Question about 2006 Hummer H2

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H2 HUMMER MAXIMUM SPEED 80KM/H CANT GO BEYOND

HAD A MISFIRE ON CYLINDER 3 AND 2 WHICH WAS SOLVED BECAUSE OF LOSE CONNECTOR.

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  • Anonymous Apr 13, 2009

    i have the same problem in my Opel Astra. what could be the reason for slowness

  • Paul Huckle
    Paul Huckle May 11, 2010

    Hello

    Have you have the codes cleared (P0303 & P0302) as this will slow you down



    Regards Paul

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  • 12 Answers

Check the fuel bomb.

Posted on Sep 09, 2009

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1 Answer

Why is there a cylinder 2 misfire?


Check these three things in the misfiring cylinder: spark, gas, and compression. One of them is wrong or missing. For spark check the spark plug and wire. Make sure you have spark on the plug wire, a strong blue spark. For gas, the fuel/air mixture may be wrong. Does the fuel injector pulse, putting gas into the cylinder? Possibly you may have a leaking injector or a clogged injector.

If gas and spark seem okay, you need to check compression in the cylinder. Low compression will cause a misfire. If compression is 20 or 25% lower than adjacent cylinders, that could be causing a misfire. For example, say numbers 1 and 3 cylinders had about 150 psi compression. 80% of 150 = 120, so if cylinder 2 is 120psi or less, that could be setting the misfire code. Low compression can be caused by valves not seating well, or bad piston rings, bad head gasket- something in the combustion area of the cylinder is losing compression.

Aug 17, 2015 | 2006 Mazda Tribute

1 Answer

2005 cavalier misfiring on #2 and #3 cylinders.


maybe the oil got on your computer and shortened it out maybe you need to replace the unit that the oil got on

Mar 05, 2017 | 2005 Chevrolet Cavalier

1 Answer

Mazda 6, no pulse ( coming from ECM) on the 3 pin connector on the coil pack , misfire P0301


Follow this link http://www.6crew.com/forum/showthread.php?3911-DIY-EGR-Modification-Optimization. This will help you fix issue

Feb 02, 2013 | 2004 Mazda 6

1 Answer

Cylinder 3 misfire


Have a repair shop that has the proper test equipment
& know how- solve the issues

Watch some You Tube Video,I know you will
learn as much as your willing to spend time- on that site

Dec 12, 2012 | 2002 Volvo V70

1 Answer

Test revealed cylinder 5 is missing on my 98 expedition


You have a bad COP Ignition Coil or several

They only misfire whenever they feel like it

If you had professional software --you could road test in
Mode #06 & look at cylinder misfire counts

You need to buy a couple of coils & try in cylinder #5,
front one drivers side

If that isn't the correct one or you have several,walk the
other new coil to get to the bad ones

Disregard any other stray codes until the coil issues are
solved

If it stays on your have Class B misfire
If it flashes you have a Class A misfire that could
damage the exhaust converter

Dec 03, 2012 | Cars & Trucks

1 Answer

Chevy vortec 305 misfire on # 6 cylinder


Could be 1 of 3 things sparkplug fouled,sparkplug wire or a faulty injector or injector wire connector has a poor connection.Also if this engine has 1 coil per cylinder then the coil for that cylinder could be faulty.

Jan 20, 2012 | Cars & Trucks

3 Answers

Getting codes P0341, p0300, p0301, p0302, p0303 on my 2001 audi a4 2.8 quattro, how do i fix this


Hello! The Trouble codes are pointing at ONLY cylinders 1-2-and 3 (P0301, P0302, and P0303)...P0300 is telling you Random Misfires...P0341 is pointing at the Camshaft Positioning Sensor A (Bank One)...When you face the front of the engine, the Left Bank are cylinders 1, 2, and 3...Although TSB's are written for this problem that isn't much help since you'll pay for it anyway...

The solution is to replace the Camshaft Positioning Sensor A...Of course, check its connector first for bent, dirty or broken pins...Buy a can of Electronic Contact Spray and clean both male and female ends of the connector before buting a new sensor....Follow procedure below...Push two safety pins into the rear of the connector on the specified pin #'s...See diagrams below....Saailer


10_24_2011_3_19_41_pm.jpgSTANDARD MOTOR PRODUCTS Part # PC345.....Cost $80



10_24_2011_3_41_08_pm.jpg


10_24_2011_3_41_51_pm.jpg

  1. Connect a Digital Volt Meter to measure voltage across the CMP connector terminals 1 (B+) and 3 (Ground).
  2. Switch ignition to "ON", but Do NOT start engine.
  3. Measure voltage between terminals 1 and 3 . There should be a minimum 9.0 volts.
  4. Switch the ignition "OFF".
  5. If reading is not 9.0 volts replace the sensor...
  6. You'll have to remove the timing chain to replace it...
any questions send a comment...Guru...Saailer

Oct 24, 2011 | 2001 Audi A4

1 Answer

1998 gmc yukon 4 wheel drive what does it mean when the number5 cylinder is misfiring and I changed the plug and the wire,just had a full tune up with coil and module,fuel filter! What could be the problem...


cHECK YOUR ANTI-FREEZE LEVELS IT IS PROBABLY LOW. These engine are famous for the in take manifold leaking internally and externally on cylinder # 3 & #5. This will cause the computer to give a misfire code. Tzop up your anti freeze and pressure test the cooling system I can gauruntee you lose pressure and it will be your intake gasket. You will have to replace it the gasket kit cost about $100.00 make sure you but the Fel Pro gasket kit it has been redevelope and made from steel rather than plastic. This will solve your problem and your truck will run much better as well.

Apr 25, 2011 | GMC Yukon Cars & Trucks

2 Answers

Hi my 2006 cadillac cts has error codes po 300 303 305 343 347 368 392 and 496 can u tell me what they are or a website to find out thank u


P0300 is multiple engine misfire detected
P0303 is misfire in cylinder 3
P0305 is misfire in cylinder 5
P0343 is camshaft position sensor A (bank 1)
P0347 is camshaft position sensor A (bank 2)
P0368 is camshaft position sensor B (bank 1)
P0392 is camshaft position sensor B (bank2)
P0496 is EVAP Canister Purge System High Purge Flow

Jan 28, 2011 | 2006 Cadillac CTS

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