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Testing Compression Ratio?
#3
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..
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Messages In This Thread
Testing Compression Ratio? - ZX3TUNR - 05-24-2005, 03:35 PM
Testing Compression Ratio? - 01-yellow-ZX3 - 05-24-2005, 03:40 PM
Testing Compression Ratio? - naz - 05-24-2005, 03:52 PM
Testing Compression Ratio? - ZX3TUNR - 05-24-2005, 04:17 PM
Testing Compression Ratio? - Zoom - 05-24-2005, 05:37 PM
Testing Compression Ratio? - meford4u - 05-24-2005, 10:07 PM
Testing Compression Ratio? - darkpuppet - 05-24-2005, 11:02 PM
Testing Compression Ratio? - ZX3TUNR - 05-24-2005, 11:20 PM
Testing Compression Ratio? - Jays2000ZX3 - 05-24-2005, 11:21 PM

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