hi all . i have a problem with my pintarra wagon 1986 model 4cyl it back fires up through the motor on starting at times, and seems to be running abit rich , and it is chewing alot of extra fuel about a third more than normal a mechanic had alook at the timing and said it is fine said it could be a sensor or somthing like that and could cost abit to find out the problem may be some one has had a simlar problem or an i dear that may help the car runs perfect besides that any help would be appreciated
garth