Question about Chevrolet Blazer

2 Answers

I installed a new longblock with new cap rotor wires and plugs at the same time upon starting it we have a random misfire check engine light starts to flash at 2000 rpm we checked for vaccumme leaks checked all wires with scanner on it shows misfire on cyl # 3 and 6 at idle no misfire shows

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Scholar:

    An expert who has written 20 answers of more than 400 characters.

  • Expert
  • 117 Answers

Have you checked the spark on those two cylinders? Also, make sure the wires are not hanging down near the exhaust manifold or laying across anything metal. Sometimes, even with new wires, you can get a bleed through where the spark escpes from the wire and shorts out somewhere on the engine. Giving that it doesn't do it at idle means that this could be a possiblity. The less spark it needs the better it runs, the more it needs the crappier it runs. Hope this helps.

Posted on Mar 17, 2011

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Sergeant:

    An expert that has over 500 points.

    Champion:

    An expert who has answered 200 questions.

  • Expert
  • 215 Answers

Misfire above idol can also be a fuel injector issue.

Posted on Mar 17, 2011

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

2000 trail blazier with random misfire,sulfur smell, glowing convertor. New cap,rotor button plugs,plug wires and convertor NO CHANGE ! ANY IDEAS ?


Is the check engine light lit ? Any DTC'S - diagnostic trouble codes ? What engine ? 4.3 L vortex . Leaking fuel pressure regulator under the upper intake manifold . Leaking fuel injectors ! Ignition timing problem . How does the engine run ? Who installed the plugs an wires ? are they right ? Fuel pressure leak down test, fuel injector balance testing . Check distributor drive gear an slop in the shaft . Did you have distributor out ? Is it in the proper position ? What cylinder is misfiring ? engine mechanical problem ! What do spark plugs look like ? fouled , soaked with fuel . Do a engine compression test .
The camshaft drives the distributor shaft which rotates providing a spark to the correct cylinder by way of the cap and rotor. The camshaft position sensor functions much like the crankshaft sensor previously described but provides only a 1x signal to the VCM. That is, for every 2 rotations of the crankshaft, there is 1 rotation of the camshaft. Note that the CMP sensor will not affect driveability. The sole purpose of the CMP sensor is to provide the VCM with the necessary information for the misfire DTCs.

Nov 10, 2015 | Cars & Trucks

2 Answers

Has p0300 code misfire cyl 2 and 3


If it was just cylinder 2 or 3, the code would be 0302 or 0303. Instead, you have random misfires (probably) such that you should be checking things that affect the whole engine. Vacuum leaks, bad plug wires, bad coil(s) or ignition module are most likely, but even clogged exhaust, O2 sensors and bad battery can cause these problems. Yes, a battery can be good enough to start your car but still be bad enough to affect performance. If I had to guess, I would start by testing the ignition module. Most parts stores can test this if you remove it and carry it to them.

May 04, 2015 | 1998 Chevrolet Blazer

1 Answer

Dodge stratus misfire, runs rough has random misfires in cylinder 1,3,and 5 and a vacuum leak, I,m not too worried about the leak unless it is related to the misfire


I WOULD REPLACE DISTRIBUTOR CAP AND ROTOR.MARK LOCATION OF ROTOR OR MAKE NOTE SO YOU CAN INSTALL NEW ROTOR IN CORRECT FIRING POSITION. IF THIS CAR HAS A LOT OF MILES I WOULD REPLACE DISTRIBUTOR CAP, ROTOR.SPARK PLUGS AND WIRES.REPLACE IGNITION COIL.CLEAN FUEL INJECTORS, FILL GAS TANK UP TO 3/4 TO FULL TANK OF GAS POUR CAN SEAFOAM IN FUEL TANK IT WILL FLUSH OUT THE FUEL INJECTORS WHILE ENGINE RUNNING OR DRIVING CAR. REPLACE FUEL FILTER. REASON I SAY DO A TUNE UP PROBLEM COULD BE MINOR FIX.COULD NEED TUNE UP.IF TUNE UP DONT HELP THEN YOUR PROBLEM IS DISTRIBUTOR OR THE CAMSHAFT SENSOR INSIDE OF DISTRIBUTOR.THAT WOULD SET OFF CHECK ENGINE LIGHT.BUT I WOULD SAY TUNE UP COULD FIX PROBLEM.

Aug 13, 2011 | 2000 Dodge Stratus

2 Answers

I have a 1997 chevy tahoe the problem is it trembles all the time and the check engine light comes on and i checked it it said random misfires


A random misfire code is usually a p0300 and this is usually caused by a clogged/restricted catalytic converter or exhaust system. Lets say this is a v8 if a certain cylinder wasn't firing it would be a p0301 or p0307 for example in which I'd suggest for you to inspect your spark plugs to see if they are fouled and then to test the circuit for a good spark by placing your plug wire with plug installed against the manifold and have someone crank the motor. A high voltage spark will be white or slightly light blue a weak spark wolud be an orange/reddish color which would denote a faulty plug wire/coil pack/ignition coil etc etc. A mechanic or shop with a dwell meter can cancel out each cylinder to determine if that's at fault but my money's on the cat.

Apr 23, 2011 | 1998 Chevrolet K1500

1 Answer

Had a random misfire truck would not start have replaced all wires cap rotor not even 6 months ago plugs as well can you help . thanks


The first thing that i would do is check your cap and rotor for corrosion. look on the inside of the cap and see if there is corrosion on the tips where the rotor sends electricity to. check the tip of your rotor button for wear and corrosion on the tip of the rotor. If thats all good make sure wires are not bad by purchasing a spark tester at your local parts store. Its only a few bucks and you hook it on to the spark plug end of the wire and it will spark if the wire is good. If they are good then check and make sure plugs arent fouled out and make sure the gap between the electrode and the tip is correct. About .045 is usually the spec for them. then if that is all good i would consider replacing the coil because if the coil has a short in it, it could possibly cause a random misfire.

Jan 03, 2011 | 2001 Chevrolet Silverado 1500

1 Answer

It is missing when i first start it and check


Hi:
It seems that your intermittent problem could be a cheap fix,and you can try a few things that might fix or eliminate the problem. Since the code pointed to the #1 cylinder misfire, You could change out your spark plugs and spark plug wires as a possible cause. If it doesn't fix it, they were 5-6 years old, and a new set isn't a bad investment. If the problem persists, then you are looking at a ignition coil, coil pack, distributor cap/ rotor,depending on your particular engine. Often if you have an ignition module failing, it will affect all cylinders misfiring, often randomly , so once you change your plugs and wires, have someone clear the check engine light, so if it comes back on ,you can check to see what the new code problem is...I hope you get a cheap fix!

Jan 24, 2010 | Nissan Pathfinder Cars & Trucks

1 Answer

Check engine light starts blinking going up a incline


You have a cylinder misfire. That is the only thing that will flash the check engine light. With the van running spray the plug wires with water. Watch and listen for arcing. If there is, replace that or all the wires. It is possible for new wires to be bad. Next check the cap and rotor buy spraying them with water, than removing and looking inside for signs of burning or anything that will hinder the spark. Last check the spark plugs for carbon tracking (small black lines in the porcelin), caused buy hair line cracks. If you dont find any thing, check it again. With no other codes it is very unlikley that anything else is causing the misfire.

Feb 04, 2009 | 2004 Chevrolet Express

1 Answer

Misfire on 3


Misfire on 3 could mean bad plug or bad wire...or the distributor cap has a bad spot in the 3 position. Time for a tuneup. Get all new cap, rotor, wires, and plugs. Should be around $100.

Dec 02, 2008 | 2000 Ford Taurus

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

Related Topics:

76 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

74896 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7688 Answers

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

Answer questions

Manuals & User Guides

Loading...