Idle problems 318

[scottyjean]

I have a 1973 Trojan F31 - twi

I have a 1973 Trojan F31 - twin 318 Chryslers

My Stbd engine starts ok but it idles at a very high idle.Too fast to put into gear.

No adjustment with Idle screw. Choke appears to be working. The engine runs cold.

Any help with this problems will be appreciated

 

[Bosco]

Make sure the fuel pump diaphr

Make sure the fuel pump diaphragm hasn't failed. It would be dumping excess fuel into the carb.

 

[fastjeff]

"Simply adding more fuel will

"Simply adding more fuel will not raise the idle speed--more air is getting in somehow, and you need to findout where.

I suspect your throttle linkage is not coming back all the way (which is easy to check--simply remove the linkage at the carb). If that's not it, then the carb butterflies are not closing for some reason (binding throttle plates, mis-adjusted throttle plates on the throttle shaft, etc.) Finally, assuming this is a 4 barrel, the rear butterflies may not be closing completely due to binding in the linkage.

Jeff"