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Old 02-07-2019   #1
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Abarth with performance issues..Can't figure it out.

Hi all!,

I'm the proud owner of a Stilo Abarth 2.4 since january this year. After some other issues with the Selespeed and other services doen, I'm having performance problems. The car feels sluggish, struggling to pick up power. Can't really describe it properly. But when a Vw Polo 1.2ish or so can outrun you, you know something is wrong haha.

I already posted this issue on a Stilo Forum in the Netherlands, but nobody seems to know what it could be. So I found your forum in the hopes maybe you guys know the answer to this nightmare.

What I already did.. Changed spark plugs (twice), Air filter, cleaned throttle body, Cleaned Maf, Checked & cleaned most of the connectors..

I also have MultiECUscan wich occasionally throws up a fault. Recently it was the pre-cat Lambda. Changed it, and now the same error came up again. Erased it and it didn't came back tillen now.

And then there's another thing. When I stop (like a junction) the cars revs drop to 0 and stuggles to keep itself going. Then it quickly recovers to 500Rpm and eventually to 700/800ish. But not all the time! This car is really a mystery to me.

If you know something what could be the problem. Please help haha.

Thanks!

Robert
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Old 02-07-2019   #2
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Re: Abarth with performance issues..Can't figure it out.

Quote Originally Posted by RobertV1991 View Post
Hi all!,

I'm the proud owner of a Stilo Abarth 2.4 since january this year. After some other issues with the Selespeed and other services doen, I'm having performance problems. The car feels sluggish, struggling to pick up power. Can't really describe it properly. But when a Vw Polo 1.2ish or so can outrun you, you know something is wrong haha.

I already posted this issue on a Stilo Forum in the Netherlands, but nobody seems to know what it could be. So I found your forum in the hopes maybe you guys know the answer to this nightmare.

What I already did.. Changed spark plugs (twice), Air filter, cleaned throttle body, Cleaned Maf, Checked & cleaned most of the connectors..

I also have MultiECUscan wich occasionally throws up a fault. Recently it was the pre-cat Lambda. Changed it, and now the same error came up again. Erased it and it didn't came back tillen now.

And then there's another thing. When I stop (like a junction) the cars revs drop to 0 and stuggles to keep itself going. Then it quickly recovers to 500Rpm and eventually to 700/800ish. But not all the time! This car is really a mystery to me.

If you know something what could be the problem. Please help haha.

Thanks!

Robert
sounds like a timing problem, did you changed the timing belt?
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Old 02-07-2019   #3
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Re: Abarth with performance issues..Can't figure it out.

Hi Kokkolin,

It was recently changed by a Italian car specialist. But the lack of performance was already there before it was changed. It's strange that it changes slightly. Sometimes some power, other times really bad.
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Old 03-07-2019   #4
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Re: Abarth with performance issues..Can't figure it out.

If the car is rolling along at a normal revs and you put your foot down enough to give it a shove (not necessarily all the way to the floor) does it respond immediately, or is it lethargic? If you accelerate slowly slowly... is it smoother?

If it runs okay when "slowly slowly" but doesn't want to know if you boot it, then it may be that your fuel pump is not delivering enough gas, or the regulator may be weak. Check the fuel pressure at the fuel rail to see what that says, then work backwards from there.

Weak delivery might be the fuel pump. They can have a rubber fuel line that carries the fuel to the top of the pump, rather than a metal pipe... and the rubber can perish and split... so your pump is lifting the gas up this tube but if the tube is leaking, a lot of the fuel just leaves through the split in the pipe rather than reaching the fuel lines.

You can replace the tube but it has to be a special "in-tank" capable rubber(?) pipe. A normal rubber pipe (i.e. even a normal rubber fuel injection pipe) won't work.. since the rubber will rot from whichever side is not protected against petrol. It has to be an "in tank" capable pipe.... which I guess is not actually rubber.

Anyhow... check fuel. If fuel is good then it has to be sparks.


Ralf S.
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Old 03-07-2019   #5
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Quote Originally Posted by Ralf S. View Post
If the car is rolling along at a normal revs and you put your foot down enough to give it a shove (not necessarily all the way to the floor) does it respond immediately, or is it lethargic? If you accelerate slowly slowly... is it smoother?

If it runs okay when "slowly slowly" but doesn't want to know if you boot it, then it may be that your fuel pump is not delivering enough gas, or the regulator may be weak. Check the fuel pressure at the fuel rail to see what that says, then work backwards from there.

Weak delivery might be the fuel pump. They can have a rubber fuel line that carries the fuel to the top of the pump, rather than a metal pipe... and the rubber can perish and split... so your pump is lifting the gas up this tube but if the tube is leaking, a lot of the fuel just leaves through the split in the pipe rather than reaching the fuel lines.

You can replace the tube but it has to be a special "in-tank" capable rubber(?) pipe. A normal rubber pipe (i.e. even a normal rubber fuel injection pipe) won't work.. since the rubber will rot from whichever side is not protected against petrol. It has to be an "in tank" capable pipe.... which I guess is not actually rubber.

Anyhow... check fuel. If fuel is good then it has to be sparks.


Ralf S.
Hi Ralf,

Thanks for the input The reaction time of the car is good. If I floor it at mid revs, it will accelerate gradually, but it takes too long! The Rpm are consistent with speed so the clutch is not slipping.

As for the Fuelpressure. To check it I need to use the adapter on the right side of the rails (when you're in front of the car)? And do I need some special tools for that? Maybe I will take it to a specialist to check that for me.

I also noticed my exhaust tip is blackened. I know a little blackening is normal, but I've never seen it this much.

Sorry for my English by the way, It's a bit rusty haha.

Thanks!
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Old 03-07-2019   #6
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Re: Abarth with performance issues..Can't figure it out.

Possibly check the air intake,
Like the manifold, airbox filter, double check the MAF sensor also
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Old 03-07-2019   #7
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Re: Abarth with performance issues..Can't figure it out.

Also the throttle body
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Old 03-07-2019   #8
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Hi

I am Marin from Croatia. I have near the same problem. My Abarth have 158.000km. Previous owner put inside 5w-40 oil but I changed to selenia racing 10w-60 because it consumes 1L/1000km od oil. I live in warm part of country so original spec oil is good. My exaust pipe very soon become dark. With new oil consuption is lower. Unstable iddle is stil present. It drops to 500 rpm and return to 700-800. I cleaned intake and maf sensor but only kangarooing is much lower. When I drive it than everything if fine, eco test is superb, trottle response is relative good but I have constant feeling when I push it harder than "someone outside" push my car backwards. 170hp on 1300kg must be better than this. I have spare engine with gearbox and if something goes wrong I have backup.
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Old 03-07-2019   #9
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Quote Originally Posted by llamallama View Post
Possibly check the air intake,
Like the manifold, airbox filter, double check the MAF sensor also
Checked al that, changed filter recently and everything is triple checked. Too bad the System is not throwing up fault codes, at least then I know what to look for..
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Old 03-07-2019   #10
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Quote Originally Posted by llamallama View Post
Also the throttle body
Cleaned it twice, parameters on MES are correct to my knowledge.. Maybe the Cat?
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Old 03-07-2019   #11
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Quote Originally Posted by mdrazic View Post
Hi

I am Marin from Croatia. I have near the same problem. My Abarth have 158.000km. Previous owner put inside 5w-40 oil but I changed to selenia racing 10w-60 because it consumes 1L/1000km od oil. I live in warm part of country so original spec oil is good. My exaust pipe very soon become dark. With new oil consuption is lower. Unstable iddle is stil present. It drops to 500 rpm and return to 700-800. I cleaned intake and maf sensor but only kangarooing is much lower. When I drive it than everything if fine, eco test is superb, trottle response is relative good but I have constant feeling when I push it harder than "someone outside" push my car backwards. 170hp on 1300kg must be better than this. I have spare engine with gearbox and if something goes wrong I have backup.
Same here mdrazic! I hope we can figure this out! Today I called some local garages if they can perform an emmision test. Hopefully something comes up
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Old 04-07-2019   #12
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Re: Abarth with performance issues..Can't figure it out.

I had a similar problem and it turned out to be clogged injectors. Some shop can clean then with some ultrasonic equipment and then messure the amount of fuel the spray per minute and that way asure its working properly again.
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Old 04-07-2019   #13
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Re: Abarth with performance issues..Can't figure it out.

A lot of soot in the exhaust could be the injectors, which is also related to "fuelling problem" (my first thought).

If your fuel rail pressure is good (you need to have the correct measuring equipment and know how to use it, so I would give this quite simple job to a garage to do) then have a look at the injectors. There are places that can do ultrasonic cleaning.. they'll tell you the "before" and "after" readings... and if the injector is worn out, they can tell you that too (and may be able to rebuild them).

What kind of mpg does the beast do, compared to what Fiat says? You should get fairly close to the Fiat consumption figures.

Meanwhile.. you can try an injector cleaning product in your fuel tank... Cheapest one to find is kerosene/paraffin ... but if you can get your hands on Propanol, acetone and toluene grab those too. Make yourself some injector cleaner using the kerosene (60%), Propanol (20%) and acetone/toluene (10% each). You need about a litre of it.

If you only have kerosene, use 100% kerosene. If you have kerosene but only 1 or 2 of the others but not all of them, use kerosene instead of the missing one(s).

Stick 300ml of your home-made cleaner into a full tank of petrol and just drive the car normally. The cleaner may or may not be able to dissolve any blockages but you have every solvent known to man that won't wreck the engine in there, so it's worth a try.


Ralf S.
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Old 05-07-2019   #14
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Quote Originally Posted by astacheva View Post
I had a similar problem and it turned out to be clogged injectors. Some shop can clean then with some ultrasonic equipment and then messure the amount of fuel the spray per minute and that way asure its working properly again.
Yes I've thought about that too. I used some injector cleaners (Wynns) multiple times but no difference. But still, maybe it's not strong enough to clean them 100%. The car is going to a diagnostic center the 15th of july. Maybe they can sort it out.
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Old 05-07-2019   #15
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Quote Originally Posted by Ralf S. View Post
A lot of soot in the exhaust could be the injectors, which is also related to "fuelling problem" (my first thought).

If your fuel rail pressure is good (you need to have the correct measuring equipment and know how to use it, so I would give this quite simple job to a garage to do) then have a look at the injectors. There are places that can do ultrasonic cleaning.. they'll tell you the "before" and "after" readings... and if the injector is worn out, they can tell you that too (and may be able to rebuild them).

What kind of mpg does the beast do, compared to what Fiat says? You should get fairly close to the Fiat consumption figures.

Meanwhile.. you can try an injector cleaning product in your fuel tank... Cheapest one to find is kerosene/paraffin ... but if you can get your hands on Propanol, acetone and toluene grab those too. Make yourself some injector cleaner using the kerosene (60%), Propanol (20%) and acetone/toluene (10% each). You need about a litre of it.

If you only have kerosene, use 100% kerosene. If you have kerosene but only 1 or 2 of the others but not all of them, use kerosene instead of the missing one(s).

Stick 300ml of your home-made cleaner into a full tank of petrol and just drive the car normally. The cleaner may or may not be able to dissolve any blockages but you have every solvent known to man that won't wreck the engine in there, so it's worth a try.


Ralf S.
I'll try to make that recipe soon, but not having the proper equipment I can't check the rest. I'm taking the Abarth to a car diagnose center the 15th of july. They are experts in wel.. Diagnoses haha. Maybe they can track down the issues. Will let you know soon!
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