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1.3 idles out of control after swap.

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Offline us74k5

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1.3 idles out of control after swap.
« 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.
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Bobthebiker

Re: 1.3 idles out of control after swap.
« Reply #1 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.
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Offline us74k5

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Re: 1.3 idles out of control after swap.
« Reply #2 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.
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Offline us74k5

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Re: 1.3 idles out of control after swap.
« Reply #3 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.
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Offline wildgoody

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  • Turbocharged 150HP 1.6L 8V 93MPH 1/4 mile
Re: 1.3 idles out of control after swap.
« Reply #4 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
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