I need help for a Chevrolet Monza

Good I am new in this forum and my question is the following I have a Chevrolet Monza Gl that I think it was adjusted, I bought it 1 week ago !! The problem is that it does not start well and there are times that I do not part do the point and it is fine, it has a spark, and throw well benzina, please know what it can be

Friend we will need a little more data to identify the failure, it could be a starting problem, if it makes you strange noises, it could be a spark plug problem, if they are very old or black, or it could be a carburetor or air problem if it is carbonated, if it is injected monophen you can be a problem of a fuel excess, more characteristic damage to help you better help you

Thank you for answering my question the vehicle is monopuntant and as I said before, it is fine since I checked it again now I change the spark plug wires and the distributor's lid and when they took out the spark plugs came out quite black but I have not changed them yet the car if it starts thorough Mark up to 70 and start down, this bad is the compresimeter! But I have put it in my car and this brand up to 105 and from there it starts to go down when you go out to try the monza it is quite well but sometimes accelerated it throws some explosions by the Tbi Lugo by stopping it for about 10 minutes again does not start until it exhausts the battery I hope you can have become clearer and you can help me

Friend Compregation is very low, but the very black spark plugs is for another matter is because of a fuel excess, the combial temperature sensor is crazy, it costs around 4000 Chilean pesos, that will improve the start and end with the black of the spark plugs, you have that first and then you see the packing, but you have little compression that is a fact.

Well, the packaging changes it and the temperature sensor is rethinking new now I manage that the car broke well the problem that mechans now that after going around in the immediate part but it is not maintained that is to say it is for Altiro to explain part to you up to 2000 rpm low consgicompleted with the IAC sensor, etc. And now this happens to me, what can be now?