Running smoothly
Hungarian Q4 engine rebuild & modifications
Hello!
I'm from Hungary. I think I'm the only one on this forum.
So... When I bought my Q4 (around ARPIL of 2007), it was quite weak. (As it turned out, the head gasket was guilty.)
So I decided to rebuild the engine, and do some modifications that I always wanted to do.
So I'll post some pictures, with short comments.
If you'd like to know something, just ask me!
Oh, by the way...I'm not a professional, just a hobbist.
Running smoothly
Running smoothly
Running smoothly
Running smoothly
Running smoothly
President
Site Admin
Hi Gery, looks like you are pretty handy with a spanner. Good luck with all the work. Oh I moved your thread into the readers cars section.
Steve
1994 Alfa Romeo 155 Q4: Dozeing in the garage.
2009 Audi A4 tdi: Everyday drive.1994 Alfa Romeo 155 , 1995cc Std Standard Black
Vice President
Site Admin
This is some fantastic work. I love the paint job on the rocker cover. I may do something similar. Keep up the good work!
1993 Alfa Romeo 155 Q4 , 2.0 Turbo
Vice President
Site Admin
An essential for a rebuild job. Wont be long until all the originals are rusted through
1993 Alfa Romeo 155 Q4 , 2.0 Turbo
Vice President
Site Admin
Dirty idler valve
Ok i do not understand something i ordered a new factory hose conection and the main alfa dealer in slovenia said they are not in stock anymore not even in italy so the question is where did you get it!!
I swear i didnt do it!
Running smoothly
From a friend of mine, he sells stuff for alfas, and has some in stock of special, and rare parts.
http://www.torjay-tuning.hu/site/?page=Kapcsolat
Send him a mail, and he will answer.
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Chip tuning
Great pictures, thanks for posting them, its very instructive to be able to see exactly how others are approaching the same issues that you are trying to deal with.
Jimn~
DeCat fun
Instructive indeed, thank you Gery. Keep up the good work.
Cheers,
Cristian.
Alfa Romeo 155 Q4 WB '95
Alfa Romeo per sempre !
Running smoothly
Thanks guys!
Running smoothly
A few new shots.
It's working now, but I still have the problem that the boost won't go any higher, than 0.5bars. Before rebuild it reached even 1.5bars sometimes.
( Not original chip, I have the file from maxiboost:
http://members.lycos.co.uk/maxiboost/
http://members.lycos.co.uk/maxiboost/Temp/ )
My other problem is that on idle, fuel pressure is a bit under 2bars.
Oh, and I have a little oil leak somewhere on the underside of the engine.
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Dirty idler valve
on idle whit vacuum hose atached or detached?
I swear i didnt do it!
Running smoothly
With attached vacuum hose.Originally Posted by Stuntz
Dirty idler valve
hehe standard is 2.5 bar whit detached vacuum hose check that! i think nothing is wrong. But check it and also if you have boost at 1.4 bar pressure should be set to 3.0 bar whit detached vacuum hose. not boosting could be several problems mine was a faulty temeprature sensor.
I swear i didnt do it!
Running smoothly
Oh, thanks! I'll check that!
Do you have any other ideas what else can cause low boost pressure?
Last edited by Gery83; 15-06-08 at 17:39. Reason: wrong spelling :)
Dirty idler valve
faulty pierburg vavle. faulty wiering to pierburg valve. Is it possibe taht oyu have a leak somewhere in the boost system?
I swear i didnt do it!
Running smoothly
There is no leak, thats sure now!
I tested the system, so that I plugged the inlet side of the turbo, and I connected an aircompressor on it. I filled it up to 2bars, and the only place where air came out was the oil vapour air filter.
The pierburg valve is new, so if there is any problem with it, than with it's cable.
Tomrrow I'll put a signalling led on it, so I can see if it's working while I drive.
What sensor was wrong in your car? The IAT (= Intake Air Temperature) sensor on the mainfold?
Thanks!
Dirty idler valve
No the water temeprature on the thermostat.
Ps your friend is going to get me the ruber hoses. You should come to show us your q4 somtime.
I swear i didnt do it!
Running smoothly
Thanks!
I know, I asked him to send one for you!
By the way... I want to see some photos of your car!
Where can I find them?
Last edited by Gery83; 17-06-08 at 15:46. Reason: missed some letters... :D
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