Diabolical running issues

[jasond1989]

Hi all,

I have a Uk2000 turbo, i have not long owned this vehicle but thought i had a decent runner until things started going down hill.

I had to replace the turbo with another td04 because of a lot of play, I have cleaned the throttle position sensor and the one above it (plunger type) as well as replaced the knock sensor - all was running ok.

I took it for a spin and noticed its still hesitating from 2000rpm up to 3000rpm - after that its fine, i returned to mates garage and left the car for a few hours and then drive home, its got worse, the car is running lumpy to the point of cutting out the idle is all over the place and there is a nasty burny smell coming from the exhaust - I am stumped as well as my mate too, if anyone could shed some light on this it would be much appreciated.

[Buggyeye]

Leftover oil in the exhaust for the smell? As for the running issues it could be made sensor?

[Scoobyghost]

Check for air leaks after the maf. That could explain lumpy running.

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[jasond1989]

i've had a replacement inlet pipe put on last week, i originally thought it was fuel starvation or along the lines of spark plugs failing between 2k-3krpm until an awful 5 minute drive home without boost started

[stants]

Was an ecu re set done after changing the sensors ?

The tps and knock sensor have to go back in at exactly the same position as they come out, otherwise it will run crap,

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[jasond1989]

update

after using the cars built in obd here are the codes as follows:

22 Knock Sensor 
23 Mass air flow sensor 
31 Throttle position sensor 
45 Map sensor 
24 Idle air control sensor (usually companied by running too fast/Slow)

32 O2 Sensor

i can only assume the knock sensor is coming up as its detected poor running, 

[Buggyeye]

What fuel you running it on out of interest? 

[jasond1989]

i am using Shell v-power

[Scoobyghost]

Clear those codes and let it log any new ones. Some vital sensors showing errors there.

[jasond1989]

whats the best way to clear them? does removing the Battery terminal reset them?

[Scoobyghost]

You can remove the negative for a while or there is a longer version. There is a guide in the forum somewhere showing how to do it.

[jasond1989]

i removed the negative wire, I took the car out for a drive and it all started playing up again, kangarooing between 2k-3k, there is no pipes split, the boost solenoid has been cleaned out, the idle sensor above the throttle position sensor was also cleaned out with carb cleaner