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Real progress but not right yet. With the re-manufactured engine and like-new throttle body I really have a lot of power going to wheels. When I put on the new throttle body, I also changed out the idle air control (Motorcraft) and a “new” throttle position sensor (Standard Ignition rebuild of Ford part). After putting it all together, the car runs great, has much more power BUT (always a but) the idle is fast when the throttle position sensor is plugged in (stalls when not) and now I’m getting a 121 and 332 code which seems to be related to idle speed being too fast. Instead of idle at say 800 rpm, it wants to idle at 1000. I’m also getting a periodic reading that the EGR is not opening (have not changed that). I’m wondering if the TPS is off somehow or not installed correctly. It just screws on – and does not have anything to adjust. I’m “pleased” with how it’s finally running but still trying to just get it all right. Oh, and I did let the computer relearn (by disconnecting the battery for about 20 minutes) but the idle is still fast (again 1,000 rpm versus maybe 800). I need a pro-Ford person to tell me where I’m messing up. Thanks.
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Stupid question did you ohm out the wires from the sensor to wherever they go? Also did you measure the resistances of the TPS normally it has two potentiometers for a throttle position sensor normally. I would also check grounds you just put a new engine in if the grounds are loose or weren’t cleaned well, etc, etc it could cause your issues. But, I want to say TPS first.
Since there is only one way to plug the connector back in I just did that. And the old units were “working” although a couple of good mechanics around here did think the idle control valve could be bad. I did not measure the new TPS in any way. Unless it was defective I just figured it would work right out of the box. Both the idle control valve and the TPS have connectors that only allow them to be plugged in one way. So, I’m hoping it is that simple (but I really do not know). I just wonder if the new TPS is somehow installed wrong (by me) or possibly defective in some way (which I doubt).
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