Spyder Rough idle

[Eclipselover]

Hey everyone I just had my 1997 Gst spyder taken into the shop for water pump replacement and timing belt

the car starts... at idle it sounds like it’s surging. But when you raise it anywhere above 1000 rpm. It’s normal and the surging goes away totally normal

Any ideas ?

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[Eclipselover]

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[ThunderChild]

If the water pump was just done it may have air trapped in the TB lines still, not allowing it to heat up the FIAV and causing surge. Ensure the coolant is topped off and keep running it, it should eventually purge all the air and stop surging.

 

[motomattx]

First thing that I would check is that the timing marks line up perfectly, its very very easy to have the exhaust cam one tooth off after rotating the engine over once.