Question about 2003 GMC Sierra 1500

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Lost of power,idles fine, seems to have more power in cooler temps

My truck seems to have lost power, when it is cold it seems to run a little better, it idles fine but it doe's not have that kick like it use too.

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Try and clean out the throttle body, usually lots of buildup around the throttle plate. 

Posted on Jun 03, 2009

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It sounds like its over heating slightly but not enough to completely over heat it do you have enough coolant

Posted on May 27, 2009

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98 suzuki sidekick 1.6L several malfunction codes 0141 H02S circuit malfunction, 0335 CKP sensor malfunction, 0510 CTP Switch malfunction, and 1408 MDP sensor malfunction. Issues are bad fuel mileage


that is a 12vdc power problem.
the sensors are failing , many do to lost power. (12vdc electrical distribution power)
so use a voltemeter, i bet even at he cig lighter port the voltage drops
below 13.3v running, way below. infact.
are your battery terminals clean,
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My sons 88 Mighty max runs terrible at about 35 mph and up. Seems to run betterhe air temp is cooler, like 60's and lower. We replaced plugs/wires, cap/rotor, fuel pump, air/fuel filters, some que


Air is more dense at lower temperatures so the cylinders fill better and there is some evidence increased humidity also helps engines to run better.

Replacing stuff in the vague hope it will provide a cure can be expensive and very frustrating and is no substitute for proper checks and replacing only what proves to be faulty.

New plugs won't improve matters if the spark is really weak and a new fuel pump is really money down the drain if the pressure regulator is faulty or the injectors aren't spraying properly or the carb has some blocked jets or if the oxygen sensor is sending the wrong information...

It is best practice to always start with the basics - engine condition, timing, compressions, cylinder leakage and so forth. Your description indicates the engine is short of fuel or fuel that it can use but could equally be caused by a restricted exhaust. I once had a car just like that and it was a worn exhaust cam lobe that was causing the trouble.

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Engine starts , and dies. Only when weather is cold.


hello there
I looks like your oxygen sensor,Try to disconnect and then see what the car does?Let me know.You may need to adjust the fuel mixure,seem it is running a little rich that is why the car in idle goes up and down.
proporsche@yahoo.com

proporsche

Jan 09, 2012 | 1991 Porsche 911

1 Answer

Starts fine and the engine will idle then it will die from idle try to accelerate and it seems like its out of fuel replaced feul filter no change friend says its the catyletic converter but it happened...


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2 Answers

Service engine lite comes on... the code results is the engine is running too cool. Engine temperature running is about 175 degrees. I thought that the cooler the engine running, the better. Is this a...


computer and emission controls dont function properly until engine is at running temp. sooooo it may make your car run a little higher trying to warm it up at idle. just depends on car some act real funny about this type of thing. sometimes rpms might be 2000 at idle. it is bad coolant temp sensor. i would fix it.

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Car ran fine then on a long trip developed some loss of power now


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Sep 22, 2009 | 1991 Cadillac DeVille

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2004 crvautomatic high idle on cold startup 1600rpm takes 3 to 5


Hondas are famous for this, my accord does it. This is normal UNLESS it still idles high after normal running temp. has occured. Watch your temp. gauge when it reaches normal temp tap the gas a little bit if the idle drops then it is fine

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3 Answers

No Heat in 99 Taurus


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