1994 306 DT Bosch Pump Advice

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Sat 19 May 2007 19:18
1994 306 DT Bosch Pump Advice - hm
Hi all,

I'm looking at 306 DT on Flea bay very close to my house as a first car for my little brother.....it is a 1994 306 DT with a bosch pump.

Now the chap say that she smokes well, he say that the previous own tweaked the fuel pump which make her go like hell but now she smokes (I know this is a common thing as I have done it myself before)

Now, the chap says he has tried to 'reset' the pump but the car still smokes......which I find strange........

Now I know quite a bit about the DT, so I will instantly know if the turbo is leaking...but I was wondering if anyone knew an approx reset value for a DT..i.e, if you screwed everything in, the amount of approx turns to be right?

Thanks

H
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Sun 20 May 2007 00:48
1994 306 DT Bosch Pump Advice - thomp1983
they all vary from pump to pump. also if the turbo has been adjusted turning fueling done will make it go bang sooner or later. id go for fitting a new air filter, fit a boost guage, factory setting is between 12-15psi, jack the car up, put it on stands start it up then put it in 3rd and then wind the fuelling in until the smoking is gone at max boost should be ok then

chris
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Sun 20 May 2007 20:40
1994 306 DT Bosch Pump Advice - autumnboy
they all vary from pump to pump. also if the turbo has been adjusted turning
fueling done will make it go bang sooner or later. id go for fitting a
new air filter fit a boost guage factory setting is between 12-15psi jack the car
up put it on stands start it up then put it in 3rd and then
wind the fuelling in until the smoking is gone at max boost should be ok
then
chris


This won't work, because you need to test for smoke under load and you won't do this on axle stands with the wheels free.

First make sure when the engine is hot, that the cold start device is not still operating. The cable should be slack and the lever against its stop.

The normal DIY way to set the smoke levels, is to first disconnect the small turbo boost pipe on top of the pump and blank it off. (This coming from the Intercooler to the Pump.)

Then drive till the engine is normal temp, if you have a rev counter. In 4th gear, drive from 2000 rpm flat out and check for excess smoke. If you have, then adjust the fuel screw till you just get a puff. This may be seen better from someone following you.

Once sorted, reconnect the turbo pipe to the pump and do the same again, but this time from 2500 rpm when the turbo boost starts. If excess smoke, adjust the screw on the top of the pump, till again you get a puff of smoke.

But as already said, fit a new air filter first.

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