Ok my wifes car, a 93 LX 2.3, has developed a problem the tach has started to mess up and the check engine light has recently started coming on. pulled the codes got 223,loss of dual plug inhibit control (DPI), 224,erratic IDM input to processor now I know that the ignition diagnostics moniter (IDM) is an output signal that provides diagnostic information to the EEC and is also the input signal to the tach so where should I start looking to find why it has an erratic signal? Also what should I check for the dual plug inhibit control? Any help would be greatly appreciated.
tach problems
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Stinger
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Ignition module is failing. It's located on the front of the intake manifold with wires coming out of both ends...replace and all is well.
181 is system lean
Check fuel pressure regulator. Take a look at the regulator and make sure the vacuum line feeding into the top is connected and in good condition. You were just in that neighborhood replacing the ignition module, you could have pulled it loose or aggravated a dry-rotted vacuum line.
Check Throttle Position Sensor. - there's some great info on testing and setting TPS's around here if you search for it.
Go back and check everything in and around the area you were working. It didn't run this bad before you did the module swap I'm assuming, so it's possible the problem lies there. Not the module itself, but the surrounding area. The more I think about this it sounds like a vacuum leak.
Check fuel pressure regulator. Take a look at the regulator and make sure the vacuum line feeding into the top is connected and in good condition. You were just in that neighborhood replacing the ignition module, you could have pulled it loose or aggravated a dry-rotted vacuum line.
Check Throttle Position Sensor. - there's some great info on testing and setting TPS's around here if you search for it.
Go back and check everything in and around the area you were working. It didn't run this bad before you did the module swap I'm assuming, so it's possible the problem lies there. Not the module itself, but the surrounding area. The more I think about this it sounds like a vacuum leak.
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