Disco 2 Sudden power loss.

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Bobdog

Bobdog

Well-Known Member
Posts
4,286
Location
Horsham West Sussex
A couple of weeks ago, I had an intercooler hose blow off, leading to sudden power loss and barely any acceleration. Obvious what the problem was when I looked, jubilee clip on the hose to intake manifold. Anyway, same thing happened today. A 'pop' then power loss. Except this time, there appears to be no loose hoses or clamps. As far as I can see (from a quick inspection in Tesco car park) no hoses are split and the intercooler seems intact.
The symptoms are as I said, a dull pop which I could feel as much as hear, then instant power loss, barely any acceleration and it won't get over about 50mph.
Any suggestions?.... (other than burn the fecking thing :mad:)
 
The hose does not need to pop off completely to lose pressure. I have been having this issue for a while, made worse by silicone hoses which do not grip as well as traditional rubber in the presence of oil. If I give the intake connection enough overlap to grip, it pops off at the intercooler.
For now I have wrapped some self-amalgamating tape around the EGR-replacement pipe to help the silicone grip the pipe, and around the hose to help the mikalor clamp grip the hose. Working for now, but long term I need to increase the overlap between the pipe and the hose and get a pipe with a better stop knurl at the end.
However, if you are certain that all hoses are good, then I suggest you get a live data diagnosis and compare the MAF output with the MAP readings. The MAP should show atmospheric pressure plus the turbo output and be around 2.2 bar with a MAF flow around 650 Kg/hr at max boost - try full throttle up a hill. If the MAP is low, but MAF normal then you are losing pressure somewhere, if both are low then the turbo may be worn.
 
Si Click said:
The hose does not need to pop off completely to lose pressure. I have been having this issue for a while, made worse by silicone hoses which do not grip as well as traditional rubber in the presence of oil. If I give the intake connection enough overlap to grip, it pops off at the intercooler.
For now I have wrapped some self-amalgamating tape around the EGR-replacement pipe to help the silicone grip the pipe, and around the hose to help the mikalor camp grip the hose. Working for now, but long term I need to increase the overlap between the pipe and the hose and get a pipe with a better stop knurl at the end.
However, if you are certain that all hoses are good, then I suggest you get a live data diagnosis and compare the MAF output with the MAP readings. The MAP should show atmospheric pressure plus the turbo output and be around 2.2 bar with a MAF flow around 650 Kg/hr at max boost - try full throttle up a hill. If the MAP but MAF normal is low then you are losing pressure somewhere, if both are low then the turbo may be worn.
Click to expand...
My MAF is dead and unplugged. I thought the hose had popped off as it did a couple of weeks ago, as it was sudden and under load. (Accelerating hard) they all seem fine after a limited inspection. Full throttle will barely get me up a hill. It's like limp mode, but worse. Can the turbo pack up mid-boost? It really felt identical to the hose incident the other week, yet all the clamps are ok and I can't find any splits.
 
Bobdog said:
And no, @neilly I still haven't got a new MAF. You've seen how many kids I've got, I can't afford one... :oops:
Click to expand...

Dont you go dragging me into this......LOL, last time i plugged the nanocom into your car , it blew the autobox up!!!....:p:p

I would suggest getting it on Diagnostics , see what faults you may have showing up.

Cheers
 
If you pull the MAF connection off the turbo you will be able to check for bearing wear on the intake compressor. Pinch the spindle and apply some movement. There should be very little side to side and pretty much nothing in and out. You can also check for witness marks on the blades to see if they have been in contact with the casing. To be sure though you need to assess the boost by looking at the MAF output.
The most likely cause of a pop though is air leaking from a hose. Sometimes the clamps are still tight and the hose can appear OK, but in fact it has been squeezed sufficiently off the pipe to allow air to escape. I suggest that you remove all 4 hoses, degrease thoroughly, check for splits and reattach. Then see if power has been restored. In my case it was, only to go pop again as soon as I increased boost.
 
neilly said:
Dont you go dragging me into this......LOL, last time i plugged the nanocom into your car , it blew the autobox up!!!....:p:p

I would suggest getting it on Diagnostics , see what faults you may have showing up.

Cheers
Click to expand...
Well, i would- if i knew someone with a nanocom.... :rolleyes: if you fancy a drive... I'm probably 5 miles closer to you now lol.
Ugh... I'm going to have to take it to "happy" Ollie (inside out 4x4), mother in laws (where we're living temporarily now) is about half a mile from his place.
 
You could try putting a shout out from anyone local who hasa nanocom / hawkeye.

Have you looked at the LZIR map to see if anyone is local?

CHeers
 
Si Click said:
If you pull the MAF connection off the turbo you will be able to check for bearing wear on the intake compressor. Pinch the spindle and apply some movement. There should be very little side to side and pretty much nothing in and out. You can also check for witness marks on the blades to see if they have been in contact with the casing. To be sure though you need to assess the boost by looking at the MAF output.
The most likely cause of a pop though is air leaking from a hose. Sometimes the clamps are still tight and the hose can appear OK, but in fact it has been squeezed sufficiently off the pipe to allow air to escape. I suggest that you remove all 4 hoses, degrease thoroughly, check for splits and reattach. Then see if power has been restored. In my case it was, only to go pop again as soon as I increased boost.
Click to expand...
The hoses are clamped on tight and no obvious splits but I suppose one could have split along the line of the clamp which may not seem obvious on visual inspection but would open up under boost. Could really do without this right now.
 
neilly said:
You could try putting a shout out from anyone local who hasa nanocom / hawkeye.

Have you looked at the LZIR map to see if anyone is local?

CHeers
Click to expand...
Did that a while back but as far as I know, there's no-one local who has one. My worry was that the turbo is dead but the consolation is that decent 2nd hand ones are going for £50-£80 on eBay. They have come way down in price from last time I looked.
 
Shimsteriom said:
Shirly someone with a Nanocom must be close enough to pop in and help out, even if you need to wait a day or so.
Click to expand...
Not as far as I'm aware. Anyway, we officially handed over the keys to our house today and we hadn't cleared everything out in time. The landlords have happily given us a few more days to finish up clearing out but I hadn't factored in the bastard disco breaking just after I left the house!!
 
Bobdog said:
Not as far as I'm aware. Anyway, we officially handed over the keys to our house today and we hadn't cleared everything out in time. The landlords have happily given us a few more days to finish up clearing out but I hadn't factored in the bastard disco breaking just after I left the house!!
Click to expand...

Have you considered hiring a van for a few days from Enterprise or similar, clear the house, and fix the Disco at your leisure?

They are surprisingly cheap if you don't pay the extra to reduce the insurance excess.
 
Turboman said:
Have you considered hiring a van for a few days from Enterprise or similar, clear the house, and fix the Disco at your leisure?

They are surprisingly cheap if you don't pay the extra to reduce the insurance excess.
Click to expand...
I hadn't up until today as we're trying to keep costs down. As it happens, the lockup place we're using do van hire, they even do it by the hour, so we might have to.
 
Bobdog said:
I hadn't up until today as we're trying to keep costs down. As it happens, the lockup place we're using do van hire, they even do it by the hour, so we might have to.
Click to expand...

Check it out, I have hired a few lately when I have had heavy stuff to move. You can get a lot more in a Transit than you can in a Disco, you don't have to worry about it breaking down, and prices are much lower than they used to be.
Sometimes less stress is worth a few quid more.
 
Turboman said:
Check it out, I have hired a few lately when I have had heavy stuff to move. You can get a lot more in a Transit than you can in a Disco, you don't have to worry about it breaking down, and prices are much lower than they used to be.
Sometimes less stress is worth a few quid more.
Click to expand...
Space hasn't been much of an issue as I've had the trailer, which has been handy. Also Trish has the zafira. However the disco being buggered takes out the trailer as well :mad:
 
Bobdog said:
Lol yeah, my little trailer which is not allowed in the tip because it's "modified" from the size of a matchbox to the size of a shoebox... jobsworths...
Click to expand...

Been there, done that! :(

In Cornwall, we applied for a permit for the trailer online. The website said max size 5' x10'. When I turned up at the tip with the 5'x10' cattle box loaded with rubbish, they freaked because it was apparently "commercial".
I made the point that I was a ratepayer, and it was my domestic rubbish, and that the trailer was commercial when I was carrying cattle, but at that time it wasn't carrying cattle.
A big row ensued, but in the end they let me tip the stuff. I never took the trailer again, though, just loaded the stuff in my car with the seats down. So long as the car had windows, it was no problem, apparently! o_O
 
Right, just been to see Ollie, 4x4 man, he can have a good look this afternoon but at a quick glance, reckons my turbo is not working. Had a look myself, removed MAF to turbo hose, and assuming the blades should spin freely with fingers and at least spin with engine running, they don't.... seized solid...
 
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