i got an IP from junkyard that i put in a 300D. for some reason the "stop" seems like its having a problem with the spring, it wont pop back to where its supposed to. any suggestions before i have to remove the IP and dismantle it?

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1985 300D - "Desi"
1981 300D - "Pepi"
1984 240D - "Sticky"
1985 300TD - "Flitstone"
1984 300TD - "Frenchie"
1987 300TD - "4481"