306 1.9 dt lucas Pump no power no excessive smoke?

[columbusautos]

Got a 306 that feels like it has no turbo it doesn't smoke excessively unless left on idle for a while (think thats valve stem seals as it will clear with a rev).
If you drive the car it drives fine power is definately down and you feel no turbo push as you pass 2000 rpm. NO excessive black smoke on idle you get a bit on reving (you always get something from the 1.9 dt). No evidence of smoking when driving .
So far i have checked the boost hose from the turbo upward expands when reved, air box is clear (filter changed last year) fuel filter is less then a year old and the clear pipe from filter to pump is showing no air bubbles.
I pulled the pipe off from the intercooler to pump and reved up engine there is air coming out doesn't feel like a huge amount of pressure (wish i hadn't given my boost gauge away now)
There is shed loads of oil down the back of the engine turbo looks clean though.
Gonna see if i can find a boost gauge and measure if it is boosting is 1 bar about right for one of these?
Then if not pull off the intercooler and check the turbo is spinning freely.
Anyone think of anything obvious that i haven't looked at?
cheers

[spider]

I think you may hear it if the intercooler hoses were not connected.

A bar sounds about right yes.

When I first read the topic I thought about the pipe between the fuelling device and the manifold area. If that pipe is split or open then it will be very slow indeed, it probably won't smoke either (my TD did not when that pipe came off although it was slower than a NA unit)

Something tells me at the back of my mind it is a fuel issue as I'd expect it to smoke if it was being fuelled enough but nothing else was going on ie dead turbo (but you never know). I'd start with the enrichment device on the front of the Lucas pump and check its hose carefully all the way up.

I thought about a collapsed air intake filter area (worth checking) as the filter box is silly low down on these ideal for a "drink" , although a restricted air intake usually causes an excess of smoking. A restricted fuel line could cause low power although I think you've covered that having checked the pipework. You could remove the lower pressure return line from the pump and direct it into a clean container to see how much is being returned from the pump (usual precautions)

[columbusautos]

cheers for the reply spider i am going to check the compensator pipe now as stuck a boost gauge on the intercooler at the compensator port and i'm getting 10 psi less then a bar but enough to give some performance - its more then my gt4 ran at standard. There is no whistling noises or obvious leaks.
Dopn't think its low fuel pressure cos that results in serious white smoke in my experience. But the lack of boost compensation would make sense will have check of the pipe work and report back.
Thanks again

[Peter.N.]

I to would go for the pump pressure sensor pipe, small diameter rubber about 10mm goes from the pump to the intercooler usually, increases the fueling with an increase of turbo boost pressure

Peter.

[columbusautos]

Cheers fella checked the pipe found a split near the pump end ripped it out and swapped for some comparable fuel pipe and new clips took it for a spin and its no different!
Daiphragm on the pump bushed?

[columbusautos]

Well been doing a bit of reading and found that the turbo should be boosting to about a bar which should be 15 ish psi so i have low boost.
has anyone ever tried pressuring the compensator manually to see it it increases smoke. If that works it would be an easy way to test for a poor diaphragm?
Anyone got any input?
thanks

[G4EIY]

Well, one simple method comes to mind:

1.Remove the inter-cooler end of the rubber pipe that senses the turbo pressure.
2.Fix a longer solid pipe to the open end,and make air tight.
3. Suck with your mouth, then place your tongue over the end of the pipe.
4. You can then detect any loss of pressure with your tongue.

On a Bosch pump, the diaphragm is easy to remove and inspect, but not sure how easy it is on the Lucas one.

Good Luck