5.7gsi won’t return to idle

[boatingfun]

I have 2000 Volvo 5.7 gsi.
when I slow down from mid to high speed/rpms my engine doesn’t idle all the way back down. I shut the engine off and turn it back on it immediately returns to idle as it should
Last season I replaced my fuel pump. A couple times last year
it would do this randomly but now it’s every time my engine is run above mid throttle.

 

[Scott Danforth]

check your throttle cable. it probably isnt returning to idle at the engine and the shut-down and re-start shake it enough.

use a bit of lube if the cable is hanging up.

quit throwing parts at the motor and properly identify what is wrong. replacing a fuel pump more than once usually indicates its not the pump.

 

[alldodge]

Might be a dirty IAC valve and its sticking, but what is your motor serial number?

 

[boatingfun]

Fuel pump was replaced once last season due to pump failure.
Engine Serial number 4111663589

 

[alldodge]

The number shows up as the drive

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