Alfa Romeo Forum banner

1 - 20 of 25 Posts
F

·
Guest
Joined
·
0 Posts
Discussion Starter #1
Hi All,

just a couple of quickies. Burnt down to Devon over the weekend and just got back. There are two little annoying problems I have that I'm sure one of you geniuses will know the answers to . . . :confused:

What does it mean when driving at speed and the little red injector light on the dash keeps coming on :confused: :confused:
Is it anything to worry about or do I need to drive faster :D
I found that if I put my foot down even more it went away wink

The other thing is a funny sort of slight hunting ( those of you who are more technical will know what I mean . . . . . . I hope :D )
Under light acceleration or just cruising with fairy touches on the go peddle it seems to do a sort of hunt thing, whereby it pulls . . . . then backs off . . . then pulls . . . . then backs off . . . etc etc. This is very slight and does not cause any real problem but if I can rectify it then all the better. It seems to be what I would consider a throttle pot or aiflow meter prob :confused:

Thanx guys and gals, all your input will be appreciated :D
 
M

·
Guest
Joined
·
0 Posts
Discussion Starter #2
Hi Frankie,
Sounds to me like the classic Lambda (oxygen) sensor symptom. Could be it wants cleaning, failing that replacing. Had the same problems with my 155 V6, and a new Lambda sensor cured it immediately. By the way, if you do go to the expense of replacing it, get a genuine AR part.


Hope that helps,
Mark.
 

·
Registered
Joined
·
4,651 Posts
Frankie

What ever`s causing the injector light to come on will almost certainly be causing the hunting/surging problem you`ve got wink

Do a search for ecu codes and how to read them (you might need the master key for this)did Andymac give you it ............Basically it involves a lot of pressing of the throttle pedal to access the ecu and then it flashes the injector light to give you a code which tellls you whats wrong

Someone else will be along to make this all make sense i would think :rolleyes:
 
W

·
Guest
Joined
·
0 Posts
Discussion Starter #4
Sounds like lambda to me too. The fault code list and instructions are a "sticky" post at the top of the lounge.

wrinx
 
F

·
Guest
Joined
·
0 Posts
Discussion Starter #5
Thanx all . . . your gents . . . all of you :confused:
Did a search on injector light and it seems to be that lambda sensor and water gauge are the most common cause.
BTW I don't have a master key as AndyMac didn't have it . . . . . is that going to cause me a problem :confused: :confused:
 
W

·
Guest
Joined
·
0 Posts
Discussion Starter #6
I wouldn't worry about it until you need it :eek: Can't remember anyone needing it on here.

Try the diagnostic and see what it comes up with.

wrinx
 
R

·
Guest
Joined
·
0 Posts
Discussion Starter #7
Don't want to throw a spanner in the works, but...

I get the hunting/surging on light throttle, but no warning light. No major jolts, just changes in power that can be felt. I just thought it was ECU assuming that I was on over-run and cutting fuel, then changing its mind. Barely touching throttle during this. (On a 16v)

Rob.
 
W

·
Guest
Joined
·
0 Posts
Discussion Starter #8
The injector light doesn't always come on......

wrinx
 
B

·
Guest
Joined
·
0 Posts
Discussion Starter #9
I tried to get a code out of my 2.0 16v once but it didn't work - was I supposed to be using the master key at mar instead of a nromal key???
 
R

·
Guest
Joined
·
0 Posts
Discussion Starter #10
I don't think the accelerator code thing works on the 16v models. Not sure what our options are, other than a dealer or someone with a reader.

Someone on AO was working on a homebuild reader, but it still seems in its infancy. The hardware seems straightforward, but interpreting the results is trickier.

Rob.
 
N

·
Guest
Joined
·
0 Posts
Discussion Starter #12
I was reading something in the little red book that comes with the 155 about codes and it scared me abit. It said that once you have pressed your throtle down so many times and done this and that then every time you start the car you will have todo this process unless an Alfa garage resets the code.
 
F

·
Guest
Joined
·
0 Posts
Discussion Starter #13
1 - 2 - 2 - 4

Heated Lambda probe apparently.

Is it best to use a genuine article or an aftermarket replacement :confused: and what sort of money should I expect to pay :confused:
 
M

·
Guest
Joined
·
0 Posts
Discussion Starter #14
Genuine Alfa is about 80 quid.
I got a universal Bosch one from my motor factors for 40. You have to join wires though but it's easy.
 
F

·
Guest
Joined
·
0 Posts
Discussion Starter #15
Cheers Marlon,

Does anyone know whether it's a two wire or three wire sensor on the V6 as I can't see it . . . . oh and I'm not entirely sure where abouts it is . . . . yes yes on the exhaust somewhere . . . :D :D
 
M

·
Guest
Joined
·
0 Posts
Discussion Starter #16
I think it'll be a 4 wire. 2 white, 1 black and 1 grey. The whites are just "common" grounds
 
W

·
Guest
Joined
·
0 Posts
Discussion Starter #17
frankie69:
Cheers Marlon,

Does anyone know whether it's a two wire or three wire sensor on the V6 as I can't see it . . . . oh and I'm not entirely sure where abouts it is . . . . yes yes on the exhaust somewhere . . . :D :D
From memory its on the cat, engine side.

wrinx
 
M

·
Guest
Joined
·
0 Posts
Discussion Starter #19
...yep, it definately a four wire probe on the V6! With regards to replacement, my local (respected) Alfa specicialist refuses to fit non-Alfa lambda sensors, says its false economy, thats his opinion..... but then he's been working with Alfas for over 30 years!

Mark :)
 
M

·
Guest
Joined
·
0 Posts
Discussion Starter #20
Who makes the Alfa sensors ??? I would say the Bosch one I got would be good as....
Anyway, I still have the old OE Alfa one. It wasn't faulty, just couldn't unscrew it from the cat when I put on the decat pipe, so had to get another one :( .
At least I won't have to buy anymore lambda probes...
 
1 - 20 of 25 Posts
Top