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ZUKIWORLD Discussion Forum => Technical Discussion - Beginner / Repair => Topic started by: us74k5 on February 28, 2010, 11:04:56 AM

Title: 1.3 idles out of control after swap.
Post by: us74k5 on February 28, 2010, 11:04:56 AM

Just replaced the 1.3 in my 86 sami. Now the engine starts up just fine, then just proceeds to idle all the way to 4-5k. Twice it has started and idled just fine for a minute or so, then it just races away. Any help would be much appreciated, thanks.

Title: Re: 1.3 idles out of control after swap.
Post by: Bobthebiker on February 28, 2010, 11:33:04 AM

this sounds like a major vacuum leak issue to me,  I'd look into all the vacuum hoses, make sure they're tight/solid and not leaking.   also make sure your carb isnt loose on the manifold.

Title: Re: 1.3 idles out of control after swap.
Post by: us74k5 on February 28, 2010, 11:36:56 AM

Carb is solid, cannot find a vacuum leak anywhere... I have no idea what else to look at.

Title: Re: 1.3 idles out of control after swap.
Post by: us74k5 on February 28, 2010, 05:20:56 PM

Anyone have any ideas? I have gone over the engine several times, no luck. Cant seem to figure this one out.

Title: Re: 1.3 idles out of control after swap.
Post by: wildgoody on February 28, 2010, 05:52:10 PM

spray carb cleaner around the outside and listen for changing
RPM, also check the brake booster line, however a carb engine
should run bad and stall with a major vacuum leak like that, where
a FI engine will rev due to extra air.

Also check the fast idle cam and choke to make sure they are
turning off when the engine warms up

Wild