Alfa Romeo Forum banner

1 - 20 of 34 Posts

·
Registered
Joined
·
14 Posts
Discussion Starter #1 (Edited)
Hello Alfisti,

I have been trying to resolve the problem of strong engine shake. The problem is mostly noticed during a cold start. The situation is a little better when the engine is warmed up. Otherwise, the engine has no other problems (for now). Excellent traction, no other problematic vibrations, does not turn off in idle or while driving, fuel consumption is about 9-10 l/100km in the city. The car has 198,000 km (imported from Italy). Much has been done to address this and other failures:

- intake manifold was cleaned,

- swirl flaps at the intake manifold were removed - the holes filled with plugs,

- EGR valve was cleaned,

- two engine mounts were replaced (50502603 and 50502602),

- new flywheel and clutch set were installed,

- bendix on starter replaced,

- 4 engine glow plugs were replaced,

- timing belt, water pump and thermostat (serpentine belt and tensioners were not replaced since they are ok)

- two fuel injectors were cleaned and tuned,(one had a large deviation of about 2.5 - 3 and the other about 1 - diagnostic used Fiat EcuScan),

- new battery was installed 5 months ago.

The problem occurs in winter and now at this time of late spring. The car arrived from Italy with this problem, and I was not been able to resolved the problem until today. Diagnostics does not report any errors.

I guess there has been a lot to say about this topic already. I would be grateful if someone has a similar experience, because my car mechanic ran out of ideas. I wouldn't even pay attention because there is no problem in driving, but the engine just shakes like crazy when starting and there is certainly something wrong.



Greetings,

Aleksandar
 

·
Registered
Joined
·
9 Posts
I have this exact problem, It got better when I replaced my failing battery but was not resolved.

I know I have no problems with plugs or with engine mounts, My car still has it's swilrl flaps and EGR hasn't been cleaned in 2 years (both will be addressed this month) but it's been driving me insane.

My car did have 1 error in it's service history stating that there is an intermittent fault in the starter relay, although my startup is rough every time I will ask my mechanic to address this also.

I was convinced I ahd a swirl flap problem but reading your post now I'm not so sure.... (I will have them removed and blanked regardless!)
 

·
Registered
Joined
·
14 Posts
Discussion Starter #3
Thanks for sharing. I replaced the battery few days after I purchased the car. Maybe the battery does not have sufficient capacity. That might be potential issue. As far as swirl flaps, I read somewhere that air leak with the early models, which have aluminum intake manifold, could cause engine to shake. I installed blanks but it might be better and cheaper to weld the holes. Cleaning EGR and intake manifold is a must. Many people did hydrogen decarbonization of engine (I have not personal experience). Many positive comments.

By the way starting has improved last couple of days. Maybe due to the warmer weather.


I have this exact problem, It got better when I replaced my failing battery but was not resolved.

I know I have no problems with plugs or with engine mounts, My car still has it's swilrl flaps and EGR hasn't been cleaned in 2 years (both will be addressed this month) but it's been driving me insane.

My car did have 1 error in it's service history stating that there is an intermittent fault in the starter relay, although my startup is rough every time I will ask my mechanic to address this also.

I was convinced I ahd a swirl flap problem but reading your post now I'm not so sure.... (I will have them removed and blanked regardless!)
 

·
Registered
Joined
·
9 Posts
Thanks for sharing. I replaced the battery few days after I purchased the car. Maybe the battery does not have sufficient capacity. That might be potential issue. As far as swirl flaps, I read somewhere that air leak with the early models, which have aluminum intake manifold, could cause engine to shake. I installed blanks but it might be better and cheaper to weld the holes. Cleaning EGR and intake manifold is a must. Many people did hydrogen decarbonization of engine (I have not personal experience). Many positive comments.

By the way starting has improved last couple of days. Maybe due to the warmer weather.

I put a battery above the spec of that in the car when I bought it, larger capacity and higher CCA than the original so doubt that is the problem, I have to say though the difference in weather makes the problem slightly better (maybe 20%) but so does starting the engine when hot (I.e if you have stopped to get fuel and have only turned the engine off for 2/3 minutes).

Either way I have the problem regardless of temperature.

I'll let you know if my mechanic can find the problem, aside from that we will have to wait for other replies!

there is also a thread on here with the same issue that was never solved, I check every 2/3 weeks but no answers yet.


it is a different engine to ours though.......
 

·
Registered
Joined
·
14 Posts
Discussion Starter #5
Thanks. I will take a look. Very kind of you. Another theory that there is not sufficient fuel pressure during ignition. I asked my mechanic if the fuel pressure regulator could cause the problem, but he said that is not possible since the engine would stop working etc. Anyhow, we share the same symptoms, therefore the cause could be similar. Happy to continue with the communication. I will share my experience as soon as I visit my mechanic again.
 

·
Registered
Joined
·
9 Posts
Thank you, I look forward to your reply!

My specialist is closing (retirement) on June 26th so hopefully he will fit me in (I'm trying to make an appointment tomorrow).

I will let you know what the outcome is if I can get the work done!
 

·
Registered
Joined
·
355 Posts
This could possibly be due to fuel leak back-air gets into the fuel line causing the fuel to drain back to the tank-sorry I’m not totally familiar with all the details of this fault but may be worth looking into.
Some have installed a non-return valve in the fuel line to solve-may be worth looking into?
 

·
Registered
Joined
·
14 Posts
Discussion Starter #8
This could possibly be due to fuel leak back-air gets into the fuel line causing the fuel to drain back to the tank-sorry I’m not totally familiar with all the details of this fault but may be worth looking into.
Some have installed a non-return valve in the fuel line to solve-may be worth looking into?
Thanks Paul. Interesting theory. I will definitely look into. It is interesting that the engine works smooth after ignition. No problems whatsoever. I guess it is electric or fuel related issue (or both).
 

·
Registered
Joined
·
355 Posts
I looked into it more -it seems the culprits are the leak off pipes connected across the top of the engine - they can become brittle and crack in turn allowing air in causing the fuel to drain back.
There are kits available that replace the pipes and connectors-a simple easy fix.
Maybe check yours it’s a common fault on the Vauxhall forums where the Fiat Diesel engines are used.
 

·
Registered
Joined
·
69 Posts
I looked into it more -it seems the culprits are the leak off pipes connected across the top of the engine - they can become brittle and crack in turn allowing air in causing the fuel to drain back.
There are kits available that replace the pipes and connectors-a simple easy fix.
Maybe check yours it’s a common fault on the Vauxhall forums where the Fiat Diesel engines are used.
Paul,
Can you be more specific - which pipes?
Do you mean the high pressure fuel pipes from common rail, which feed injectors?
 

·
Registered
Joined
·
355 Posts
No it’s the leak off pipes that return the unused fuel back to the pump-look like small diameter black vac pipes on each injector connected with small plastic connectors-the pipes and fitting deteriorate/become brittle with the heat.
 

·
Registered
Joined
·
14 Posts
Discussion Starter #12
Thanks for the tip. I will go to my mechanic next week and will check out the piping. Will report the outcome.
 

·
Registered
Joined
·
355 Posts
Here’s a picture there are variations across the different model years - this pipe connected across top of injectors.
 

·
Registered
Joined
·
355 Posts
Sorry just seen this can you have a look at your pipes and see which version you have - depending on where the pipe branches from return line - you have L shaped and T shaped connectors - you will have both but you need to check how many of each.
 
1 - 20 of 34 Posts
Top