These jerks from my car happens when you cold, with soft temperature, does not matter. Ever uphill, never descents. The fact is that they have gone through the machine and see nothing, the plugs They are fine, the same as the color of the exhaust and have no confidence in the car or take it know which workshop.
Response Technical Director Miguel Garcia Highway Bridge
No doubt the workshop should be able to find the origin of the jerks. However, when problems are sporadic no choice but to read them in the registry to stop the car ... if there was something that register left. The power loss It has any origin, but does not always lead to failure to memorize the switchboard. So you mention, as you point out it runs out of power understand that your main complaint is over the accelerations. One of two things, or not getting enough fuel or air arrives (or is not able to burn the mixture). as the plugs They have appropriate color (I guess they have looked at the workshop and that all are equal) it is clear that burns well. also it is out there somewhere cylinder that works worse than another, which would also detected by a change in the noise. Since they have inspected the plugs I understand that the electrodes are well and conveniently spark jumps, which could fail to tread a lot. So, you think you could ask them to check the operation of the fuel pump. If you do not get enough fuel it difficult to speed up everything you ask. If the situation is sustained for some time, maybe even lacks fuel no longer to accelerate, but to keep a steady pace then a moment of certain requirements and yank even when you've stopped accelerating and move steadily . Overall, if you've been very careful while driving the car lately, you might see some change in pump noise. It is true that it is integrated into the tank, going back and your sound is very blunted, but if you walk "with the fly behind the ear"There are cases where you can hear it. This may not be the solution to your problem, but as a general, it may also be worth to others, should not rush much the deposit, filters because although the pump can suck elements and decanted particles are concentrated to the tank bottom. It's the same reason you should not fill up just as the tanker just remove the tank contents at the gas station.