Two Troublesome Turbo's

[GOINGtoIBITZA!]

I have a mk1 leon 1.9 90 diseasel on an 02 and a 1.9 90 Ibiza diseasel on a W reg. they both have a similar problem.
the leon (especially when accelerating in 3rd) will go all the way to about 3k revs then the turbo dies. I have to pull over and reboot the engine to get back. it also splutters under aceleration sometimes.

the Beeza is similar but a reboot doesn't solve the issue?

any ideas?
where can I get it fixed in the west mids?
anyone round here fancy running that diagnostic kit on my cars you all bang on about..?

please help. I love my oil burners but want my power back.

 

[GOINGtoIBITZA!]

I have read something on here which sounds like this problem and they said it may be to do with the MAF sensor...is that a big job?

And still trying to find a decent garage in the west mids or someone friendly with one of them Vag-com jobbies...I have beer.

 

[sssstew]

its going into limp mode. A MAF wont be the cause here. Would look at boost leak i reckon as it wont be sticky turbo vanes as the old 90 TDI in your cars will have fixed vanes.

Moved to TDI section.

 

[GOINGtoIBITZA!]

thanks for taking the time to reply. I was beginning to lose faith in this forum thought it was gonna be one of those clique's, so thanks. will get down the garage this morning and get em to have a look.

 

[GOINGtoIBITZA!]

Is it still the same reply if I add that there is no dash warnings? (presuming the bulb wasn't removed by the seller/prev owner.

 

[muddyboots]

I have had my Passat (PD130 TDI) go into limp mode before now, and that didn't show any dash warnings.

Never was sure of the exact cause, but I was tinkering with the EGR at the time; trying to plug the holes side of it, to see if the plugging material got blown out which would prove if there was air leaking out. Nothing got blown out, I just got limp mode with no dash warnings... Pulled the blu-tack, sorry - I mean plugging material - back out, and all was fine again. Never did know the exact fault the ECU was worried about. Have a feeling there wasn't even a fault code stored.

Air leaks would be a good thing to check for like Stew says. Follow the boost pipework all the way from turbo to inlet manifold, check that none of the joints have popped apart - a common problem (sometimes they can "half" pop off), and also check for any splits.

Have you seen any other symptoms - excessive smoke for instance ?

 

[GOINGtoIBITZA!]

thanks, have looked out for excessive fumes under heavy acceleration but seems clean enuff.

 

[muddyboots]

If the ECU's already aware of a fault and switches into limp mode early on, then I guess you'd be less likely to see any smoke as it's be trying to operate as safely as possible.

Needs a fault-code read off really...and hopefully the answer will be revealed.

 

[GOINGtoIBITZA!]

managed to avoid takin to the stealer, is now at the garage been tested. fingers crossed for a nice result...

 

[GOINGtoIBITZA!]

Erm, well garage have rung, can't find a fault code. they seem happy to leave it at that? has he even looked at the turbo? I mean WTF happened to real mechanics that look at things with their eyes!!! all they do is plug it into a bloody computer!

 

[Viking]

It could be the maf sensor. They have been known to generate all sorts of faults and not throw a light on the dash or leave a fault code. Then again they've been known to put a light on and hardly show any loss of performance.

But for certain you need someone to do some live logs with VCDS while driving (buggered if I know what to look for or where though).

 

[GOINGtoIBITZA!]

right went to pick it up and had a chat to them, found out they were testing it without the fault actually appearing. so, I took it for a spin, lost the turbo and went back. they plugged in again and lo and behold, two faults found.

fault 17965 turbocharger pressure control limit exceeded. (possible cause: hose connection interchanged, tc boost pressure sensor, tc wastegate regulating valve)

and fault 17563 manifold absolute pressure (MAP) sensor short to positive. (possible cause: wiring short to positive MAP sensor)

They have asked me to go to seat to get a MAP sensor as they say that is probably the cause of the other problem and should sort the lot. said it's a 20 minute job to fit the sensor, I just gotta get it. (any idea how much it would be?)

Thanks for all your help so far. loving ya work!

 

[sssstew]

yeah swap out the map, shouldnt be much and easy to do then re-assess.

 

[GOINGtoIBITZA!]

Is it just an -unplug old, plug in new- sort of job? or is it a bit more complex than that? disconnect battery etc? I believe it's located at the front on the left?

 

[muddyboots]

Should just be a case of unplugging the old sensor, fitting the new one, and plugging it back in. If it's easily accessible it should be a pretty easy job.

On my Mk4 Ibiza it was fitted on the intercooler IIRC, which meant a bumper-off job (easier & quicker than it sounds).
Where it is on yours though I'm not sure - might be easier to access!

 

[GOINGtoIBITZA!]

well I saw the black and white diagram on the mechanics pc highlighting where it was and it looked like it was at the top....it was a 2d pic however.

 

[sssstew]

yeah easy unscrew with torx bit and replace part, no need to disconnect battery. And on the old 90 in the old gen leon and ibiza its accessable from the top easily.

 

[GOINGtoIBITZA!]

£42 spent on diagnostics. Buy sensor from seat £45 spend on sensor. Come to fit it and the f**king screws are so rusted they are welded in. Managed to f*ck one of the heads and now can't get old sensor out at all. As well as that it seems vag put the sensor in the middle and built the f**kin engine around it!!! Why make a sensor that is bound to have a shelf life so ****ing impossible to get to??? Aggggghhhhh