Question about 1987 Chevrolet S-10 Pickup

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1987 S10 6cyl idle wont drop down

Daughter said she heard a pop and hissing when this problem started, I cleaned throttle cable and ran carb and choke cleaner through it. this truck, which only has 90,000 miles on it runs like a champ. Never any major problems. when in gear it will run 35 mph on a flat road. where do I go next?

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Sounds like it has a vacum line loose try to find the hissing and check all the vacum lines around that area

Posted on May 21, 2009


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Clean the choke and linkage around the air cleaner again.

You are on the right track.

I will give ALL the intake manifold bolts a 1/6 turn....just to rule out leaky intake manifold gasket.

Check for loose or leaky vacuum hose.

Since you truck is 1987. I will replace all small vacuum hoses.

Change one at at time.

Change the fuel filter
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Do a good carb. cleaning and use Chevron gas for one tank full. Do some high RPM highway ran and see does it improve.

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