A Photo tutorial on how to replace an IMRC in a Ford Escort 2002 SOHC 2L engine. This assumes that the OBD2 reader has returned a DTC code of P1518, “IMRC Stuck Open” and that the “Service…
Ford Escort 2002, IMRC Replacement
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If that spring rotates when the IMRC is energized is it safe to assume the
internal butterfly linkage is free?
Just curious as to how much the new part cost you because I have to replace
mine because the code says its stuck closed
Thank you so much for showing this video. The same thing is happening to my
car so I will order the part but not have to pay dealership labor costs to
get it replaced ๐
The spring itself does not rotate. It is attached at the block and the
linkage control horn that engages the IMRC control horn. The spring assures
that the butterfly linkage will return to the full open position as the
IMRC returns to that position. This is what is known as pre-loading. This
was likely done to simplify the engagement bewteen the two control horns.
The butterfly linkage should turn freely except for the force to over come
the spring tension.
To clarify: The butterfly linkage should turn freely except for the force
to over come the spring tension. If the spring is turning freely while the
butterfly linkage remains unmoved, the spring is broken and that too would
be a problem. This would be evident if the butterfly linkage turns
completely free and does not return to the full open stop nor would there
be any spring tension to overcome. Hope that helps.