Question about 1989 Chevrolet C1500

1 Answer

Idles rough when started and at slow speed acts like it has no power

Posted by on

  • 1 more comment 
  • Anonymous Aug 21, 2008

    Yes when i start my car it shakes really bad...then when i get to 55 mph it shakes really bad.

  • WMF1964 Sep 03, 2008

    has a miss when started, drive it and it clears up somewhat, let it idle and it begins to miss again. too many new parts to list...I HAVE RUN OUT OF THINGS TO REPLACE........SOMEONE PLEASE HELP.....THANKS VERY, VERY MUCH

  • Anonymous Apr 20, 2009

    i have a 2000 silverado with the exact same problems. cannot figure it out. it idles fine until i put it into drive or any gear. it then almost stalls, idles really low and shakes. when i try to drive it has absolutely no power, until i get to about 1500 rpm

×

1 Answer

Buy another vehicle

Posted on Sep 03, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Rough idle in drive, correct rpm


Car idle is rough Inspection Service & Cost A rough idling engine can be caused by a number of issues, some of them are serious while others tend to be minor, but the symptoms remain pretty much the same. The car will feel rough and bouncy when the engine is running. The car will also idle below its regular speed, display inconsistent RPMs and may produce a shaking, skipping or slipping sound when the vehicle is running.
While a rough idling engine may seem to be a simple inconvenience it often indicates a deeper problem within the engine. The vehicle should be inspected and repaired as soon as possible because small problems have a way of turning into expensive repairs. How this system works: The idle speed of an engine is basically the rotational speed the engine runs on when it is un-coupled from the drivetrain and the throttle pedal is not being depressed. The idle speed is measured in the revolutions per minute of the crankshaft.
When an engine is running at idle speed it generates enough power to smoothly operate equipment such as the water pump, alternator, and power steering but not enough power to move the vehicle itself. A passenger car will usually idle between 600 RPMs and 1000 RPMs. A properly functioning idle should run smoothly without skipping or slipping. Common reasons for this to happen:
  • Dirty Fuel Injectors: The fuel injection system injects fuel into the cylinders, which creates a mix of air, and fuel to ignite and burn. Fuel injectors have tiny nozzles to spray the fuel into the cylinder and they can become clogged over time. clogged or failing fuel injector creates a lack of fuel in the vehicle's engine. This can cause a rough idle, it can also cause symptoms such as slow acceleration or the car not feeling as if it has enough power. If the problem is addressed early, it is possible to clean the injectors, which will restore them to full function. If this condition is not addressed in a timely manner the injectors will need to be replaced. Incorrect Idle Speed: While the average idle speed falls between 600 to 1,000 RPMs, if your vehicle is experiencing a rough idle it could be due to an incorrect idle speed setting. A trained mechanic can easily adjust the idle speed, and it should stay at the proper speed. If an adjusted idle speed becomes inconsistent or changes at random intervals there may be a bigger problem that needs to be explored. Vacuum Leak: If the vacuum system has a leak, it can seriously affect the ability of the vehicle's computer to regulate the air to fuel ratio. This can lead to a rough idle and if the problem is not addressed the car may experience slow acceleration and a lack of power. Vacuum leaks should be inspected and repaired immediately. Incorrectly Installed or Damaged Plugs: Spark plugs are responsible for creating the spark that allows the vehicle to burn fuel. If spark plugs are improperly installed or malfunctioning, the idle speed can be affected. The vehicle's engine may vibrate or there may be slipping or straining sounds coming from the engine. Defective or Clogged Fuel Pump: A rough idle can be related to fuel delivery issues. The fuel pump, which is responsible for pulling fuel from the gas tank to the fuel injectors, can become clogged or defective. If this happens the engine will not get enough fuel, which can cause a rough idle, sputtering, stalling and even slow acceleration. Clogged Fuel Filter: A clogged fuel filter can cause similar problems. The job of the fuel filter is to screen out contaminants in the fuel, over time it will become clogged and need to be replaced. A rough idle is one symptom of a clogged fuel filter. Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. If this is the case, the problem will usually get worse as RPMs increase. Common culprits include the ignition control module, plug wires, coils, and spark plugs. Defective Airflow Sensor: A defective airflow sensor can be responsible for a rough idle. A mass airflow sensor detects the amount of air coming into the fuel injection system and sends that information to the vehicle's computer. The computer uses that data to deliver the proper amount of fuel to the air in the vehicle. Over time these sensors can malfunction or become dirty. One of the first symptoms of a malfunctioning airflow sensor is a rough idle. The car may also accelerate slowly and even stutter or stall as the problem progresses. Dirty Oxygen Sensor: Oxygen sensors measure how rich or lean the gases are as they exit the combustion chamber. Depending on the results, the amount of fuel entering the engine is adjusted by the vehicle computer. The ultimate goal is to maintain an ideal mixture that produces the lowest emissions. A dirty or failing oxygen sensor will usually trigger the check engine light and can lead to a rough idle, lower fuel efficiency and failed emission test.

Sep 28, 2016 | AC Cars & Trucks

1 Answer

2004 Kia Optima idles rough when AC on; idles fine when AC off -- what is the problem?


Putting on the AC causes power to be taken from the engine, and that is quite usual (unless it's taking excessive power but if there are no noises and it's working ok that's unlikely).
That will slow down the engine (similar to switching on your heated rear window whilst idling)
What you are seeing is the idle is probably a bit slow, and it's too slow with AC on. Have a diagnostic run to check idle speed and mixture at low revs.

May 08, 2014 | 2003 Kia Spectra

1 Answer

1983 s10 blazer low rough idle and trys to die when starting have to give it a little gas and put it into drive real quick then when slowing down keep foot on gas pedal as i also slow down with break pedal


Could be several things, a vac leak, dirty throttle body, or faulty idle air control valve.
The computer controls idle speed by how much air enters the throttle body thru the valve.
Usually a vac leak would speed up the engine unless it is causing the rough idle.

Jan 10, 2013 | Cars & Trucks

1 Answer

Slow idle at start, rough idle when shifting


The tuning and timing of the car must be reset. The slow speed tuning is so low that it goes down when the drive is selected.
So the timing of the engine and the correction for fuel to maintai the engine rhythm shoudlbe set to standard condition as per specification... refer you manual

Sep 24, 2010 | 1989 Ford F 150

2 Answers

92 Ford F150 4.9L. starts good, idles rough, dies at slow speeds


4.9 litre ?? you having a laugh its a 10ton truck engine not a pick up -global warming machine,remove the pump/sender unit and check the gauze filter also look inside tank for a something floating around ,i think the idles is not a related problem to the vehicle losing power but their is a possibility you could have a problem with the little vac operated thing on the fuel injector line that allows the fuel through only when the engine is running

Mar 15, 2010 | Ford F-150 Cars & Trucks

1 Answer

When I come to a stop my car dies and it takes several times to start it. It acts like its not getting gas and it did this when I had less than a quarter of a tank of gas and now it has 3/4 tank and it...


Here is the common cause of engine hesitation, surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of THROTTLE BODY cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

Aug 27, 2009 | 1997 Plymouth Breeze

1 Answer

Rough idle at startup and slowing from highway speeds!


sounds right but check mass air flow unit and clean it out before buying anything

Apr 05, 2009 | 1995 Chevrolet S-10 CA Edition

2 Answers

Rough idle / engine surges until power is applied


Sounds like a possible vaccume hose leak?

Feb 07, 2009 | 1997 Chevrolet Astro

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

Related Topics:

147 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

60960 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

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

Answer questions

Manuals & User Guides

Loading...