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Power surge when heater motor is on

When heater is turned on while truck is idling, power surging sometimes results, as well as when the truck is being driven while heater is on, a slight erratic power loss and accompanying noise happens.

1 Answer

Daniel Mc Entee

Toyota Master 1,449 Answers
Posted on Dec 30, 2013

Daniel Mc Entee

Toyota Master

Joined: Oct 21, 2012

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Check the drive belts may need tightened.

5 Related Answers

Anonymous

9 Answers
Posted on Aug 13, 2008

SOURCE: slight rough idle, an occasional

sounds like TPS or mass air flow sensor, what year of car

Anonymous

12 Answers
Posted on Feb 07, 2009

SOURCE: rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Anonymous

5 Answers
Posted on Aug 11, 2009

SOURCE: S80 engine surge at idle

You could have a bad or contaminated Mass Air Flow (MAF) sensor. You can get a used one online for less then 100. You can also purchase a can of MAF sensor cleaner at a local auto supplies store and clean it. It located right at the air filter housing.

Anonymous

399 Answers
Posted on Nov 15, 2009

SOURCE: 1990 geo metro engine surges up and down when

hi sounds like your engine is surging due to incorrect mixture now your idle screw is on the thottle cable were it connects to the carb and the mixture screw is on the carb body as an approx guide turn the mixture screw fully in then out two and a half turns that should help but y may need to fine ajust later

honeymokey

3113 Answers
Posted on Jan 23, 2010

SOURCE: Our 2001 ford focus when it idles it surges

Check the pcv hose for leaks at the intake manifold. Common problem.

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1answer

1991 GMC C1500, 5.7 liter 350. Why is my A/C and heat are causing my engine to surge?.

If the operation of your A/C and heat is causing your engine to surge in your 1991 GMC C1500 with a 5.7-liter 350 engine, there could be a few possible causes for this issue:

Engine Load: The A/C and heat systems place an additional load on the engine, especially when the compressor engages. This extra load can affect the engine's idle and cause surging. It's possible that the engine is not able to handle the increased load, leading to fluctuations in RPM.
Idle Control System: The idle control system, including the idle air control valve (IAC), may be malfunctioning or not compensating properly for the increased load when the A/C or heat is turned on. This can result in unstable idle and engine surging. The IAC valve may need cleaning or replacement.
Electrical Issues: Faulty electrical connections, such as loose or corroded wires or connectors, can cause intermittent power supply to the A/C and heat systems. In turn, this can lead to fluctuations in engine performance, including surging.
Vacuum Leaks: Check for any vacuum leaks in the A/C and heat system components, as well as the engine's intake manifold and vacuum lines. Vacuum leaks can disrupt the engine's air-to-fuel ratio, leading to unstable idle and surging.
A/C Compressor Issues: The A/C compressor itself may be malfunctioning, causing excessive drag on the engine. This can result in surging when the A/C is engaged. A faulty clutch, compressor bearing, or internal component may be the cause.
Engine Performance Issues: Other underlying engine performance problems, such as ignition system issues, fuel delivery problems, or worn-out engine components, can contribute to surging when the A/C or heat is in use.

To diagnose and resolve the issue, it is recommended to consult a qualified mechanic or an automotive technician who can perform a thorough inspection of your vehicle. They will be able to assess the specific conditions and components involved, perform necessary tests, and identify the root cause of the surging problem.

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Jul 10, 2023 • GMC Cars & Trucks

0answers

01 volvo s80 t6 surges at idle. Tach remains at 7500 rpms but you can notice the surging by the dash lights flickering and sometimes a noticable jerking motion

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Be the first to answer Nov 12, 2017 • Volvo Cars & Trucks

0helpful

1answer

I have a 1998 buick skylark 3.1 engine. why would the engine have high idle and surge, and when cruise control cable disconnected from throttle body idle returns to normal

Check the timing. Sounds like its off.

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Jun 20, 2017 • 1998 Buick Skylark

0helpful

2answers

This engine has a surge; AT 35-45mph,it's a bit more prounounced, not as bad, but still there at 60mph. As the tach goes up some, then down, so does the motor, up then back down, etc.Any ideas?

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Feb 09, 2016 • Cars & Trucks

2helpful

1answer

1. no service codes 2. engine starts perfect 3. smooth power at all speeds 4. when idling, in park or drive the engine has a cyclical engine surge. The surge rpm is equal to fast idle. The repeating...

Idle air control motor. Clean it or replace it.

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Mar 12, 2015 • 1997 GMC Safari

0helpful

1answer

Idle surges 1996 Nissan Maxima from 800 to 1800 rpm

could be a dirty throttle body or the idle control motor

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Mar 24, 2012 • 1996 Nissan Maxima

0helpful

1answer

Got a 99 Nissan Altima 2.4, t-chain broke... replaced head and all t-components... start up surging idle and whistling off idle... engine runs smooth and great power off idle

the surging and whistling sounds like there might be a vacuum leak that is causing this.recheck all vacuum lines and surfaces were this is a gasket that seals a vacuum source.smooth running and good power off idle suggest this leak only affects the motor at a low(idle)rpm.

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Apr 14, 2011 • 2005 Nissan Altima

6helpful

1answer

1990 geo metro engine surges up and down when stopped..... prevous owner told me he turned the idle down. So, is the surging a direct result of idle adjustment or something else? ...and where is the idle...

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Nov 15, 2009 • 1990 Geo Metro

3helpful

3answers

Low rpm's in idle when heating/cooling system is on & surges.

Check your EGR or your Idle control Valve. This can cause a problem with your irratic idling

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Apr 17, 2009 • 1995 Ford Explorer

1helpful

2answers

Rough idle / engine surges until power is applied

Sounds like a possible vaccume hose leak?

Read full answer

Feb 07, 2009 • 1997 Chevrolet Astro

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1991 GMC C1500, 5.7 liter 350. Why is my A/C and heat are causing my engine to surge?.

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Power surge when heater motor is on

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Related Questions:

1991 GMC C1500, 5.7 liter 350. Why is my A/C and heat are causing my engine to surge?.

01 volvo s80 t6 surges at idle. Tach remains at 7500 rpms but you can notice the surging by the dash lights flickering and sometimes a noticable jerking motion

I have a 1998 buick skylark 3.1 engine. why would the engine have high idle and surge, and when cruise control cable disconnected from throttle body idle returns to normal

This engine has a surge; AT 35-45mph,it's a bit more prounounced, not as bad, but still there at 60mph. As the tach goes up some, then down, so does the motor, up then back down, etc.Any ideas?

1. no service codes 2. engine starts perfect 3. smooth power at all speeds 4. when idling, in park or drive the engine has a cyclical engine surge. The surge rpm is equal to fast idle. The repeating...

Idle surges 1996 Nissan Maxima from 800 to 1800 rpm

Got a 99 Nissan Altima 2.4, t-chain broke... replaced head and all t-components... start up surging idle and whistling off idle... engine runs smooth and great power off idle

1990 geo metro engine surges up and down when stopped..... prevous owner told me he turned the idle down. So, is the surging a direct result of idle adjustment or something else? ...and where is the idle...

Low rpm's in idle when heating/cooling system is on & surges.

Rough idle / engine surges until power is applied

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1991 GMC C1500, 5.7 liter 350. Why is my A/C and heat are causing my engine to surge?.

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