Question about 1988 Chevrolet S-10

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S-10 blazer 4x4 idles fast

1988 S-10 Blazer 4x4 2.8 idles fast at all times.

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  • mike loshbough
    mike loshbough May 11, 2010

    check for vacuum leak under the throtle body

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  • 14 Answers

Idle control valve

Posted on Mar 06, 2009

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I need a vacuum diagram for a 1988 Chevrolet S-10 Blazer, 4X4 2.8L 6 cylinder.


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Fig. 44: 1989 2.8L TBI engine - federal altitude



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Fig. 46: 1989 2.8L TBI engine - California



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Fig. 47: 1989 2.8L TBI engine - leaded fuel export without catalyst

Hope help with this (remember rated this).





May 24, 2010 | 1988 Chevrolet S-10

1 Answer

What are the timing specs for a 1991 chevy s10 blazer 4x4 4.3? changed timing chain and gears and timing is off. got marks together but still won't crank.


the timing spec is 0degrees at idle, also heres adiagram for timing chain, check oil preasure switch connection and wiring to control module.hope this helps.ed9c50e.gif

Feb 19, 2010 | 1991 Chevrolet S-10 Blazer

1 Answer

I have a 1984 (4x4)S-10 blazer.I want a V-8 not crud V-6.


find a 1988/89 s10 4x4 with a 4.3 auto a small block will bolt up to the same tranny and tranfer case in the ones ive done it worked out great .most of them have over drive (700r4) tranny most any junk yard can help you out ebay has some kits on it .

Jul 12, 2009 | 1984 Chevrolet Blazer

1 Answer

Starts and runs rough with black smoke as flooded


when you replaced the plugs/wires. Did you do the cap and rotor too
Also have your timing checked

Jul 10, 2009 | 1988 Chevrolet Blazer

2 Answers

Distributor cap and rotor firing order 4.3 jimmy blazer 4x4


1-6-5-4-3-2, clockwise


Please take time to rate this fixya

May 11, 2009 | 1991 Chevrolet S-10 Blazer

1 Answer

My 1988 s10 blazer 4x4 2.8 idles fast at all times.


is it carb or EFI? Carb shouldhave adjustment screw

Mar 06, 2009 | 1986 Chevrolet S-10 Blazer

1 Answer

1999 s-10 blazer 4x4 no worky when button is puhed, but lights up


change the vacuum actuator it is located under the battery

Dec 27, 2008 | 1985 Chevrolet S-10 Blazer

1 Answer

Why is my 1994 Chevy S10 Blazer lugging? motor shakes and lugs.


Could be vacuum leak or bad ignition wire(s).

I had a similar problem on my "93 Ford probe. The engine idled pretty rough with shakes, Turned out to be a head gasket leaking engine coolant into the cylinder during low rpm's. At fast rpm's it was fine becuase the internal cylinder pressure was greater than the hot coolant pressure & would prevent the coolant from leaking in.

A friend has the same problem with his "94 Blazer 4.3 L, throttle body injection, manual tranny. He hasn't fixed it yet, It started a few weeks ago & is getting worse. His gets a fast idle with hiccups which causes the engine shake. He already checked the EGR valve. He also has a severe exhaust problem, Not oilly but very gray & terrible smelly, but only when the fast idle problem happens. THis fast idle hiccup problem starts when the engine is warmed up.

Nov 19, 2008 | 1994 Chevrolet S-10 Blazer

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