FAILURE SEAT TOLEDO GLX 92

Hello. I have a Seat Toledo 1.8 GLX of the year 92. My problem is that it starts perfectly in cold, but when it takes time in operation it starts to stop alone. He has been in the workshop for almost 6 months and they have reviewed him from top to bottom without finding anything at all. The gasoline pump has changed, a sensor, the battery is new, the wiring is theoretically well (theoretically I mean that the mechanic has told me that but they tell me that it is most likely an electrical failure). At first we thought that gasoline had some water and we put a product, but nothing. I wanted to know if something has happened to someone (since they have told me that these cars have had many failures, although mine had never failed ...) or if anyone knows what can happen to him.
All the best

Look at the feeding of the motor control unit, these units are usually fed from a relief (called 30) that is usually located under the steering wheel

There are many cars that make this failure and in all they are different problems, the relay that mentions you Titinemo, is one of the factors since this relay is a potential relay, and has incorporated a kind of sircuito in charge of distributing the spark and the pump current, it is half complex, but also check that you do not have between air in the fuel injection system, test to others with a direct installation of fuel And put direct cables to the pump, the last thing to do is check the continuity of the spark, if you have ignition module sometimes they work problems and when they go inside the worse pro -only distributor to take them out of putting them more outside, now it may be doing an intermittent cut, test and abyssians to continue helping you.

I also have a 1.8igl Toledo and something similar is happening to the first one and when it has been running for a while in a traffic light and if I stop it, it costs a world to start.

Czech the temperature sensor