engine revs up for no reason

[tartan lad]

just recently i took my engine out of the frame to get exhaust studs drilled out (got that sorted) when i put engine back in the frame and all wires connected and ready to start so i hit the start button it started but it reved to 4000 and stayed there, the throttle cables seam to be ok, WHAT COULD BE THE PROBLEM, cheers from tartan lad.

[KiwiCol]

Wouldn't have something jamming the throttle bodies linkages by chance? Wouldn't have to be much to get 4000 rpm with no load on it, just not sitting back where they should be.

Another possibility, the adjuster screws have been messed with while the engine was out?

[seth]

Could be a few things that being probably the most likely @KiwiCol
Hope you find the problem
Good luck

[VladTepes]

What's a "ressionjust "

(If you let me know I can amend the thread title to correct it)

[gsxbarmy]

What's a "ressionjust "

(If you let me know I can amend the thread title to correct it)

I think he means "no reason". I've adjusted the heading to reflect that