Boost issue v40, 1.9, 2003

casc1984 · Mar 15th, 2019, 10:15

Hello from Portugal!

It happend 3 times in 1 year.

When i start the car and start driving i feel the car not responding when i acelerate. The car get speed but ithout the normal boost. It never happened during driving, i mean, start the car, start driving with car in normal conditions and during the march lose power/boost, it always happen when i start the car and start driving, i feel imediatly in the 1st and 2nd gear...no normal boost. When i feel it, normally i restart the car and problem is solved but since yesterday the car stays same..... the car restart is not working...

I hope made myself clear!!

Thanks for any further help.

aldred309uk · Mar 16th, 2019, 20:49

I had boost issues with my 1.9d when I got it a few years ago. My issue was caused by the egr valve (Exhaust Gas Recirculation). I blanked mine off with a metal plate between the actuator and the valve itself to stop the valve being opened. You could try unplugging the actuator and take that for a test and hope that shows you the problem.

I have tried to make myself easy to translate, hope I have helped.

AndyV7o · Mar 16th, 2019, 21:29

It is likely to be the egr.
Unplugging may diagnose, but not if its sticking open, which is a likelihood.
Is yours 105 bhp or 115, 130?
If 105 the egr valve and housing clog horrifically!

casc1984 · Mar 16th, 2019, 21:45

Quote:

Originally Posted by aldred309uk

I had boost issues with my 1.9d when I got it a few years ago. My issue was caused by the egr valve (Exhaust Gas Recirculation). I blanked mine off with a metal plate between the actuator and the valve itself to stop the valve being opened. You could try unplugging the actuator and take that for a test and hope that shows you the problem.

I have tried to make myself easy to translate, hope I have helped.

Done since 2013, plate metal between the actuator and electronically eliminated too......

It seems that some valve is not opening when i turn on the car.....

AndyV7o · Mar 16th, 2019, 21:52

Your map sensor might be screwed or the pressure feed to it blocked. On the 105 (not sure about other two) this feed comes from egr housing and gets clogged with crud. No map sensing pressure or map rataining pressure, could fool engine or make it 'go safe' and open boost solenoid keeping boost low rather than potentially damaging engine.

casc1984 · Mar 16th, 2019, 22:30

Quote:

Originally Posted by AndyV7o

Your map sensor might be screwed or the pressure feed to it blocked. On the 105 (not sure about other two) this feed comes from egr housing and gets clogged with crud. No map sensing pressure or map rataining pressure, could fool engine or make it 'go safe' and open boost solenoid keeping boost low rather than potentially damaging engine.

It seems to me an idea....tomorrow i'll connect the car to failures reader machine and see what failures are registered in the ECU.

Thanks

casc1984 · Mar 16th, 2019, 22:31

Quote:

Originally Posted by AndyV7o

It is likely to be the egr.
Unplugging may diagnose, but not if its sticking open, which is a likelihood.
Is yours 105 bhp or 115, 130?
If 105 the egr valve and housing clog horrifically!

115 and it has 350000km.

aldred309uk · Mar 16th, 2019, 22:50

When my egr was causing boost problems I disconnected my mass air flow sensor which fixed my problem. The sensor wasn't the cause but it helped me to understand that the problem was electrical and not mechanical.

casc1984 · Nov 2nd, 2019, 21:34

Hello again.

After erase the faults codes from the ECU I had the car running normally till 2 days ago.

Si, after erase the faults, the car was okay during 7 months.

The symptoms back.

Seems that the car goes in save mode.....

Made today new diagnosis to the ECU and the defaults are:

1826 permanent

1815 intermittent

1806 intermittent

1802 intermittent

1804 intermittent

Any idea where to start from?

Thanks for any help.

doudou · Nov 5th, 2019, 19:02

First one seems to be glow plug relay.

Should not affect boost tough...

Second one is boost pressure solenoid.
Seems that your actuator is going bad. It is quite easy to check and replace as it seats on the firewall on the passenger side.

Mar 15th, 2019, 10:15	#1
casc1984 New Member Last Online: Mar 19th, 2024 23:19 Join Date: Oct 2014 Location: Arrifana	Boost issue v40, 1.9, 2003 Hello from Portugal! It happend 3 times in 1 year. When i start the car and start driving i feel the car not responding when i acelerate. The car get speed but ithout the normal boost. It never happened during driving, i mean, start the car, start driving with car in normal conditions and during the march lose power/boost, it always happen when i start the car and start driving, i feel imediatly in the 1st and 2nd gear...no normal boost. When i feel it, normally i restart the car and problem is solved but since yesterday the car stays same..... the car restart is not working... I hope made myself clear!! Thanks for any further help.

Mar 16th, 2019, 20:49	#2
aldred309uk Member Last Online: Apr 20th, 2021 22:33 Join Date: Sep 2015 Location: Blackburn	I had boost issues with my 1.9d when I got it a few years ago. My issue was caused by the egr valve (Exhaust Gas Recirculation). I blanked mine off with a metal plate between the actuator and the valve itself to stop the valve being opened. You could try unplugging the actuator and take that for a test and hope that shows you the problem. I have tried to make myself easy to translate, hope I have helped. __________________ Phase 2 1.9tdi V40

Mar 16th, 2019, 22:50	#8
aldred309uk Member Last Online: Apr 20th, 2021 22:33 Join Date: Sep 2015 Location: Blackburn	When my egr was causing boost problems I disconnected my mass air flow sensor which fixed my problem. The sensor wasn't the cause but it helped me to understand that the problem was electrical and not mechanical. __________________ Phase 2 1.9tdi V40

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Mar 16th, 2019, 21:29	#3
AndyV7o Premier Member Last Online: Jun 21st, 2021 20:47 Join Date: Jun 2018 Location: Creswell	It is likely to be the egr. Unplugging may diagnose, but not if its sticking open, which is a likelihood. Is yours 105 bhp or 115, 130? If 105 the egr valve and housing clog horrifically!

Mar 16th, 2019, 21:52	#5
AndyV7o Premier Member Last Online: Jun 21st, 2021 20:47 Join Date: Jun 2018 Location: Creswell	Your map sensor might be screwed or the pressure feed to it blocked. On the 105 (not sure about other two) this feed comes from egr housing and gets clogged with crud. No map sensing pressure or map rataining pressure, could fool engine or make it 'go safe' and open boost solenoid keeping boost low rather than potentially damaging engine.

Nov 2nd, 2019, 21:34	#9
casc1984 New Member Last Online: Mar 19th, 2024 23:19 Join Date: Oct 2014 Location: Arrifana	Hello again. After erase the faults codes from the ECU I had the car running normally till 2 days ago. Si, after erase the faults, the car was okay during 7 months. The symptoms back. Seems that the car goes in save mode..... Made today new diagnosis to the ECU and the defaults are: 1826 permanent 1815 intermittent 1806 intermittent 1802 intermittent 1804 intermittent Any idea where to start from? Thanks for any help.

Nov 5th, 2019, 19:02	#10
doudou New Member Last Online: Nov 6th, 2019 14:03 Join Date: Oct 2015 Location: Lyon	First one seems to be glow plug relay. Should not affect boost tough... Second one is boost pressure solenoid. Seems that your actuator is going bad. It is quite easy to check and replace as it seats on the firewall on the passenger side.

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