Rough idle and shuts off

1993 MAZDA B2600
247,000 MILES • 2.6L • 4 CYL • 2WD • AUTOMATIC
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CKUREK93
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Hello,

I have the truck listed above that is having engine issues. It running really rough and will shut off if I do not keep the throttle open. I recently replaced my injectors, cap and rotor, distributor, spark plugs, and wires. I also changed the fuel filter and alternator. This was happening well before I replaced all these parts. And the ECU was replaced in 2013. The check engine light is not on, and I am not quite sure how to check if there actually is any codes. After replacing all those parts the issue still persists. I have also cleaned the ignition control valve. I am not sure what is causing this issue. Can anyone help me better understand what could be the issue? I cleaned the idle control valve not the ignition control valve. Just for clarification.

Thank you.
Dec 18, 2017 at 5:33 PM
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ASEMASTER6371
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Good afternoon my name is Roy and I will assist.

Check for vacuum leaks. That is the most common cause for rough idle and stalling. Look at all hoses for cracks or breaks.

Roy
Dec 19, 2017 at 9:41 AM
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CKUREK93
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Hello Roy,

Thank you for your reply, I will check them. What would be the best course of action to check them? I have heard of using seafoam but I am not sure about that stuff.

Thank you.
Dec 19, 2017 at 1:07 PM
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ASEMASTER6371
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Sea foam is for flushing the oil system and intake system. To check for vacuum leak, you need whats called a smoke machine. it injects air into the intake system and when there is a leak, the smoke will appear. This test can be done by a shop and runs about 50 bucks.

Roy
Dec 19, 2017 at 6:01 PM