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swapped motor idels all crazy, help!!!!

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Old Jan 1, 2003 | 06:55 PM
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Default swapped motor idels all crazy, help!!!!

okay i swapped a 91 LS motor into an 89 civic DX, everything is wired up good, but it idles like it has a bad IACV but no check engine light and i even blocked off the two holes in the throttle body because it was the only way to get it to come down, worked for about an hour then it starts doing it again. all the vacuum line are hooked up, but im not sure if they are exactly correct, im still runing the dx MAP sensor, any suggestions????
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Old Jan 18, 2003 | 08:58 PM
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CHECK YOUR FUEL RAIL
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Old Jan 29, 2003 | 09:05 PM
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Default Re: swapped motor idels all crazy, help!!!!

Originally posted by "NChatch"

okay i swapped a 91 LS motor into an 89 civic DX, everything is wired up good, but it idles like it has a bad IACV but no check engine light and i even blocked off the two holes in the throttle body because it was the only way to get it to come down, worked for about an hour then it starts doing it again. all the vacuum line are hooked up, but im not sure if they are exactly correct, im still runing the dx MAP sensor, any suggestions????
check the TPS sensor.. I know thats what screwed my car up big time!!
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Old Jan 30, 2003 | 06:44 AM
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Yeah the wires on the tps need to be switched for the mpfi conversion, did you switch the wires? Also check the tps adjustment.

You should be fine with the dx map sensor. To make sure the map sensor is getting the right pressure hook it up on a single line to the throttle body with no tee's.
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Old Jan 31, 2003 | 06:46 AM
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my ls did that when i first put it in, i was using the dx MAP also and after i changed it to an LS it seemed to work fine.
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