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Posted on Dec 02, 2009
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I have a 1983 toyota pick up truck with the 22r engine.The problem is it runs rough when it is idling and black soot is coming from the exhaust.I have a manual choke which works fine.I have put a new pvc valve new gas filter new air filter and it did not do any good.I found two wires coming off the idle fuel solenoid that were broke so I got another fuel solenoid and install it but it did not do any good.One thing I did discover that when I disconnected the wire harness from the fuel solenoid that engine ran normal.But when I connected wire harness together the engine ran rough and black soot was coming from the exhaust.I did check the solenoid to see if it worked and it does.

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  • Posted on Mar 17, 2010
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Check the MAP censor. Manifold Absolute Pressure, that would cause it to run rough. Thats the only thigh i can think of.

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  • Posted on Dec 27, 2009
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It shouldn't run at all with the solenoid disconnected. That should be 'ON' when the engine is on, or it won't run. Maybe the solenoid circuit is dirty so that it only opens a bit, or the fuel it allows through is limited by a dirty passage. I wonder why the wires were disconnected in the first place. It shouldn't run if that is the case!

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