2002 Td4 Like 500cc Motorcycle

Dear all,

I just bought 02 td4 fl 1 week ago. I had a problem with power. I went to local private service yesterday and they said need to replace turbo

I do not want to beleive them, Because i made some test myself manually. First of all, when i press to gas engine does not give any grey or black smoke behind. So probaly turbo is working. But i checked turbo pipes (which i changed 3 days ago) I am squeeze pipes with my hand and giving gas to engine, can not fell any pressure.

I need your ideas about this problem.

Best Regards,

HY

A turbo will only really generate positive pressure/boost when under load. It wont create any pressure on tickover. You need to use a pressure gauge on the road and see what it is reading.
I am no expert but have had a few turbo cars (diesel and petrol) and I have had a turbo go on a petrol car. When a turbo normally goes they go in one of 2 ways. 1 is the oil seals go and when you decelerate you get blue smoke out of exhaust, as the closed throttle causes a vacuum and pistons suck oil out of turbo. Method 2 is when the bearings fail and the turbine shaft isnt supported properly and the turbine and compressor wheels hit the internal casings and disintegrate.
Both the above are the main failure modes but there are others.

But a few things to check first.
1. check all air inlet hoses for leaks. The left hand top hose from intercooler can rub on a screw and produce a leak. This cant be seen as its on the bottom of the pipe. So check all hoses very carefully.
2. Check all vacuum hoses and small hoses around the engine.

One thing as just crossed my mind. Is it lacking power low down or very poor throttle response? If so it could be the MAF (mass air flowmeter) this tells the control unit how much air is entering the engine. These are a common problem and arent that cheap (£150 maybe more) A slightly more expensive fix for MAF faults is a 'Rover Ron' control box and cheaper MAF. This has an advantage of increasing the td4 power by about 30bhp!!

Can you describe the actual symptom? Be as specific as you can. Is it from trying to pull away, at all speeds, at high throttle positions, just when cold.

Other thing that could be causing it is low fuel pressure. The tank mounted pumps can fail, and filters can clog.

I take it it wasn't purchased from a garage?

ched999uk said:

But a few things to check first.
1. check all air inlet hoses for leaks. The left hand top hose from intercooler can rub on a screw and produce a leak. This cant be seen as its on the bottom of the pipe. So check all hoses very carefully.
2. Check all vacuum hoses and small hoses around the engine.

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To avoid this I checked all the pipes/hoses and where I saw something rubbing against something else, I put a piece of gardenhose, cut in length, over it as protection against the rubbing. Including the left hand top hose which can rub on that support of the airinlet. All this is already described in one of the older posts on the forum here, with pics. included even.

ello willo, ow are yer mate

yella said:

ello willo, ow are yer mate

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Hi yella,
Doing fine, thank you, and yourself ? All ok I hope ?

aye not bad mate, i was over your waters last month, i would have dropped in and seen yer but yer never gave me yer address

yella said:

aye not bad mate, i was over your waters last month, i would have dropped in and seen yer but yer never gave me yer address

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I was waiting at the border to give you a continental welcome. Must have missed you......