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Old 06-04-2015   #16
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

It's difficult to tell properly from the video but it does sound like you have a dodgy alternator, water pump or tensioner. Sounds a bit whiney.
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Old 20-04-2015   #17
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

Well Bought the new IAC unit, 26pounds and 2weeks wasted totally! the new unit made the car run even worse, crap quality part that one from ebay link someone posted (didnt even came with a gasket! ) , Put in back old unit and the car is still drivable however the idle is still crap and jumps all overs and idles high most of the time.
The new unit made the car accelerate on its own while in gear and the idle were even worse, YIKES!

Back to square one!
Any more ideas? the Injector warning Light comes up SUPER often when idling,actually its more On than off.
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Last edited by itaa5x; 20-04-2015 at 15:57.
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Old 20-04-2015   #18
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

OK, the fact that it made things worse, is a sign you're on track!
So it has definitely something to do with the IAC valve, i.m.o.!
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Old 20-04-2015   #19
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

Quote Originally Posted by Peter Pick-Up View Post
OK, the fact that it made things worse, is a sign you're on track!
So it has definitely something to do with the IAC valve, i.m.o.!
what could be the next step now since it made difference how the car runs now to the worse? btw I did took off the battery for half a hour,and drove it for good 20km to re-calibrate it,the new unit just seems like was a total dud , could actually running it without the gasket make any difference since the new one didnt even came with one?
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Old 20-04-2015   #20
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

It needs a gasket on all times for sure.
Otherwise it will suck in extra air, making the engine run bad.
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Old 20-04-2015   #21
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

can you somehow make the gasket yourself? no way Im waiting another 2weeks till it gets here and pay another 20quid just for a piece of paper
btw The new iac valve fit on pretty straight and snug even without the gasket,tested even with carb cleaner didnt seem to leak anywhere.
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Old 20-04-2015   #22
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

If the original gasket is made of paper, and if you have the old gasket, it isn't to difficult to make a new one.
Just use new gasketpaper from a carparts shop.
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Old 23-04-2015   #23
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

Or you can just use a sealant, like a loctite or similar: http://i1.adis.ws/i/washford/122542?$pd_zoom$

Idling problems are usually caused by one or more of the following:
-Lean/rich mixture
-Broken idle valve
-Missing or incorrect RPM signal
(-Possibly a false temperature signal, but most likely not)

Most typical causes or lean mixture are leaks in the intake after the mass flow sensor (MAF), faulty MAF, low fuel pressure or faulty lambda sensor. Since your car is running ok on high rpm, most likely the fuel pressure is not the problem.

Remove and check your intake rubber one more time for leaks. The one between the MAF and idle valve. If you have a plastic intake manifold, check for cracks.
You might want to take it to a tester - if the engine light is on, there will be an error code indicating the faulty component, if the problem is component based. If not, then it's most likely an intake leak.
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Old 23-04-2015   #24
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

I can really recommend these combined with a FiatEcuScan software.
They cost less than a single diagnose in a workshop, and will help a lot.

http://www.ebay.de/itm/3-Pin-Adapter...item234de7f37a
+
http://www.ebay.de/itm/AutoDia-K410-...item25a06341d2
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Old 24-04-2015   #25
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

Just today my 95 B has developed a spookily similar problem, been stored for a few months, battery had died and I tried to jump but all I got was alarm going crazy. So today I recharged battery and hey it started and ran for a while quite happily, as soon as I moved it and introduced throttle it became very erratic , seemed to be ' hunting' up and down and the downs produced either a stall or near stall, my car despite its age has only 36k on, feels as if it would drive but I'm nervy it's going to die and with the recent battery issues it's not a good combo ! Btw the fuel was low and I only put in a few litres from a can , is this the prob and will it clear ? If not does the dreaded Variator cause these issues ? Would appreciate any help out there , thanks
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Old 24-04-2015   #26
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

I have not heard a variator cause these issues.

If the car idles ok, but stalls when you try to rev it, I would suspect an air leak in the intake rubber hose. When the engine accelerates, it moves a bit and bends the intake hose, causing any cracks to open up and suck air. whereas if the crack is small, it won't cause a leak during idle or steady revs.

Another problem might be the battery. If it's totally dead and won't take charge it might affect the injection. I understand that you were able to start the car with the battery after starting, so probably not the battery, but you might want to run the car with all other electrical devices turned off - lights, fan, radio, seat heaters etc. and see if it makes any difference.

Any problem with any of the sensors would most likely light up the injection light, so I would look for the trouble elsewhere if the injection light works alright (during startup) but is not lit.

One more thing - where did you store the car? Any chance the mice might have chewed the wiring?

EDIT: A new rubber hose may be difficult to find, but if you wash it first it can be easily fixed with Sikaflex or similar rubber glue.
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Last edited by Ilkka; 24-04-2015 at 09:51. Reason: Added tip for fixing
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Old 24-04-2015   #27
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

hmm I have checked for cracks without taking the whole hose off because of the dreaded fastening clips which are impossible to put back without proper tool and there really doesnt seems to be any..

Think its good idea just to get electric tape and tape all around the hose to see if it changes anything and detect the leak in that way if there is any?
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Old 25-04-2015   #28
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

If you want to test it without taking the hose off, you could put some piece of a plastic bag around the hose and then use duct tape to seal it.
This way you can easily remove it later.

The cracks may be underneath the pipe in the bottom corner of the bellow, so it can be difficult to see without removing. The original clamp is useless, buy a pair of hose clamps http://img.directindustry.com/images...40-2514041.jpg before disassembly, they cost a few but make things a lot easier.
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Old 26-04-2015   #29
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

Thanks guys going to have it looked at on Tuesday , the car is stored in a storage warehouse so guess mice may be present ?!
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Old 28-04-2015   #30
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Re: What could Be Wrong with my Barchetta? Stalling and hectic idle

I had the same problem with my Alfa 145 twinspark engine. Is the same engine but with 2 sparkplugs per cylinder. You, my friend, have the lambda sensor defected. Change it with NTK sensor and problem will go.
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