Skip the auto shop - Our mechanics make house calls

Q: Low idle after cleaning carb

asked by on

Hi, I hope to seek some advice... I cleaned my car's carb with carb cleaner, removed the idle air control valve and cleaned it as well (cleaned the parts with my negative terminal disconnected). After cleaning the carb and started the car, I noticed that the idle speed gets low which starts at around 1300 and drops at around 800 within a second after starting. Hope to hear some advice from you guys and thanks in advance!

My car has 305000 miles.
My car has a manual transmission.

Firstly, you’ll want to verify that you cleaned the throttle body thoroughly since carburetors have not been used for years. The fact that you cleaned the carburetor and disconnected the battery means that the computer will need to relearn the idle again.

To do this you’ll need to warm the vehicle by holding the throttle part open for at least 2 minutes. Let it idle with all of the accessories off for 2 minutes and then turn on the A/C and put it on medium blower speeds and let the car idle for 2 minutes.

By doing this the computer should have relearned the idle now. An idle of 800 RPMs is a good speed for the idle to be at as long as you do not have stalling when you decelerate.

If you need help with getting this done, consider YourMechanic, as one of our mobile technicians can diagnose your idling issue and help you make the necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car battery light constantly goes on and off.

Hello. The fact that the car struggles when you take the jumper cables off suggests that the battery is not able to maintain a charge on its own. I would recommend checking the alternator and the voltage regulator as these...

Q: Car only runs when it is jump-started - 1995 Cadillac Fleetwood

Hi! The first thing to check is that the battery cables are clean and tight and not corroded. They should be tight enough that you can not move those connections by hand. Check both at the battery and down where...

Q: Engine shuts off, white smoke coming out - 2001 Toyota MR2

Hello. White smoke (steam) makes me think that this is antifreeze. Check to be sure your radiator coolant level is not dropping. If so, could have internal leak to cylinder. A misfiring cylinder is caused by mechanical problems or an...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...