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Discussion Starter #1
Hi,
I'm a newcomer to this group, having recently bought a 1993 155 2.0 8 valve skinny as you guys call them and have owned Alfas for a number of years.
Anyway, the 155 is great except for one thing. When you try to pull away in first you have to slip the clutch a little to get it to take off or else it just almost dies, then picks up. There is also a slight misfire at part or light throttle which seems more obvious when cold (kangaroo time).
The water temperature sensor has been recently replaced and I have tried cleaning the throttle position switch and checked for air leaks but all seems tight and hoses are in good nick. I'm also getting popping from the exhaust on overrun.
Plugs are new and it's a cat-equipped car (lambda probe prob poss?).
I tried doing a search for similar problems but the only two I could find ended without the original poster reporting if the problem had been solved (a bit like reading a book with the last page torn out).
So I apologise if this is a boring old chestnut for some of you guys, but I'd like to try and solve the problem before I take it to my local Alfa specialist.
TIA
Rob
 

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Welcome Rob.

My personal favourite (Oh no, they all groan....). Dirty/broken/blown fuse & /or relay for lambda heater. Middle of the engine bulkhead, small group of 3 relays/fuses (sometimes under a plastic cover). It's the 7.5A chap.

Plenty of other causes but start with the quick, simple & cheap stuff first.

Good luck...
 
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Discussion Starter #3
ChrisS said:
Welcome Rob.

My personal favourite (Oh no, they all groan....). Dirty/broken/blown fuse & /or relay for lambda heater. Middle of the engine bulkhead, small group of 3 relays/fuses (sometimes under a plastic cover). It's the 7.5A chap.

Plenty of other causes but start with the quick, simple & cheap stuff first.

Good luck...

Thanks Chris. I'll give that a shot this weekend and report back.
Rob
 
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Discussion Starter #4
Hi Rob
popping in the exhaust...are you sure there isn't a little hole somewhere ??
Have you replaced/cleaned the air filter ???

My car used to do the same. It was barely noticeable after doing the plugs and leads, but you've done them already.

What is your fuel consumption like ??? Maybe this could be a clue.......
 
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Discussion Starter #5
Hi Marlon,
I haven't had the car long enough to be able to do a meaningful consumption breakdown - I've only been commuting 10 miles each way every day in mixed driving - but it doesn't seem much worse than my old 75 TS.
It has a K&N filter (new) and the previous owner had a stainless steel exhaust (Powerflow) from the cat back fitted in February.
Cheers
Rob
 
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Discussion Starter #6
rob r said:
Thanks Chris. I'll give that a shot this weekend and report back.
Rob
Hi Chris,
Had time this evening to try out the fuse and relay thing - the contacts were a bit corroded so I cleaned them up and sprayed with contact cleaner, but it's still no different. I even swapped the relay and fuse...
Cheers
Rob
 

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Could be the plug leads or poss corroded contacts on the relays that supply the power to the coils................there just behind them below the AFM

Or it could be the AFM

And just for Chris ............................Groan Groan Groan :p :p :p
 

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well, if its holding back and popping, id say it is definatly the Lmbda sensor for sure 100% doesnt hurt to fit a new one anyhow.

Regards,

AO

BTW - Welcome to this site
 
G

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Discussion Starter #9
Gotta agree, sounds like AFM or Lambda.....usual suspects :D

...........and a biiiiiig welcome, hope you stick around ;)

wrinx
 

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definitely the lambda. to confirm this, when you start the car in the morning (or any cold start), let the the car idle for a few minutes (3-5 mins). drive the car after that and if you don't encounter the problems anymore, change the lambda.
i've had similar symptoms some time back and wasted a lot of time (like 6 months) to figure out what went wrong.
 
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Discussion Starter #11
bob0962 said:
definitely the lambda. to confirm this, when you start the car in the morning (or any cold start), let the the car idle for a few minutes (3-5 mins). drive the car after that and if you don't encounter the problems anymore, change the lambda.
i've had similar symptoms some time back and wasted a lot of time (like 6 months) to figure out what went wrong.
Thanks everyone for your rapid input. The Lambda certainly seems favourite at this point so I'll set to it, along with the AFM.
I'll keep you posted on my progress and the conclusion (usually tears and empty pockets with Alfas, HA!)
Thanks again.
Rob
 

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Symptoms sound very similar to ones I've just had on my 8valve, mine idled smoothly but you had to slip the clutch to move off in order to avoid Kangarooing, then was ok with plenty of right foot. Took it to Peak Alfa, and he found the big diameter hose after the airflow metre was split around one of the flexi parts, just run the engine and put some pressure on the hose caused the engine to almost stall. When setting off the engine moving on its mounts was causing the split to open up and let unmetered air into the system. Part cost around £30.
 

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rob r said:
Hi Chris,
Had time this evening to try out the fuse and relay thing - the contacts were a bit corroded so I cleaned them up and sprayed with contact cleaner, but it's still no different. I even swapped the relay and fuse...
Cheers
Rob
Ah well, can't win 'em all :)

Plenty more good ideas to try so far though.
 
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Discussion Starter #15
Hi All,
I seem to have cracked the problem. I was checking the general condition of the all the electrical connections in the engine bay when I came across this interesting configuration below.
This,of course, is the wiring to/from the Lambda probe. The connectors were a bit corroded so I cleaned them up and hey presto, I've got a flying machine. So we were down the right road with the Lambda after all.
However, I took it for a celebratory blast down the local dual carriageway and was surprised by the odour of rotten eggs (the cat) as I had the window open. Is this normal?
The difference in throttle response was pretty significant - it previously :D felt like the power was being strangled.
Anyway, thanks for all your input - I shouldn't speak too soon, but I love cheap solutions to these kind of problems...
Cheers
Rob
 
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Discussion Starter #16
Glad you got it sorted......the rotten eggs (sulphur) smell is normal, a by-product of the catalysation process :D

wrinx
 

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wrinx said:
Glad you got it sorted......the rotten eggs (sulphur) smell is normal, a by-product of the catalysation process :D

wrinx

Is that what yer call it now :rolleyes: :rolleyes: Up our way its known as Farting :p :p :cheese: :cheese: :cheese: :cheese:
 

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rob r said:
Hi All,
I seem to have cracked the problem. I was checking the general condition of the all the electrical connections in the engine bay when I came across this interesting configuration below.
This,of course, is the wiring to/from the Lambda probe. The connectors were a bit corroded so I cleaned them up and hey presto, I've got a flying machine. So we were down the right road with the Lambda after all.
However, I took it for a celebratory blast down the local dual carriageway and was surprised by the odour of rotten eggs (the cat) as I had the window open. Is this normal?
The difference in throttle response was pretty significant - it previously :D felt like the power was being strangled.
Anyway, thanks for all your input - I shouldn't speak too soon, but I love cheap solutions to these kind of problems...
Cheers
Rob
Nice one Rob....

....and can I just say 'I told you so' :)

But seriously, this is a perfect example of my new motto - look for the simple things first.
 
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