i was already working on that and i found my problem. I used a different car then the one used in the edited file... i used the sentinel instead of the infernus. well i copied and pasted a little too much. In the car id's I had two 141's instead of a 135 and 141. I would suggest that you check that... default.ide as you can see below.
cars
# Id, Model name, Txd name, Type HandlingId Game name, Anims Class Frq Lvl Comprules
#
# cars have two extra fields wheelmodelId and wheel scale
# planes have one extra field model id of low level of detail
...
141, sentinel, sentinel, car, SENTINEL, SENTINL, null, richfamily, 10, 7, 0, 254, 0.7
136, rio, rio, boat, RIO, RIO, null, leisureboat,10, 7, 0
137, firetruk, firetruk, car, FIRETRUK, FIRETRK, null, ignore, 10, 7, 0, 255, 1.0
138, trash, trash, car, TRASH, TRASHM, null, big, 10, 7, 0, 255, 1.06
139, stretch, stretch, car, STRETCH, STRETCH, null, ignore, 10, 7, 0, 251, 0.75
140, manana, manana, car, MANANA, MANANA, null, poorfamily, 10, 7, 0, 256, 0.7
141, infernus, infernus, car, INFERNUS, INFERNS, null, executive, 7, 6, 0, 249, 0.75
have to watch those typos