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Technical My Cento Sporting Abarth Stalling Issue

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Technical My Cento Sporting Abarth Stalling Issue

You know where the door is.

It may be completely unconnected to the HG issue. So what?

Can you offer any explanation for a high idle apart from excess air? If you can, myself and a whole community of folk who've been working on FI systems for much longer than you've been on the planet would love to hear it.

But I wouldn't give that much credence to the opinions of someone who can't be arsed to read a manual.
 
well since im an idiot as you say, dont expect any info again! we are all here to help each other not have a go at people for trying to help. there is obviously something you havnt checked hence why its still revving.

i no i said i wasnt going to help but im not like that, have you checked the pipes going to the servo for the brakes? have you got another tb that you can try? is the anything stopping the butterfly from closing properlly?

and like i said people are only trying to help, you cant ask for help then have a go for people trying.
 
FuzzyLoveSpud said:
Wow I've bought a car with a forum community of idiots. I am mechanically minded and my dad is a mechanic. I attend car cruises shows and events I'm not just some random guy who's bought a cento and knows nothing about cars. I have just done a full head gasket set on this perfectly. Now it was revving high before and it's revving high now. There are no leaks going anywhere into the intake. I've double checked and triple checked. I've read the guides, made sure everything is in the right place, and checked and checked again.
Click to expand...

So if you're so clever and mechanically minded why have you not managed to fix it.. slagging off the people trying to help you, yeah your really clever.

:wave: bye then
 
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FuzzyLoveSpud said:
I attend car cruises....
Click to expand...

And we're idiots :confused: :chin:

I was kind of thinking a servo leak as has already been suggested but the reality is trying to resolve an issue over the internet is far more difficult.
I'm sure most of the chaps on here could of resolved this in minutes with a bit of hands on diagnosis but since your dad is a mechanic and you're much cleverer than us idiots I guess you don't need anyone to have a look for you...

Maybe you should by a Saxo if you find repairing Fiats a little difficult.
 
ah, yeah, that makes sense.

and indeed disturbance in the air system does affect idle and rev stability,i experienced different kinds of it in the past few months from squeeking pipe to blown one, and even had issues with a silicone hoses that got soft from heat and collapsed under vacuum..:D
 
Apologies for my previous outburst. I had a crappy day. Currently the car is reving up to 2k and dropping to 1k whilst idling. Over and over again. Ive got work in an hour but Im going to strip the intake down and have a quick look around. I haven't had chance to get a real look at it yet but fuel consumption is bugging me now.

When i slightly pull the pipe from the servo to the manifold i can hear air leaking from the servo. Could that be the issue?
 
what would i be lookin at doing then? New servo? Im assuming the current one is pumping air into the mani causing it to over rev? Would blocking the servo to mani pipe work as a temporary fix?
 
well i had this problem when the vacuum pipe from the back of the throttle body to the airbox went fubar all of a sudden. i went with blocking it but a later time i just fixed it with a tough silicone hose.
with the brake assistant servo i wouldnt go disabling it nor replacing with rubber, but would use a plastic pipe. heat and bend till its okay or cut it and put a small rubber hose to allow it flexing while fixing it in place propely.

when my pipe from mani to brake servo was squeeking my rev _dropped_ not raised, but with a gentle push i managed to put the ends in place and is okay since then, but when it goes, i'm gonna replace it the way mentioned above.
 
mine doesn't squeak but when i pull it a little i can hear air leaking from the part where it connects to the servo. The pipe and filter seem to work fine. Lets air out the servo but not in. Im currently short on money so i need a quick fix really..

With a custom intake like k&n would i need to block that pipe from the intake to airbox anyway?
 
Hang on. Before we go any further:

The pipe to the servo is a vacuum pipe. It runs from the inlet manifold to the brake servo. The thing where is fits to the servo is a one-way valve.

If everything is working correctly, there is a vacuum in the pipe when the engine is running. The one way valve ensures that air cannot enter the servo (at least, under normal running).

An air leak on the engine side of the one way valve will result in fast idle. An air leak on the servo side of the valve will probably result in you needeing to push a lot harder on the brake pedal.

A good factor, or somewhere like Car Builder Solutions, will sell you the right hose. It's vacuum hose -- nothing else will do.

I've no idea what the pipe from inlet to airbox you're talking about is, and you're starting to scare me if it has anything to do with the pipe to the servo. Pics please.

Don't fit anything by K&N. Very little they make for this car really fits.
 
well similar to k&n. There's a breather pipe on the bottom of the airbox that goes to the back of the throttle body. Ive noticed that with other intakes/airboxes that they have no use for it.

I have to press hard on my brakes as it is. They're not sharp at all, even with new pads.

I'll try and get some pics up later of what i mean. But i think the servo is pushing air into the manifold at the moment causing this problem.

I spend my life working or with the gf and never get time to check these things properly.
 
make ur gf understand that she cant get you 100% with the car in your mind. she should accept it and see it as a benefit for both of you if she lets you finish with the car!:D
 
gyugyujol said:
make ur gf understand that she cant get you 100% with the car in your mind. she should accept it and see it as a benefit for both of you if she lets you finish with the car!:D
Click to expand...

Very true. Ill have words with her lol.
 
I've narrowed the problem down guys.. It seems to be the MAP Sensor. When I disconnect it, the car revs normally. How easy are they to replace? Can they be fixed? and what's the cost of one for a cento?
 
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