scoobyJim2

Not sure on figures,it might just go up & down correcting itself. Shouldn't have run it for hr on that oil really,well I wouldn't have mate. All the best with it,let us know

KainUK

Well I'm oficially getting pissed off now

Dropped oil on Friday, fitted new lambda on sat morning, drove about 50 miles yesterday without fail.
Went to pick the mrs up from work this morning drove back home reversed onto drive and it started misfiring and again fuel pumping out of exhaust manifold same as before (where the manifold meets the bottom of block)

swaynie

iTrader: (6)

On your ecu checker can you see any injectors that are staying open longer or has a different duty cycle. Have you checked to make sure you cat isn't blocked

KainUK

Not sure if ecuexplorer has that facility but I will check, not checked if cats block but that's going to be my next job

Cheers
Chris

ALi-B

iTrader: (1)

Right; ruling out mechnanical faults with teh injectors and coilpacks etc. Such as a physically stuck open or leaking, the only other problem is electrical/electronic. Also bear in mind a dead coil pack (or dead wiring to it) will show flooding/fouling and unurnt fuel in the exhaust, as can a sticky valve (see my thread with a Fiat with a screw stuck in the inlet valve ).

Anyway, back to basics :

Injectors always have a 12v live supply. They are open and closed by the engine ECU switching the earth. So a short in the wiring loom between ECU and injector can cause a state where one or more injector is held all the time open. Coil packs are usually switched in the same manner.

A way of testing this is a scope or good quality multimeter that can measure duty cycle.

Bear in mind when using plug-in diagnostics to read live data where the ECU may still show normal(ish) switching of the injectors, but the actual signal at the injectors is constant (unswitched) due to a wiring short. Also a faulty ECU with blown injector or ignition drivers can still show normal switching behaviour on plug-in diagnostics live data, but still have no output or improper output at the multiplug pins.

scoobyJim2

This is what i meant by injectors not working in time

KainUK

Well thanks for all the help everyone, but today I've bit the bullet.
The recovery van is due to collect the car and send it to a professional.
Thanks again for trying to get to the bottom of my problems (with the car at least lol) but I think it's out of the scope of my abilities (which are not too grand)

I'll let ya'll know what the good word is
Chris

scoobyJim2

Good luck mate let us know! Before it goes,have you checked to see if its the same problem as before? You might have nicked/split the o-ring when fitting the new injectors

KainUK

Well fellas, got my car back yesterday...
I'm pleased to report it wasn't anything sinister, it turned out to be a component failure on my lpg system which I realised I never mentioned.
It was the emulator which takes the signal from the ecu and converts it for the lpg, but it went mental and kept the petrol injectors open.
Now I've fitted a Bosch universal O2 sensor which is throwing up low voltage on front O2 heater, so I'm looking for an original type.

Cheers for all you help and advise
Chris

scoobyJim2

Quite a big thing to miss out that its lpg lol. So it was injector related then. If you can put a picture up of 02 sensor you need I'll have a look in my parts box for you,im sure I have an 02 sensor in there you can have if its the same

KainUK

I know it's a big thing to miss but due to the issues being on the petrol I never give it a thought do'h
I'll get you a picture over shortly, it's a 4 wire one with yellow sleeve
Much appreciated jim, your a top guy

Chris

KainUK

Plug


Sensor

22641 AA280

ALi-B

iTrader: (1)

For **** sake LPG!

Rule one of diagnosing LPG equipped cars.. assertain that the LPG "piggy back" system isn't interfering. As 50% of the time they do interfere.

Thats partly why I said in my post above that live data from the ECU should not be relied upon as thats all the engine ECU thinks it "sees", not what is actually delivered to the engine, where a scope measurement at the inectors needs to be taken to see what is actually happening. As in this case looks like the LPG ECU is providing a ground path for the injectors, hence holding them open. During this, the engine ECU will still report normal (ish) duty cyles.

Anyhoo, good call to whoever found the problem.

scoobyJim2

Its so hard to diagnose problems without pretty much explaining every thing about your car.you got there anyway no worries kain,glad to help,I will try dig it out tommorrow

KainUK

consider my wrists well and truly slapped fellas

scoobyJim2

Kain I can't view your pics,if you want to inbox me your number I'll whatsapp you the 02 sensors I've have.I found 3

scoobyJim2

One of them I can see a code thats similar to yours. 22641 AA042