what causes this vehicle to run on 2 cylinders?

1991 MAZDA B2600
306 MILES
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DARIUS IRWIN
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I am trying to repair this truck for a friend, and I cannot find what is causing it to run on 2 cylinders. The person he bought it from had been working with the computer and bought a replacement, but I don't think that it is the problem. Any help would be great.
Thanks,
Darius Irwin
Mar 30, 2012 at 11:19 PM
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RASMATAZ
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Check if all the injectors are pulsing-
Mar 30, 2012 at 11:24 PM
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DARIUS IRWIN
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So, if the truck starts running OK, which it did on me today when moving it from the shop, after running rough, is it the injectors? Should I be looking elsewhere, if this continues, or just replace the injectors?
Mar 30, 2012 at 11:35 PM
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RASMATAZ
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This what you do-check the fuel pressure if its within specs if okay-get a noid light or rent it out from the parts store and check the injectors harness if its pulsing
Mar 30, 2012 at 11:49 PM