MECHANICAL FAILURE IN A GRANDE Cherokee 98 American

Good afternoon, I have a great hurry with my Grand Cherokee, the technician in automotive mechanics cannot repair a fault:
I will be as brief:

everything started with a fault where the engine stopped complete We wanted to use and the surprise was that the car turned on the engine but presented a failure as if it were out of time and did not accelerate, the mechanic commented that it was the gasoline pump the Czech and the pressure was 50 psi, the next thing that it was checar, fuel lines, fuel pump, injectors in a laboratory were checked, distributor, position of position of position of the cranks Damaged the crankshaft sensor and the other parts are fine, it changes it and continues to do the same the engine starts normal, but when accelerating it does not run out, also presenting exploions, fire in the air inlet to the engine giving the sensation that it would be out of time for it for it the mechanic comments that it has to check where the sensor of the crankshaft goes and the information is laughed Distribute, Czech the computer proveing ​​it in another vehicle and in a test laboratory and everything works normal, it tests with the distributor, distributor coil, changes the firing position of the crankshaft again and at the end of making a large revision to the entire system of ingenition and the fault continues to be presented again, when the vehicle is scanned Advise myself in this regard, I would like to please East, we have made several consultations with other technicians and the fault is not resolved, thank me for your attention ...

Czech or change your TPS sensor.

Hojo The failures are not literal with the diagnostic equipment, a problem of set -up of the same distributor could prevent or wanted that the body of the distributor is with axial game, or that marks in two points the spark instead of only one, the wiring is also an option of fault that the scanner recognizes as a sensor problem can be a cut line that fugged or that can even be IMAN Captor sensor, which, when accelerating the vehicle, produces a lack of ppopity, but so you comment against explosions of fire by the exhaust has more to do with some of the tuning since there is no other way that this happens unless any of the permamesca valves avierta when it should not or its award is in very bad conditions.

You should also check the crankshaft pulley, it can be slaughtered and not turn with the gear. When the engine is turned on, only there are exhibitions or there are any other sound?

Thank you very much for your help, the crankshaft pulley is checked as comets there is no game, the explosicons only occur when the engine is accelerated and it is only heard as if the engine is out of time there is no strange noise more, the valves were checked and they are well, likewise there is no axial game in the gear of the distributor, but however I will ask with respect to the sensor TPS, I will ask him if Mark only one, with respect to the game of the magnet collector the truth I do not know if it carries the pulley I think, only the previous sensor was lazy and its magnet was worn we changed it and I improve the start very considerably but the explosions still continue at the time of accelerating I will tell him that checking the set -up thank you, we are still in contact.