1991 Mazda MPV Fuel injection

1991 MAZDA MPV
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TERRY P
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Engine Performance problem
1991 Mazda MPV 4 cyl Two Wheel Drive 160000 miles

The engine lost power i am getting spark on all cylinders the engine has a dead miss the owner replaced all plugs wires cap rotor and the distributor I ran the engine what i found was #3 cylinder isn't getting any fuel the owner has ohm the injectors he tell me they all read the same can you tell me what I need to check next
May 15, 2010 at 8:05 AM
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MHPAUTOS
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Hi there,

Thank you for the donation,

The injector can still be faulty even if it is powered up, listen for a click, place a long screwdriver on the injector and place you ear on the other end, you should heart the injector click when running.

mark (mhpautos)
May 15, 2010 at 9:24 AM
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TERRY P
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We tried a new injector still nothing I am going to try noid lights to see if ther is a signal at the injector if ther is not what do I try next? I am going to check again for spark with a spark checker
Jun 20, 2010 at 7:27 AM
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MHPAUTOS
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do this and let me know what you find, i will have a think about alternatives in the meantime.

mark (mhpautos)
Jun 20, 2010 at 7:42 AM
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TERRY P
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Ok I put the noid lights and spark checker good spark no signal at the injector and I checked the noid light on another injector it checked good
Jun 20, 2010 at 1:20 PM
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MHPAUTOS
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Check continuity of injector wire (light green / black) to term U2 at ECU and wire (black / yellow) to main relay.

Mark (mhpautos)
Jun 20, 2010 at 5:11 PM