Question about 1986 Chevrolet Chevette

1 Answer

Car went from low idle to fast idle out of the blue

Came home during a snowstorm and all of a sudden the idle was too fast. we have rechecked that all the timing is in the right position. we tested the controls best we could with a vacum tester. car idles fine with vacum lines being plugged for timing, but as soon as you reconnect the vacum system it revs way to high approximately 1600rpm at idle. carb screw is backed all the way off, unsure of what is causing the problem. ken

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 33 Answers

Check the choke and make sure it is functioning properly

Posted on Jan 10, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2004 Nissan Altima 3.5L BATTERY LIGHT went on during 15 minute drive. Next day car "died" while idling after a 20 minute drive. BRAKE WARNING LIGHT & BATTERY LIGHT on prior to full electrical failure.


Start with checking the alternator voltage with a multimeter. With the car off check the voltage in the battery which should be holding 12v charged less if flat of course then start the car and test the battery again. If the alternator is good you should be getting a reading of 14 to 14.5 v if it's the alternator it'll A) not put any charge into the battery or B) be a very low voltage being anything under 13.5 v

Sep 30, 2016 | 2004 Nissan Altima

1 Answer

The car is all on normal condition until I filled the gasoline to the fuel tank (over the standard value) ,I left the gas station suddenly the speed goes down then the engine stopped , I try to ignition...


You overfilled the tank and screwed up the fuel vent canister. Usually the car will not run, dies while idling, or surges if you try to drive, also if you try to fill up again you might find it difficult to fill your tank fast because the canister is not venting the tank

Oct 21, 2013 | 1986 Mitsubishi Space Wagon

1 Answer

Car Brakes


Check the fluid level first, if it is not low then you need a master cylinder kit. If it is low then look on the back side of each tire, it will be easy to find the leak.

Dec 30, 2009 | 1995 Mercury Sable

1 Answer

I have a 99 gmc sierra 6.0(has 189,xxx miles) and I was stalled on hiway today, ran code p0300. had towed home and I replaced egr valve $185. now ran a code P0405 and will start and idle rough and kill...


CPoP0405 Chevrolet Exhaust Gas Recirculation Sensor A Circuit LowCode p0405 is EGR Sensor A Circut Low. I suggest you recheck your eletrical connections and make sure they are making good contact.

Oct 08, 2009 | 1999 GMC Sierra

1 Answer

Idle too fast at 2300 rpm


Yes your choke is sticking

Jul 09, 2009 | 1996 Isuzu Trooper

1 Answer

My 1995 Jimmy s torque converter only locks in during deaccerlation


check the fluid levels in the transmission fluid level dip stick in idle also wipe the stick and recheck it the dipstick is located on the left rear firewall usually a red locking tab .i am re-posting this as im not sure my last post went through

Jun 26, 2009 | 1995 GMC Jimmy

2 Answers

Bubbling during idling or low speed


you mean 70-80 kph? because in mph that is very fast! check your thermostat, and if its not a problem with the thermostat sticking , it may be a problem with your water pump

Apr 16, 2009 | 1999 Ford Crown Victoria

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

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

158 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

60867 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...