Alfa Romeo Forum banner

1 - 8 of 8 Posts

·
Registered
Joined
·
100 Posts
Discussion Starter #1
Got a warning "Ping"and a "Motor Control System Failure" message whilst traversing the last few roundabouts exiting M Keynes on Saturday following a session of playing with model boats at Willen Lake. Fortunately, engine behaving it self with no signs of any major issues.

On purchasing my Blackline JTS GT last October, (From A Jag main dealer) I was aware that there was insulation tape around a section of the moulded "Egg Box" rubber induction pipe in the area that looks like a joint but isn`t. Inspection on Saturday showed that the tape had shrunk or lost a wrap as there was adhesive in evidence either side of the tape in situ that may have been applied to seal a split. Upon further inspection today, prior to getting car booked in, I discovered that by gently pushing / easing on the pipe, about two inches away from the existing tape area, a split opened up for about a quarter of the circumference of the pipe. Upon taking hands away the split completely disappeared partly due to being masked by the raised rib running the circumference of the pipe. I am assuming that air is being drawn in here plus air from the taped section as well!!

Subject to hooking up and expert opinions of my nearly local indie the fault should lie with the pipe that will be replaced in any event. The only signs that I have had that something might have been a bit amiss was that if stuck in stop start traffic the revs were slow to drop back down to 900rpm on tick-over with foot off the throttle from say about 1,500rpm when moving. I have been getting about 35mpg on countryside runs (50 mile round trips) but with a bit of town, traffic delays and roundabouts to holding it back to this figure.

I post this in case it helps others or if anyone wants to pass comment.
 

·
Registered
Joined
·
9,912 Posts
you got an air leak because of the split so air flow measurement is low and ecu trying to counter it ....you should have got garage to replace it last October ....
 

·
Registered
Joined
·
100 Posts
Discussion Starter #3
I admit that I should have been more concerned or suspicious, as to what was going on underneath the tape but I thought it was a joint with sealing tape to complete the seal rather than hiding a split. This is my first experience of owning an Alfa and since October it has been to to a branch of the supplying dealer for warranty work where it had a multi point health check plus it had a full service later at a local independent Alfa specialist who also gave it (another) a multi point health check neither of which highlighted an issue with the pipe so I am not feeling too guilty since I have probably identified the problem myself especially as there was no mention or advisories, in any of the previous servicing bills that I have. Your reply and comments are appreciated:rolleyes:
 

·
Registered
Joined
·
1,374 Posts
My 1.8ts 156 surges when I go into neutral after diving for a bit. It will surge from about 900 to 1200 about 3 or 4 times before settling. Could this be an air leak? Idle valve? ECU?!
 

·
Registered
Joined
·
9,912 Posts
My 1.8ts 156 surges when I go into neutral after diving for a bit. It will surge from about 900 to 1200 about 3 or 4 times before settling. Could this be an air leak? Idle valve? ECU?!
depending if you got cable or fly by wire throttle ,can be gum deposits ,either you can use carb cleaner to clean ,if its fly by wire do not move flap with fingers as spring in mechanism can weaken and youll have more problems than you start with .....as for flexi tube ..take it off and inspect properly
 

·
Registered
Joined
·
100 Posts
Discussion Starter #6
Hi.
I have had a bit of wavering idle when in bad stop start traffic when coasting and coming off the throttle as mentioned in my original post but perhaps other members can advise. I have also found that if getting too near idle RPM when in top gear when I should just be thinking of changing down a cog, revs increase on their own as if it is an inbuilt reaction to stop revs going too low.
 

·
Registered
Joined
·
9,912 Posts
Hi.
I have had a bit of wavering idle when in bad stop start traffic when coasting and coming off the throttle as mentioned in my original post but perhaps other members can advise. I have also found that if getting too near idle RPM when in top gear when I should just be thinking of changing down a cog, revs increase on their own as if it is an inbuilt reaction to stop revs going too low.
don't load the engine in top gear so low down in rev range my advice for a start ,the cam belt is under the most load there because of cam gear loadings ,most belts snap at low rpm (any make of car) yes ecu is counteracting a problem so best to clean throttle plate can be sticking in gum deposits(fbw)
 

·
Registered
Joined
·
100 Posts
Discussion Starter #8
Hi.
Many thanks for that very sound advice. I will mention the throttle plate to my semi local indie who is taking car in this Wednesday if new induction pipe in by then.
Cheers:)
 
1 - 8 of 8 Posts
Top