Question about 1999 Chevrolet C1500

2 Answers

Misfire & power loss

  1. Engine (5.3) on my 2000 silverado misfires and losses power when on hills. Problem goes away when I step on the the gas pedal and the tranny downshifts (higher rpm). Works fine on flat grades and lower speeds (city driving). Vehicle also shakes and shudders when this problem occurs.

Posted by on

  • 1 more comment 
  • hunterlyt Aug 25, 2008

    My 99 Chevy Silverado has done the same thing for the past 2 years. I have taken it in 3 times. Each time they say there is nothing wrong with it.

    They have cleaned the fuel system twice and done a general tune up once.

    Now it is having problems starting. I have to hold the key down for a long 5 seconds before it catches. I will say that when they cleaned the fuel system it fixed it for about a month. I'm not sure what this means.

  • hunterlyt May 11, 2010

    I have changed the fuel filter twice. The last time was about 2 weeks ago and I'm still having the same problem. Do you think that the fuel injectors could be causing both problems or just the misfires and loss of power?

  • Anonymous Mar 12, 2014

    with reference to a 2011 Hyundai i20, 1.6l. vehicle just serviced at dealership. intermittent 'shuddering'noise while driving at front RHS. occurs at any time- road surface is ruled out . occurs at any speed, anytime and then goes away. thanks .vinay

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

No mine had trouble starting it was just the fuel regulator valve

Posted on Jan 26, 2009

Maybe its time to replace your fuel injectors or fuel filter ?

Posted on Nov 02, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have 1996 mustang v6 the car shakes loss of alot of power the car barley goes up hill if im taking off i have to push it to the floor so the car can start rolling please help me man


that car has a misfire check to see witch cylinder has the misfire by removing the spark plug wire while its running you should hear the change in the engine

Feb 26, 2015 | Cars & Trucks

1 Answer

What is a misfire on engine control system?


The computer will set a misfire code when it sees a lag in the signal from the crankshaft position sensor. If the crank's rotational speed suffers a power loss from a cylinder not putting out as much power as the others, the computer will set the misfire code for that cylinder, or if it cannot determine which cylinder is not producing the expected power, it will set the code for a random misfire.

Troubleshooting misfire codes generally involves checking gas, spark, and compression. One of those, or the lack of it, is usually responsible for misfires.

Aug 03, 2014 | 2006 Buick LaCrosse

2 Answers

Troubleshooting a rough idle


Have the engine computer scanned for trouble codes. Misfires are from loss of fuel, spark, or compression. Check the fuel pressure, check that all spark plugs are getting spark, and if all good so far, test engine compression. Low compression in a cylinder will cause misfires and loss of power.

It could also be a vacuum leak- a loose or cracked vacuum hose or an intake gasket leak.

Jul 27, 2014 | Dodge Stratus Cars & Trucks

1 Answer

Why does it lose power going up hill and fine on level ground


if the transmission dont slip that means the engine lacks power.
(torque)
this can be from forgetting to do tune ups>? every 60k miles. or per the operators guide, some cars need spark plugs every 30k did you RTM read the manual yet>? please do.
in order of likely (not physics)
bad spark (misfire) induced low power.
bad fueling lean
bad fueling too rich. (more misfire spark plugs turn black (tips)
bad engine. (compression loss)
the rare CAT melted, (inside) and getter worse.

to solve a riddle we do tests. simple tests with simple tools.
do you want to guess or test. it's your call.

Jun 27, 2014 | 2003 Hyundai Santa Fe

1 Answer

2003 gmc jimmy on hills loses power check engine blinks then stalls upon restart performs great runs well on flats and even not steep hills .


when engine light blink it is only one thing.......misfire you could have P0300,P0301 and so on
P0300 is multiple misfire
P0301 is cylinder no 1 misfire,the last number tell you the no cylinder
hope it helps

Mar 24, 2014 | 1995 GMC Jimmy

1 Answer

Spark jumping from coil pack causing the engine to miss


Hi there:
Misfire is a common driveability problem that may or may not be easy to diagnose, depending on the cause. A misfiring cylinder in a four-cylinder engine is, pardon the pun, hard to miss. The loss of 25 percent of the engine power output is the equivalent of a horse trying to run on three legs. The engine may shake so badly at idle that it causes vibrations that can be felt in the steering wheel and throughout the vehicle.



Basically, it's one of three things: loss of spark; the air/fuel mixture is too far out of balance to ignite; or loss of compression. Loss of spark includes anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. Causes include worn, fouled or damaged spark plugs, bad spark plug wires or even a cracked distributor cap. A weak coil or excessive rotor gas inside a distributor would affect all cylinders, not just a single cylinder.


Lean misfire can occur when the air/fuel mixture is too lean (not enough gasoline in the mixture) to burn. This can be caused by a dirty, clogged or inoperative fuel injector; air leaks; or low fuel pressure because of a weak pump, restricted filter or leaky pressure regulator. Low fuel pressure would affect all cylinders rather than an individual cylinder, as would most air leaks. A leaky EGR valve can also have the same effect as an air leak. In fact, if a vehicle has one or more misfire codes and a P0401 EGR code, the fault is likely carbon buildup under the EGR valve.


Loss of compression means the cylinder loses most of its air/fuel mixture before it can be ignited. The most likely causes here are a leaky (burned) exhaust valve or a blown head gasket. If two adjacent cylinders are misfiring, it's likely the head gasket between them has failed. Also, if an engine is overheating or losing coolant, it's likely the head gasket is the culprit.

Intermittent misfires are the worst kind to diagnose because the misfire comes and goes depending on engine load or operating conditions. They seem to occur for no apparent reason. The engine may only misfire and run rough when cold but then smooth out as it warms up. Or, it may start and idle fine but then misfire or hesitate when it comes under load. Also, it may run fine most of the time but suddenly misfire or cut out for no apparent reason.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jun 18, 2012 | Ford Mustang Cars & Trucks

1 Answer

After check engine light on analysis probable causes indicated #1 missfire, EGR problems, car feels like out of power when step on gas, then it goes but missing here and there


I had a misfire problem with my 2004 mazda 6. mine was the V6 and it was the #5 that was misfiring. i cant imagine what the loss of power feels like if the #1 is misfiring, but i replaced my ignition coil. I cant be too sure what the 4 cyl engine block looks like, but if you have the v6, its gonna take some time to replace because youll have to remove the air intake manifold thing on top of the engine block to get to the #1, #2, #3 pistons.
good luck!

Sep 01, 2011 | 2004 Mazda 6

1 Answer

I am having ongoing problems with the truck miss firing and rough running. Timing is ok, replaced cap and rotor,coil. It still starts rough,idles rough and misses when at cruising speed,although it seems...


Misfire is a common driveability problem that may or may not be easy to diagnose, depending on the cause. A misfiring cylinder in a four-cylinder engine is, pardon the pun, hard to miss. The loss of 25% of the engine's power output is the equivalent of a horse trying to run on three legs. The engine may shake so badly at idle that it causes vibrations that can be felt in the steering wheel and throughout the vehicle. The engine also may be hard to start and may even stall at idle, depending on the accessory load (air conditioning, headlights and electric rear defroster, for example).

When misfire occurs, performance suffers along with fuel economy, emissions and idle quality. And, when a misfiring vehicle is subjected to an emissions test, it will usually fail because of the unusually high levels of hydrocarbons (HC) in the exhaust.

What causes a cylinder to misfire? Basically, it's one of three things: loss of spark; the air/fuel mixture is too far out of balance to ignite; or loss of compression. Loss of spark includes anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. Causes include worn, fouled or damaged spark plugs, bad spark plug wires or even a cracked distributor cap. A weak coil or excessive rotor gas inside a distributor would affect all cylinders, not just a single cylinder.

"Lean misfire" can occur when the air/fuel mixture is too lean (not enough gasoline in the mixture) to burn. This can be caused by a dirty, clogged or inoperative fuel injector; air leaks; or low fuel pressure because of a weak pump, restricted filter or leaky pressure regulator. Low fuel pressure would affect all cylinders rather than an individual cylinder, as would most air leaks. A leaky EGR valve can also have the same effect as an air leak.

Loss of compression means the cylinder loses most of its air/fuel mixture before it can be ignited. The most likely causes here are a leaky (burned) exhaust valve or a blown head gasket. If two adjacent cylinders are misfiring, it's likely the head gasket between them has failed. Also, if an engine is overheating or losing coolant, it's likely the head gasket is the culprit.

Intermittent misfires are the worst kind to diagnose because the misfire comes and goes depending on engine load or operating conditions. They seem to occur for no apparent reason. The engine may only misfire and run rough when cold but then smooth out as it warms up. Or, it may start and idle fine but then misfire or hesitate when it comes under load. Also, it may run fine most of the time but suddenly misfire or cut out for no apparent reason. Intermittent misfires can be a real challenge to diagnose, so let's start with a steady misfire in one cylinder before moving on to intermittent misfires.

Hope this help.

Mar 25, 2010 | 1989 GMC Sierra

2 Answers

I have a 2002 Ford Explorer V6. Last night I


I somewhat agree with other solutions on this page. I agree that what you are describing is a severe misfire, however there are MANY possible causes for a severe misfire other than just the spark plugs...I recommend diagnosing the CAUSE of the misfire before spending any money "GUESSING" and replacing a bunch of parts.

Also, a code P0300 is a "RANDOM MISFIRE" code which indicates that there is definately more than one cylinder misfiring. Your computer MAY display this code, however, a SINGLE cylinder misfire can also cause a loss of power and the check engine light to flash.
You may just have something like a bad coil on one cylinder that needs to be replaced. This is why PROPER diagnosis is recommended.

Jun 30, 2009 | 2002 Ford Explorer

1 Answer

Engine misfires, power loss when warm and under load


What grade of you do you have ? must be 5/30 fully synth or it breaks down when hot and makes for a misfire.

Apr 02, 2009 | 1998 Isuzu Trooper

Not finding what you are looking for?
1999 Chevrolet C1500 Logo

393 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

63801 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 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...