View Full Version : 350 High Idle

11-30-2009, 06:28 PM
"I have (2)1994 350 Engines with marinepower EFI. One engine idles about 2000. When put in drive or reverse also runs faster than other engine.

I added fuel inj cleaner, no help. Inj seems to be spraying evenly.

Warm or cold it wont go down to 800rpms. Once I start the engine its starts at 1000 rpm then slow moves up to 2000 and stays.

Any ideals , trying to fix myself. Other engine and this engine used to idel at 800.


12-01-2009, 10:59 AM

Did you Check for any vacume leaks"

12-01-2009, 11:08 AM
"I think so. Only seen one vacuum line that goes into small black box with electrical connection. I swapped the black box out with the other engine, ni difference. Are there other vacuum linesN"