Question about 2002 Chevrolet S-10

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2002 4.3 vortex chevy got a rough idle but smooths out at 1500 rpm and has a miss fire code changed intake gasket

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Check the distributor gear. Is it a random misfire code? I am fighting this issue myself. My truck eats up the distributor gear and I get random misfire codes and Cam to Crank positioning sensor codes, all related to timing issues.

Posted on Jul 31, 2010

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I would replace the spark plugs and plug wires. It sounds like you have a bad plug wire but replacing all of the plug wires and all the plugs should resolve your issue.

Posted on May 09, 2010

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I have a 95 mustang v6 that I got as a project. It had blown was gasket and ran rough at idle with lack of power. I redid heads and gaskets etc it runs great and has good power but still idles rough at...


Idling is too slow at 500 rpm.......think about at least 650 rpm to charge the battery and keep up inertia for better take-off power.
Find out how to increase rpm,whether it's a screw-stop adjustment or a timing problem. don-ohio (:^)

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5.3 liter Chevy engine #1 Cylinder not firing at idle


My opinion...

Year? Miles?

There's no way I'd dive into a "HEAD GASKET"
diagnosis without pressure testing the cooling
system and (wet/dry) COMPRESSION testing
the whole engine...

Even if it is a "HEAD GASKET"... the entire engine
might be ready for a REFRESH... and tossing a new
Head gasket into a TIRED ENGINE not insubstantial
(a lot of wasted time & money)...

Come back with some compression numbers...

but don't bother with any of this if your engine oil has water in it.

(in my opinion)

Carnac the Magnificent

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P1299 code after replacing the plenum gasket. Rough and sometimes erratic idle.


This code indicates a large vacuum leak. You can sometimes find a leaky gasket by spraying ether on the gaskets while the engine idles. If the engine changes speed while the gasket is sprayed, you have found the leak.

Jun 24, 2017 | 1999 Chrysler 300M

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When my 2002 Chevy Suburban is first started, it idles rough and starts missing (cold idle). The "check engine light" is now on.


spray carb/choke cleaner around intake gasket mating surface to heads if it changes rpm of motor you have a bad intake gasket. my 03 did this 2 wks ago. they have a plastic gasket set for $39.00 (felpro) or you can purchase the steel felpro set for $80.00. If your keeping truck buy the steel as they are heavy duty and highly recommended. Maybe get a code scan and see what it has to say; ( lean, misfire on 1 or 2 bank )

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1990 chevy 1500 4X4 5.7L with 292K miles. Engine runs rough as if missing. Changed plugs, wires, dist cap, rotor button, used CRC throttle body cleaner, but still doesn't run smooth at idle or higher...


With that kind of symptoms you should be displaying a check engine light have the codes extracted and get back to me let me know what codes and I will give you a better idea of what is wrong with your vehicle.

Jan 10, 2010 | 1990 Chevrolet Corvette

1 Answer

2000 Chevy s10 2.2L very rough idle at low rpm


run a fuel pressure test, if that checks out fine it may be a faulty coil pack or ignition control module

Jul 28, 2009 | 2000 Chevrolet S-10

1 Answer

95 s-10 blazer idles rough


CHECK FOR A LEAKING INTAKE MANIFOLD GASKET, USE A CAN OF CARB SPRAY AND SPRAY AROUND THE TOP OF THE ENGINE, IF U HIT ON A LEAK U WILL HEAR THE ENG CHANGE TONE AND IDLE RPM.

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1 Answer

98 chev 5.7 #3and#6 clys are missing at ilde to about 2500 rpm


I would test for a leaking intake manifold gasket. WITH A WATER SPRAYER , and the engine running at operating temps and at idle, spray some water where the intake meets the cylinder head. If you hear a little SUCKING SOUND, and the engine smooths out temporarily, thats it Hope this helps

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