General Car cuts out-help

[TurboSei]

Okay driving a turbo seicento at the moment and every so often when driving along the car sounds like it's about to stall.

Will be in the correct gear for whatever speed I'm going at and then it'll have no power. For instance driving up a hill in third gear when it starts sound like it would if I had put it into fifth. Changed down, same problem. Had pretty much ground to to a halt by the time it start working normally again.

It's not just when the car is under stress, happened on a flat road at 50mph when in 4th gear as well.

Any ideas as to what this could be?

 

[arc]

is it doing on or off boost. do you have any warning lights come on. my first thought is faulty map sensor - but would need more info to diagnose. Does it do it at full or partial throttle, any smoke when it does it? Do you have a boost gauge, what does that read when it does this?

 

[GhostWKD]

also need to know the turbo setup etc if its on boost

 

[TurboSei]

No smoke and no warning lights. It's litterally just like I'm in the wrong gear. which I'm not. The exhaust blows quite badly at the manifold but I don't think that would cause it. And the dump valve doesn't always work properly.

Does that help?

 

[GhostWKD]

do you have any problems when only partial throttle and off boost? or does it still have problems then?

sounds like something a bit more than a faulty sensor to be honest

 

[arc]

who did the turbo conversion? is it doing anything else weird? with these you do need to keep on top of any problems and the blowing manifold / turbo join should really be sorted.

What is your fuel consumption like, has it changed since this started happening. An engine 'bogging down' like you describe is often due to a massive fueling cock-up. Be it over or under fuel. I saw a few of them when setting my car up, but i could see what the fueling was doing when it was acting up.

Do you have an AFR gauge?

edit: Get Jamie to fix it

 

[TurboSei]

who did the turbo conversion? is it doing anything else weird? with these you do need to keep on top of any problems and the blowing manifold / turbo join should really be sorted.

What is your fuel consumption like, has it changed since this started happening. An engine 'bogging down' like you describe is often due to a massive fueling cock-up. Be it over or under fuel. I saw a few of them when setting my car up, but i could see what the fueling was doing when it was acting up.

Do you have an AFR gauge?

edit: Get Jamie to fix it

Jamie shouts when I say there is a problem with the car

I took it out just now and it did the lag thing at -3 on the gauge. When fully on boost it goes up to about 8. When my foot isn't on the accelerator its at -10 It was fine for the rest of the journey. The car was cold at that point so I was avoiding going on boost so does that mean its not the turbo? I though the turbo only works when you accelerate hard or over 3000revs... Confusing.

Will see what happens when I go back to the parts shop. Remembered the old alternator this time but not the card the refund will be on. Gah. Last time I forgot the actual part

 

[blu73]

symptoms do rather sound like fuelling but to be honest if your manifold is blowing then there quite a good chance the car is misfiring a bit which could cause the same problems. Whatever, get the manifold fixed asap and see what happens, if that does nothing to help then theres something more sinister going on. After that i'd check fuel pressures though anyway just for peace of mind. having read your last post sounds bang on what the grey turbo did when i got it off jamie.. that was under-fueling

 

[TurboSei]

symptoms do rather sound like fuelling but to be honest if your manifold is blowing then there quite a good chance the car is misfiring a bit which could cause the same problems. Whatever, get the manifold fixed asap and see what happens, if that does nothing to help then theres something more sinister going on. After that i'd check fuel pressures though anyway just for peace of mind. having read your last post sounds bang on what the grey turbo did when i got it off jamie.. that was under-fueling

Thanks yeah fuelling had crossed my mind.... Was constantly watching the petrol gauge to check it wasn't just that I'd run out!!!

 

[jamie86]

She knows nothing

Fuelling is bob on the car was cold at the time so obviously a bit hesitant..

Need to teach her about cars :idea:

Chris- no this one isn't leaking lol

Car really needs to have the manifold whipped off and taking to engineering shop to get it all flattened nicely if K will actually drive the 205 long enough for me to take the thing apart

 

[fingers99]

The flatting you can do yourself with a peice of glass and valve cutting paste. More important, though, is to get the back face of the turbo machined so that the place where the nuts sit is parralell to the mating face. If that isn't done you'll loose the seal (however good it is cold) as the bolts heat up and bend. The original design had studs in the turbo, IIRC, so the back face didn't matter.

Aaron will explain it better....................

 

[J333EVO]

He knows already what needs done, I got manifold and turbo faces machined to ensure flat because once the y blow it takes loads off, i had to get near 2mm machined off manifold to get it flat again!

We managed to flatten back of turbo face with a grinder on bench as its not far from flat, but enough to bend the studs over time.

 

[jamie86]

Yeah that... just couldn't be arsed typing it all

 

[TurboSei]

Amazing. Post up on the forum what needs looking at on the car and its fixed that evening. Can shout at him in person til I'm blue in the face but nothing registers. Hmmm :chin:

...the car also needs a good wash

*eagerly awaits response* :devil: