Hello people,

I think my problem is in CMP sensor, I'm not sure what it is but the diagnostic tool or as we call it in my country THE COMPUTER (you know, to see the problems in the engine, to check the engine how is it working, sorry for not knowing the real name of it) showed that the engine is not working OK and the mechanic said that it could be the CMP sensor. My Brava is very poor in accelerating in first and second gear and in third you can say that it is going well but I cannot use all of its power and it spents a lot of fuel. The second and third plug doesn't spark well enough in the exact time they need to spark.

My question is: Could be the problem with the CMP sensor? Is that why my car is not going well?

Brava 96' ELX 1.6 16v

It seems if it's the oxygen sensor that's gone, it's also called lambda sensor. These things should be changed every 50k or so and make a hell of a difference in fuel consumption and performance. You can do a search on it here. Maybe your sparks need changing too. What do you think folks?

TheCROW said:

It seems if it's the oxygen sensor that's gone, it's also called lambda sensor. These things should be changed every 50k or so and make a hell of a difference in fuel consumption and performance. You can do a search on it here. Maybe your sparks need changing too. What do you think folks?

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i agree, ive just changed mine, the difference is astounding, if i was you id change the ect as well as this can affect fuel consumption also they dont cost much

The splugs or the sparks are new but they are not NGK, I heard that this type of plugs are the best for this angine but I think that is not because of them. So you think it is lambda sensor? I thought that too, because someone had the similar problem with hesitation and everybody said that could be the lambda sensor. I don't know what to do but I can say to mechanic that maybe lambda sensor is the problem so he can check it. If anyone has some ideas, TELL ME!

Soryy for I don't know these thnigs Misckn but what "ect" (if i was you id change the ect as well) stands for?

I'm a bit week in knowing what you call the parts of the engine because I'm from Bosnia and I don't know that sort of things, even dough I know English preety well, I'm studying English language and literature.

Thanks for the tips.

mickn said:

i agree, ive just changed mine, the difference is astounding, if i was you id change the ect as well as this can affect fuel consumption also they dont cost much

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What is the ECT and how can we change it?

TheCROW said:

What is the ECT and how can we change it?

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Exactly my point! We would be very thankful for the explanation off the word.

The ECT sensor is located on top of the engine its identified by its blue plug, when this fails the value of its resistance changes and the ecu thinks the engine is cold, adding more fuel as it would when cold, cheap and easy to change 10 mins tops, most fuel injected modern cars have an ECT sensor, basically think of it as the electronic equivalent of a choke on an older car with a carburettor, showing my age now eh

Can anyone give any more info on this? Photos maybe?
Thanx.

Thanks for the tip mickn, I've sent you a message. I hope I will found the sensor, it would be great if you have a piscture of it and where it is positioned.

Any way, thanks!

hang on a minute, didn't you say there is insufficient spark on cylinders 2 and 3!! when the coil fails on the 1.6 you lose sparks on cylinders 1 and 4 or 2 and 3. to check the coil you get a multimeter and check the resistance between the HT outputs for 1 and 4, then 2 and 3. if the resistance of both these pairs is the same the coil is ok, if there is a difference the coil has failed. i think thats your problem, its common on the mk1 1.6 bravos

jug said:

hang on a minute, didn't you say there is insufficient spark on cylinders 2 and 3!! when the coil fails on the 1.6 you lose sparks on cylinders 1 and 4 or 2 and 3. to check the coil you get a multimeter and check the resistance between the HT outputs for 1 and 4, then 2 and 3. if the resistance of both these pairs is the same the coil is ok, if there is a difference the coil has failed. i think thats your problem, its common on the mk1 1.6 bravos

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Yes i've said that. What is a coil? I'm not familiar whit you words connected to cars and carengine so can u explain it to me?!

jug said:

hang on a minute, didn't you say there is insufficient spark on cylinders 2 and 3!! when the coil fails on the 1.6 you lose sparks on cylinders 1 and 4 or 2 and 3. to check the coil you get a multimeter and check the resistance between the HT outputs for 1 and 4, then 2 and 3. if the resistance of both these pairs is the same the coil is ok, if there is a difference the coil has failed. i think thats your problem, its common on the mk1 1.6 bravos

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Sorry, I havent read the massage you sent me, I know what is a coil. But the mechanic changed it and this was not the problem. But, I will check the resistance in any case. Thnx

in that case are you sure the plug leads are in the correct places? the coil has numbers 1-4 for each cylinder. if the leads aren't correctly placed it will cause very rough running.

Yes I'm sure. The electrician check it and said that it's fine. I have to take off the CMP sensor from another engine and try to change it with mine to see if it works. Everybody said that their are positive that is CMP sensor.

well if it is the cmp sensor (camshaft position sensor) you can simply unplug the one on your car. if it makes no difference when unplugged they thats the problem, if the car gets worse with it unplugged its probably something else.

jug said:

well if it is the cmp sensor (camshaft position sensor) you can simply unplug the one on your car. if it makes no difference when unplugged they thats the problem, if the car gets worse with it unplugged its probably something else.

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But how can I unplug it? I mean, without help of electrician?!
The electrician said that he needs a special kind of tool to change it. Is that true? I've download from this site the scheme of Marea engine and it showed me where it is but I cannot see it.