Technical Turbo/MAP/EGR/lag/engine issue

[radddogg]

Hi


I've used the search and found some parts that partially relate to my problem but nothing concrete so hoping you can help.


I picked up a 57 1.3 multijet GP on Friday. It has a whirring bearing type noise on medium to hard acceleration and overrun, boost doesn't come in until 2500rpm and if I floor it up to 4000rpm it goes into limp home mode and won't rev past 3500rpm and is extremely sluggish. If I cycle the ignition the limp mode disappears.


There is no EML but I did recover an engine code for overboost.


I have no idea of the history so I'll be starting off with a full service and cleaning MAP and EGR but can anyone shed any light on what the root cause could be? Also any ideas on the whirring bearing noise?


Thanks


Radddogg

 

[radddogg]

Oh and I forgot to mention that the odometer is flowing so I guess it needs a proximity alignment. Do fiat charge for this?

 

[ChrisUK]

Yes fiat will charge for that. But it can be done yourself using a Laptop, a copy of "MultiECUScan" (google it) and a set of adapters off eBay.

As for the performance. All I can suggest is if your currently plans dont make it any better I'd hazard a guess that it's the Turbo itself that's broken, perhaps clogged up with carbon if it's a VGT / VNT turbine.

 

[radddogg]

Re: Turbo/MAP/EGR/lag/engine issue - ##Fixed##

I found the problem - seized wastegate actuator. I've not been out yet to test the difference and whether the noise has gone.

 

[radddogg]

well it certainly pulls much better now. The only problems now are that it starts shaking if I let the revs drop below 1500 and try to accelerate and the second really is a whirring noise that accompanies medium to hard acceleration and briefly on overrun. I think this is possibly turbo related but open to suggestions from anyone with experience of the same symptoms.

 

[ChrisUK]

If it's a VGT turbo and the actuator is stuck it's probably the vanes sticking from carbon build up.

 

[radddogg]

If it's a VGT turbo and the actuator is stuck it's probably the vanes sticking from carbon build up.

Well its a 75bhp so I believe that means its a non-VGT.


I guess I just need to get the cold side pipe of and give the shaft a good tug oo-err