Question about Cars & Trucks

Open Question

I have a 99 Chevy silverado the problem is the check engine light keeps coming on saying # 4 cylinder miss fire have had it checked has compress and is firing Engine will lose power and is sluggish especially over 30mph Any ideas

Posted by on

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Miss fire cylinder 4 1998 chevy metro lsi


check the injector for that cylinder as the electrics is not the only thing to cause a misfire.. Put the injector in another cylinder and see if the misfire has moved

Mar 01, 2014 | 1998 Chevrolet Metro

1 Answer

Toyota


I think you have burnt valve seat or head gasket either cylinder head has to be removed

Nov 23, 2013 | Cars & Trucks

1 Answer

My 1999 silverado has a 4.3 vortec engine an keeps burning up distributor caps an rotor buttons it has a miss in it when your driving it and your re barely pressing the accelerator the code says it has...


A lot of miles could mean a worn cam lobe..I recommend a compression check..make sure you are using OEM spark plugs for sure..and the correct battery..Some parts stores have weak parts also that has happened to me before and it drove me crazy..also racing spark plugs or wrong plugs will cause incorrect fire and it will force the engine to miss but will still run.I really need to know how many miles are on the engine and if it has correct plugs or not...Metalpoet

Sep 20, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

I have a 2001 ford taurus ses with a 6 cyl 3.0L DOHC engine. Getting error codes P0304,P0305 and P0306 from check engine light. Light alternates between flashing and steady. Lots of hesitation and...


Codes say Cylinder 4, 5 & 6 are not firing. This could be a spark issue or a fuel issue or a mechanical engine failure. Is compression zero? Did they use a compression tester?

Aug 02, 2011 | 2009 Ford F-150

2 Answers

Check engine light is on, they say multiple miss fire in cylcinder 6. but no one can find the problem van runs great


first do a cylinder compression test on engine to verify good engine compression this should be around 110psi to 175 psi check for vacuum leak, intake port for #6 cylindermay be leaking air, or also check coil for that cylinder, if wire and spark plug have already been changed, last replace fuel injector for that cylinder.

Jan 24, 2011 | 1996 Dodge Caravan

1 Answer

My 5.3 02 silverado has low compression and is miss firing


Any engine that has low compression indicates worn internal parts. $$$$ The usual suspects are worn piston rings. Have you checked all 8 cylinders? If so, are they all losing compression, or just certain cylinders? If you have access to a garage, do a compression check on all 8, you may also want to get a cylinder leakdown test, again, on all 8 cylinders. You can then decide what course of action would be best. Good Luch!

Jul 06, 2010 | 2002 Chevrolet Silverado 1500

2 Answers

1997 Chevy Silverado 1500 4x4 will not start. Getting spark checked all fuses, changed rotar - spark plug wires,


Have you checked the fuel pressure? Fuel pumps are a common failure item on those trucks. Pick up a cheap fuel pressure gauge and hook it up to the shrader valve on the fuel rail. With the ignition on and you should have 55-65psi. Even if it's a few psi below spec it could stop the engine from firing.Once you determine the fuel pressure isn't adequate make sure you have a good power and ground at the fuel pump. If that checks out, time for a new fuel pump module. I recommend only replacing it with an AC delco unit, I've heard bad stories about aftermarket replacements.
You could also spray some carb cleaner or starting fluid in the throttle body and crank the engine over. If it runs for a few seconds after spraying starting fluid in you know you have a fuel delivery problem.

Mar 14, 2010 | 1999 Chevrolet Silverado 1500

1 Answer

Engine misfiring cylinder #3


Hi there;
I have run into an issue with these engines miss-fireing on #3 before.
You may want to have you tech check the miss-fire count for #3 & #7 on his/her scanner, THe distributor cap on these engines is made so the spark for #3 crosses over the path of #7 & they sometimes mix & become one. What happens then is they may be fooled by a spark coming through the wire if on a test lead but won't send the spark to the cylinder. The spark always goes to the easieat place so when cyl.#3 is ready to fire it is easier for the spark to go to #7 & vice-versa, So you tech will see a constant miss-fire on #3 & an intermitant missfire on #7. they can ceck the cap by pulling #3 plug wire off the distributor cap while the truck is running & there will be no spark, if he puts #3 back on & pulls #7 off there will be no spark there. the computor will only set a #3 miss-fire code because that is the cylinder that miss-fires the most.
If they find that is O/K you will want to have them do a compression test. If they find the compression is conciderably lower on cylinder #3 than the rest the camshaft theory is plausable.
The next step will cost you some money but it will tell you if you have an injector issue. You will have to pay you tech about 3.0 hrs to do this & you can just have them replace the #3 injector & hope it works. But they are around $200.00 rebulit so thats alot of money to throw at a hope. You'll need to get them to swap the #3 injector with the injector from one of the other cylinders then run the engine. if the miss-fire moves to the other cylinder you know you have an injector issue.

I hope this helps, Good luck, please let me know how you make out.
Farrout!

Mar 19, 2009 | 1999 Chevrolet Tahoe

1 Answer

99 Chevy 4.3 2 cylinders don't fire (all cylinders have spark)


Sounds like your computer is fried. Check prices at your local recycling yard or EBAY. Ive seen this happen on other makes and models as well, and its always been the computer...

hope this helps!

Feb 26, 2009 | 1999 Chevrolet Silverado 1500

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

Related Topics:

36 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

75807 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...