An old issue rear it's ugly head!

For the technical things.
Post Reply
petrolhead
Posts: 32
Joined: Thu Apr 24, 2014 9:07 am

An old issue rear it's ugly head!

Post by petrolhead » Sun Mar 06, 2016 4:01 pm

As you may have seen on my other threads, a horrendous misfire, more like a hard ignition cut, became apparent at around 2500 rpm, but with a fluctuting rough idle, i suspected the Air Flow Meter was finally failing altogether.

However, after eliminating everything under the bonnet i thought i'd at least try the diag socket, and both the 164 diag program and multiecuscan identified ecu power drivers or actuator drivers depending on the program.

The ecu was sat right in front of me anyway as its in the passenger side of the centre console along with the diag socket, and all appeared normal, until i opened up the socket connector to find around 30 connection pins swimming!


2016-03-03 14.14.54.jpg
2016-03-03 14.22.29.jpg


So, all dried cleaned and repaired, the cars is back to its former awesomeness, but, i'm now looking to cure once and for all the problem, which as the thread title suggests, i'm told this was not unheard of back when 164's were current.

A £2.50 car wash would often result in a £700 ecu bill. Somewhere there is a weakness in the firewall sealing, or a grommet or similar, water runs down the loom straight into the upward mounting connector, Smart!

So be warned folk, this could be anyone of you guys next rain storm or car wash!


Time to start sealing, siliconning, foaming etc etc....

User avatar
Alfan
Q4 owner
Posts: 1231
Joined: Thu Oct 22, 2009 8:20 pm
Location: Denmark
Contact:

Re: An old issue rear it's ugly head!

Post by Alfan » Sun Mar 06, 2016 4:47 pm

Looking at that, I am surprised you have been able to start the car at all!!!

At least you find the reason, the leak might be harder. Placing the ECU differently might be the first thing to do...
1994 Alfa Romeo 164 Q4 Proteo Rosso 550.000km
1989 Lancia Thema 8.32 Verde Indy 270kkm
2001 Alfa Romeo Spider 3.0 24V Blue Lightning 65kkm
2011 Alfa Romeo Giulietta Multiair TCT Bianco Pastello 195kkm
2015 Alfa Romeo 4C Rosso Competizione 100kkm

petrolhead
Posts: 32
Joined: Thu Apr 24, 2014 9:07 am

Re: An old issue rear it's ugly head!

Post by petrolhead » Sun Mar 06, 2016 5:05 pm

Yep, i was amazed it started at all too, but it was getting tougher the more i was trying stuff so i'm sure it would have got to that point shortly.


agreed, finding the water source could be tricky, but possibly, or even largely contributed to internal condensation from being stood around for quite a period here in damp ol'blighty!

i spotted then droplets forming and ignored it too long, My Bad!

HaydnW92
Posts: 248
Joined: Wed Oct 22, 2014 8:47 pm
Location: United Kingdom

Re: An old issue rear it's ugly head!

Post by HaydnW92 » Sun Mar 06, 2016 6:50 pm

Ouch, that's definitely something to keep an eye on then. Thankfully it doesn't rain much in the UK...pfft yeah right!
1999 Alfa GTV 3.0 V6 24V
1992 Maserati 222 4V (project)

(Ex)1994 Alfa 164 Q4 3.5 Savali Cosworth
(Ex) 1991 Alfa 164 3.0 Cloverleaf
(Ex) 1995 Alfa 145 1.6 8V

User avatar
wilco
3.0 V6 24V owner
Posts: 757
Joined: Wed Oct 14, 2009 7:26 pm

Re: An old issue rear it's ugly head!

Post by wilco » Sat Apr 30, 2016 1:36 pm

"nice" find :D
Henry Ford, 1939: "Every time I see an Alfa Romeo pass by, I lift my hat."
--Alfa Romeo 164 3.0 V6 24V Q4--
--Alfa Romeo 164 3.0 V6 24V--

Post Reply