The car has a manual transmission, and lets say I'm shifting into ( any ) gear, once I let go of the clutch, at first it will continue upping the rpm towards the next shift, as it should. But suddenly in a random, unintended, unprovoked manner, it will slow down ( feeling almost like a downshift ) It will do this for a few seconds, then reset itselft , back to normal rpms and shifting. And , to make sure I'm clear, it does this "whenever"., and it can happen in any gear. Sometimes it will go for days and not do it at all. When it does it on the highway, however, it will not reset itself. Instead continuing to slow down to a crawl, no matter what I do. . That's when I find a shoulder, wait a few , restart the car and it's like nothing ever happened. I sent the RCM to DJ Tighe in case it's the fuel pump relay, but I'm wondering if anyone had a similar situation, and could help with a dx.