I am having a problem,with a 110 engine,bought the car it never ran when i bought it,and has set for years.I have it runing but no exceleration,only idell .It has an ox sensor,air flow sensor,single ex, euro intake.I think my w.u.r. is bad,i have read there are 3 different pres. i have 4 used ones. How do i know if the one that on car is right. do you match# on fuel distributor's with # on w.u.r. To make sure all have same pres.