Question about Chevrolet Suburban 1500

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When a/c is on idle it does not blow that cold but when push gas it gets colder.

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Posted on Jul 14, 2010


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1 Answer

Car starts and blows black smoke and use a lot f gas and want idle.

Your car is running very rich, meaning the cold start sensor may be blown. a car uses a sensor to see how cold the engine is as the colder the engine the more fuel it needs.

Mar 24, 2015 | Cars & Trucks

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When I start my grand marquis 2003, I will turn on the ac and I will hear a click. Then like thirty seconds later I will hear another click. My problem is that my ac blows hot then I hear a click and it...

The a/c compressor is cycling on/off this will happen when low on refrigerant or not enough air flow across evaporator 1st check system by rolling windows down place blower fan on highest setting hold throttle just above a idle 1200-1500 rpm"s if still cycling then open hood and find a black can it could be silver at firewall is the pipe coming from inside the car cold about 45 degrees if not system is low. if cold check cabin air filter it is pulled if equipped

May 09, 2014 | Cars & Trucks

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Suburban overheating and air conditioner blowing hot

If you have a viscous fan hub have it replaced as it is not working. The problem you have is that the engine is not driving the fan to draw air through the radiator when idling so the engine overheats . When moving the air flow from driving cools the radiator and so the temp goes back down. If you have electric fans have the codes read to find the fault or check why the electric fans are not working.

Jun 17, 2013 | Chevrolet Cars & Trucks

1 Answer

Heater blows cold air at idle

It sounds like your heater valve may be sticking. Try watching the valve, which is located behind the engine (two tubes etc
if you need a VAG diagnostic tool you can click here: VAG diagnostic tool

Nov 09, 2012 | Cars & Trucks

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I have 1999Chevy suburban with 6.5 turbo diesel idles up and down and when driving the gas pedal is real touchy Wat is the problem and were do i locate the problem

Check the help links related to this problem.Click the link below to go through its troubleshooting procedure :-----Idles rough and quits when gas pedal is pressed less?
Car won't start without hitting the gas pedal?
-------Complete loss of brake pedal then all gets normal?
------Car dies when gas pedal is pressed?
--------Pushing on the gas pedal, but the car slows down? Gas pedal to the floor and the car slows down?


After replacing brake rotors and pads, brake pedal remains on floor?


accelerator pedal sensor?


For rough idle issues and problem troubleshooting,go through the help links provided below :----- van idles rough?

will not idle when cold?

runs lean and idles rough?

Engine stumbles coming off idle when warm?

Erratic idle on car?

Low idle when cold out side?

Idle Air Control (IAC) Valve Replacing?

Engine quits at idle?

Car overheats and Air blows hot at idle?

While stop engine idles like cylinder missing?


This will help.


Mar 01, 2012 | 1999 GMC Suburban

1 Answer

Is the idle air valve an acceleration problem? It started accelerating it self now that its getting colder. Is it like the choke in older models?

No to both questions. The idle valve is only for idle control, letting in more or less air as idle conditions warrant, to keep engine at proper idle RPM. The old choke would reduce air supply on a cold engine to allow starting with a richer gas mixture. That function is taken over by the computer in injected cars by allowing longer injector pulses to give richer mixtures in cold engines. Once warm, the 02 sensor controls fuel trim through the computer.
By "accelerating itself", do you mean your idle is higher now that it's colder outside? I suppose it's possible if the idle valve is out of calibration, it might cause that. It is computer controlled, so proper diagnosis of the idle control valve requires a multimeter. The throttle position sensor should also be looked at for a high idle. Good luck.

Nov 05, 2011 | 1989 Oldsmobile Cutlass Ciera

2 Answers

When driving, heater blows warm air. When idling, cold air.

check your anti-freeze level, I'd bet that you're a little bit low!

Dec 15, 2009 | 2001 Mazda MPV

1 Answer

My heat blows really hot when I push on the gas pedal but when I'm idling it blows cold

you need to flush your heater core with a water hose and change your thermostat

Oct 02, 2009 | 2002 Jeep Liberty

1 Answer

Engine idles high when first started after tune up and takes long for kick down

Hi edsan 58,

Most gas injected engines run at a higher speed when started from cold....It's the cold start application working....As long as the idle speed returns to normal within a minute or two....longer when the weather is colder.....nothing to worry about

Regards Johngee10

Sep 06, 2008 | 1999 Chevrolet Express

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