05-24-2005, 03:52 PM
buy a compression tester, take off all the plugs and wires, take out the fuse that controls the FI (like.. in my honda it would be the No 38 10A PGM-FI Main Relay in underhood fuse box) yank whatever the equivalent in the focus is.. screw in the compression tester.. maybe oil it up a bit so you don't mess up the o ring.. get someone to go in the car, put the gas to the floor to open up the throttle fully and crank the motor over 5 times so you can get a reading
no clue what the reading or tolerance should be for a focus, but i think the 2.0L 16v motor has similar compression to a B18A so i guess maybe the b18a spec of 185psi nominal, max allowable variance of 25psi should be somewhat of a ballpark for you
you are doing some hardcore FI install right? you should try to get your hands on the factory shop manual for the focus.. not a haynes or chiltons.. the actual ford manual.. i found the integra manual online. it has so much more detail than the haynes or chiltons.. totally blows them out of the water..
no clue what the reading or tolerance should be for a focus, but i think the 2.0L 16v motor has similar compression to a B18A so i guess maybe the b18a spec of 185psi nominal, max allowable variance of 25psi should be somewhat of a ballpark for you
you are doing some hardcore FI install right? you should try to get your hands on the factory shop manual for the focus.. not a haynes or chiltons.. the actual ford manual.. i found the integra manual online. it has so much more detail than the haynes or chiltons.. totally blows them out of the water..