is it possible that wrong fuel is in?

im letting it idle and injector light is constantly on now

also found out exhaust got a hole after cat, could explain that strange noise under car

as in it might have diesel in? unlikely - diesel pumps have a bigger nozzle and don't normally fit in a petrol filler (that not always true and its been a while since i had a mk1 punto). Its done like that cause diesel in a petrol is very bad, whereas petrol in a diesel is no big deal.

well gonna take lambda from donor and re wire and see if that is gonna do anything
would bad lambda cause injector light to be on?
next step: change whole throtle body or only injector?

Lambda can make EML come on yes - hence the fact the ecu logged the error before... It can put eml up because its gone completely open circuit (i.e. totally failed and not getting a signal from it) or could do that from a wiring fault rather than the actual sensor failure. Remember the light is just an engine management light and has nothing to do with injectors per say but if you have another known working TB then swap the whole lot as that also rules out any of the little sensors on it, TPS, ICV, AIT.....

blu73 said:

Lambda can make EML come on yes - hence the fact the ecu logged the error before... It can put eml up because its gone completely open circuit (i.e. totally failed and not getting a signal from it) or could do that from a wiring fault rather than the actual sensor failure. Remember the light is just an engine management light and has nothing to do with injectors per say but if you have another known working TB then swap the whole lot as that also rules out any of the little sensors on it, TPS, ICV, AIT.....

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engine was cold, i disconnected lambda, turned on car and made no difference

yeah it won't make any difference during startup and when cold, the ecu is running rich while it warms up... It could still log a fault but it shouldn't affect the starting and idling right after while cold.... So its doubtful the lambda is causing the starting and poor idle issue but that doesn't mean the lambda can't make the EML come on during that time.

do i need to swap whole throttle body to change injector or can it be taken out
just remembered spark plugs were dark

the injector can be taken out and swapped but there is little point - the injector itself failing I have never heard of. But you could try taking the whole TB you have spare and sticking that on.

plugs dark? as in all sooty and black on the electrodes? did you clean them up before you stuck them back in??

blu73 said:

the injector can be taken out and swapped but there is little point - the injector itself failing I have never heard of. But you could try taking the whole TB you have spare and sticking that on.

plugs dark? as in all sooty and black on the electrodes? did you clean them up before you stuck them back in??

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black on electrodes yes, didnt clean them

Mmmmm, indicative of running rich. Try cleaning them up and re-gapping them (0.9mm from memory but look it up) - see if that makes it start and idle better - and if it does do resistance test on the coolant temp sensor

blu73 said:

Mmmmm, indicative of running rich. Try cleaning them up and re-gapping them (0.9mm from memory but look it up) - see if that makes it start and idle better - and if it does do resistance test on the coolant temp sensor

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coolant temp sensor is 21 years old probably still original, but i dont think that would case problems in starting car

i changed spark plugs on 28.10.2014 ngk bcpr6es, warranty on plugs?

no i don't think it will either, but it could make it run rich all the time which would eventually coke up the plugs to the point of not sparking properly... If that was the case cleaning and re-gapping them it would start ok but still run rich..

So my point was to clean them and gap them and see how it starts - that on its own could be the issue. Then look at the temp sender as that would be the first thing to look at for a reason for it to run rich.

PS> you don't have to quote me every-time you respond you know

lambda and plugs are all dark

can that be cuz of bad temp sensor and running rich all the time?

do i have to drain antifreeze to change temp sensor

:spam:

mk2 lambda fit mk1 ? i know i will have to rewire, but will it work properly?

changed everything electrical related but its still same
what else can it be

Have you put the crank pully in the right position?

hf turbo said:

Have you put the crank pully in the right position?

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you mean that little pip? its in right possition, it suddenly started to behave like this, before it was more or less fine

Yes that's the one mate

Have you got a spare set of coil packs

This thread is confusing and not really going anywhere, mostly because you hijacked someone else#s ancient thread!

Start again and explain the spec and condition of the car, what you have observed, and what you have tried.

I have had similar things with a 1995 Tipo 1.4 and a 2001 Brava 1.2, generally it is sensors / wiring / air leaks that confuse the ECU or the fuelling.

The Tipo had an intermittent starting problem that was traced to the temp sensor and also it's flaky wiring. The Brava had an ECU light issue and rough running which was an airleak / crack just upstream of the 2nd lambda sensor.