tore_tj

The car hasn't been very healty as some might know from one of my previous Threads. Car has stood for well over a week without running. Yesterday I couldn't even start it. So today I removed the multiplugs and soldered the wires. I also cleaned the plug to the lambdasensor and checked the plugs (what gap should I run? No mods to the engine..) took the lead off the battery for about half an hour to reset the ecu (if possible on the P8?)
The car fired straight up. Tickover just below 1k.

And NOW!! White smoke on tickover, and loads more when I give it some throttle. I didn't notice anything before. It hasn't been running atleast for the past week..

Thoughts?

JHS

iTrader: (1)

Have run it proper warm then? I bet it stops when it gets warm...

tore_tj

Venta egentli på svar fra deg haha.. Gonna try a testrun with it and see if it cures it.

tore_tj

Well now it's fine actually. That's a relief. But it it didn't cure the original problems. Comes on boost and cuts out on 4k in every gear. Even when given light throttle i.e no boost. And the oilpressure gauge has got a short somewhere now. peaks when ignition is on.

RoyP

try the amal valve, lambda sensor, and so on, even beter get a read out of all the electrics, its running in safety mode

tore_tj

ordered a bunch of sensors. going to try one after the other..

stevecossy

Hi maybe worth changing the fuel filter and checking the pressure.
Is it a small or large turbo engine? Also worth checking the timing and poss of dissy etc, try the plugs at about 0.7mm.
Good luck steve.

tore_tj

large turbo. getting some parts from msd soon so I'll wait until then.

Dave Henshall

the 4K rev limit means it IS in limp mode, and will return once the faulty sensor or fixed.

if it starts and runs but in limp it can only be 3 or 4 sensors, coolant temp, charge temp or lambda, if it were crank or phase, it wouldn't start.

the white smoke will have been steam, if the car had been warm then left outside in the cold it will have condensed a lot of water vapour in the exhaust - nothing to worry about.

AlexD

iTrader: (3)

I reckon its a Faulty ACT Sensor poss..

tore_tj

Thanks guys. Really appreciate it Got them on order now so we'll see.

tore_tj

Changed the act. it looked really bad actually.. but no difference. Do I have to reset the ecu after fitting the new sensor? Might boil down to lambda this i suppose.. doh..

tore_tj

if it helps, the car is ok for a short while when it's cold.

JHS

iTrader: (1)

So have you changed the blue water temp sensor as well?

Stu @ M Developments

iTrader: (12)

I would be looking at the lambda signal or phase sensor personally.

tore_tj

so the car can start even if the phase sensor is knackered? Can I measure the lambda in an easy way? Voltage output maybe?

tore_tj

no difference with a new coolant sensor btw. gonna try phase tomorrow. guess there is only those two left now.

tore_tj

the lambda looks very grey and rattles when shaken btw.. I'm no lambda expert but I guess that isn't good.

tore_tj

wasn't the phase sensor either. New lambda then..