preassure to try it out, no difference, maybe slightly easier starting... No difference with new injector washers vs. the old ones. I have bypassed the EGR. I have a new K&N air filter. So does it leave me with screwed up injectors?

northernbobber said:

Yes, It feels like fuel starvation. But I have preassure, even blocked the return to maximize the preassure to try it out, no difference, maybe slightly easier starting... No difference with new injector washers vs. the old ones. I have bypassed the EGR. I have a new K&N air filter. So does it leave me with screwed up injectors?

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the starts well but dies is usually fairly definitive air or fuel,head gasket would effect starting or after warming up,gas tests in coolant arent proof either way

jamesmartin said:

the starts well but dies is usually fairly definitive air or fuel,head gasket would effect starting or after warming up,gas tests in coolant arent proof either way

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Mine does NOT start well, hardly starts... but IF I get it to start it will die within a minute.

northernbobber said:

Mine does NOT start well, hardly starts... but IF I get it to start it will die within a minute.

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poor starting is usually poor compression ie wear or head gasket or with td5 fuel issue, from what you say head gasket or injectors id think,other info might change that

I might start then by taking the injectors to a diesel shop and have them refurbish them...

northernbobber said:

I might start then by taking the injectors to a diesel shop and have them refurbish them...

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not cheap but then neither is proving head gasket, but then all you can do is follow logic

yeah, at least have them tested. with good luck there might be only one faulty injector

I also have a new refurbished starter. A couple of times now during the cranking I got a hard metallic clunk and starter would not spin, but then after trying again it spun normal. Would this be solenoid playing up after some serious cranking?

northernbobber said:

I also have a new refurbished starter. A couple of times now during the cranking I got a hard metallic clunk and starter would not spin, but then after trying again it spun normal. Would this be solenoid playing up after some serious cranking?

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or poor injector flooding a cylinder,or coolant

true. I have not been loosing any coolant. But poor injector sounds like possible. Any damage from that ususally? the clunking I mean

northernbobber said:

true. I have not been loosing any coolant. But poor injector sounds like possible. Any damage from that ususally? the clunking I mean

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at the extreme is conrod bending,so permanent low compression and incorrect burn that gives ie dirty smoke

northernbobber said:

I also have a new refurbished starter. A couple of times now during the cranking I got a hard metallic clunk and starter would not spin, but then after trying again it spun normal. Would this be solenoid playing up after some serious cranking?

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Do you mean it spins and the clunk comes while it's spinning and stops or you hear the clunk when you turn the ignition to start?

northernbobber said:

It strated out with engine loosing power on highway (as if turbo would turn off) then stumbling home 30km. Starting again like normal the next day and then after some 20km loosing power and then dying.

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did you rule out a management issue by plugging in a compatible tester cos on defenders the topside switch failure is quite common and can give the symptoms described in the first post cos the ECU goes mad and can close some injectors and let other fully opened, any combination between the 5 injectors is possible

if that's the case the "topside switch failure" fault code will be stored in the ECU, i've seen this fault myself few times, so you better rule it out before taking the engine apart, see this http://www.ecutesting.com/land-rover/land-rover-defender-discovery-td5-ecu-fault.html

or google out "td5 topside switch" cos the web is full with it and shows various symptoms

sierrafery said:

Do you mean it spins and the clunk comes while it's spinning and stops or you hear the clunk when you turn the ignition to start?



did you rule out a management issue by plugging in a compatible tester cos on defenders the topside switch failure is quite common and can give the symptoms described in the first post cos the ECU goes mad and can close some injectors and let other fully opened, any combination between the 5 injectors is possible

if that's the case the "topside switch failure" fault code will be stored in the ECU, i've seen this fault myself few times, so you better rule it out before taking the engine apart, see this http://www.ecutesting.com/land-rover/land-rover-defender-discovery-td5-ecu-fault.html

or google out "td5 topside switch" cos the web is full with it and shows various symptoms

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Thanks, the top switch was new to me. I have a nanocom and it hasnt given me any fault codes due to this issue. That's why I have been pretty set on fuel pump issue until I switched it and no change. Could the ecu have an issue without giving me any fault codes? Or faulty injector without fault codes? And the clunk sound has pccured a couple of times just as I turn the engine over with starter. It's the first sound and then the starter kind of jams. And then I turn a second time and it turns over as normal.

When it runs at idle what are the injector balances like.
Also have you tried running it without filler cap on as it’s been heard before that a faulty cap can cause a vacuum stopping fuel from flowing properly

+1 ^^^^

johnlad said:

When it runs at idle what are the injector balances like.
Also have you tried running it without filler cap on as it’s been heard before that a faulty cap can cause a vacuum stopping fuel from flowing properly

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Just got it fired up (hardly) with nanocom plugged in, when throttled maximim +-10. But on idle +40 as max on nr3 and 4 and 6 gave 23 and 31. Could one faulty make others make huge compensation? I mean if nr 3 is blown could 4 and 5 play up too?

Yes, if one is at fault the ECU will try to compensate through the others and the balances are going mad

There the worst balance’s if heard of, you could try swooping no3 injector with say number 1 and see if the faulty balance follows it or just fit known good injector