Originally posted by gearhead98:
but back to the question yes the ECU knows what size injectors should be in there, and if its not right, like in my case, it tells you are running rich, or lean if you went smaller??
Yes - but it's not guranteed to trip a CEL.
The diff from a 17# to 19# is just plus 11.7%, the fuel trim will not trip a CEL until +/-20ish% trim, so likely it will just pull in the mixture in and run with negative trims. It'll run funky till it pulls in the mixtures, but it does it within a couple drive cycles.
I think where people get into trouble is that the later contours run with like 50psi fuel pressure, so if they swap in a mustang 19#er that is specd in the 38ish or low 40ish psi range they will get an equivalent to a 21# or 24# (forget the exact #) injector...
I ran my car for about a year with 19# mustang injectors on my "regualr" fuel pressure system before getting a chip.
97 Contour SE MTX
K&N 3530, UR UDP, 19# Injectors, mystery mod, FMS wires, Fordchip.com chip, SVT: TB, Flywheel, clutch, exhaust
04 Grand Caravan SXT
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