Question about 2002 Chevrolet Avalanche

1 Answer

Miss on cold start up

02 chv avalanche 8.1 coil on plug, missfire on cold startup goes away after warm up and shows sometimes under heavy load, injectors, plugs, wires have been replaced, fuel pressure good.

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,027 Answers

Have you checked the oxygen sensor? If the engine is running lean, then it would behave the same as you described. Those sensors should be replaced every 80K or so.

Posted on Sep 05, 2008


1 Suggested Answer

  • 2 Answers

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

a 6ya Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

06 dakota 4.7. P0300 replaced plugs,injectors,coils,o2 sensors & all other sensors,intake cleaned.bad ecm? cats show same temp both sides of cat, bad cat? Or??

Have you checked for vacuum leaks? Poor idling when cold that gets better when the engine warms up, or at higher RPMs are symptoms of vacuum leaks. Check all hoses and connectors. If it's a manifold gasket, you will want to use a smoke machine (check when the engine is cold).

Apr 03, 2017 | Dodge Dakota Cars & Trucks

1 Answer

Hard to start cly 3 missfire smoothens out fast

You might want to pressure test the cooling system and remove the #3 spark plug. After the pressure tester sits on there for a few hours look into the combustion chamber to see if there is coolant. Misfires like these can sometimes be the result of a leaky head gasket. Also white smoke in the exhaust can be a sign. I assume the spark plug looks good?

Dec 23, 2011 | Volvo S40 Cars & Trucks

1 Answer

My 2003 polo 1.2 is juddering at idle when warm, under load its fine. It seems to be slighlty better when cold but once warm it almost feelds like it miss firing

Hi ,
Imbalance of engine at idle can be caused due to many reasons..

1: Spark plug
2: Ignition coil
3: Cylinder head
4: Piston rings

Please let the spark plug and ignition coil checked asap and if that shows ok, then do an engine compression test , this may help to resolve the issue.


Mar 31, 2011 | 2002 Volkswagen Golf

1 Answer

After running about 35 minutes my truck starts to cut out and buck real hard especially under a load. I have replaced fuel filter, plugs, wires, rotor, and cap. I'm starting to think electrical. Any...

The coil will do this as will a clogged catalist converter ( exhaust restriction ) Oxagen sensers will fail after getting too hot too and sometimes after coolant temperture sensers get hot they say their cool or even cold and thier not and give a rich mixture. Not all problems will turn the check engine light on, not a lying senser ( a failed altogether one will) Are the check engine lght on and has the oil been changed recently? If you have a missfire the fuel from the missing cyclinder ends up in the oil and it'll heat up and the fuel blows out of the oil and goes though the venting system and makes the mixture too rich. A therostate that does let the engine warm up all the way will do this too as the engine will stay cold and therefore rich to warm up the engine. Being you didn't list the year ro model or car or truck or engine size I can only guess and if it's a carborated vehical theirs still other things to check.

Dec 17, 2010 | Toyota Pickup Cars & Trucks

1 Answer

02 Dakota sometimes missfires, most times runs great. Code reader shows "random missfires" Vehicle sits a lot; 21K miles on an 02. Changed idel air control sensor, throttle sensor and absolute pressure...

I would replace the spark plugs and more importantly the spark plug wires. It may be a bad plug wire with a break in it somewhere. It be so small that it only grounds the wire out when it gets warm due to expansion of the insulation around the wire.

May 15, 2010 | 2002 Dodge Dakota Club Cab

1 Answer

I have a 2000 gmc sierra 5.3 with a number 6 cylinder missfire. things i have done so far: 1. compression test on number 6 tested fine,as well as the rest of the cylinders 2. leak down test. Held...

I would check the valves for number 6. If one or both are burned, stuck or out of adjustment it would cause your problem. If a cam lobe for that cylinder is burned or badly worn it could be the culprit.

Jan 10, 2010 | 2000 GMC New Sierra 1500

1 Answer

1990 454 mercruiser misfire under load when warmed up

Running on a stand is not the same as running under power...In the water, you are essentially running on a dynomometer (dyno is a big water brake) If you can prove that the module isn't putting in enough advance, it would be doing the same thing that I mentioned with the damper, only for a different reason.'re likely on the right track. (rather have a points setup out on the water...anything goes wrong, you fix it without a tow!!!!)
Good luck

Aug 29, 2009 | 1988 Chevrolet Suburban

1 Answer

99 suberban missing at idle after warm

Code shows missfire on No 1 cylider. When engine is cold it runs a rich mixture. If the missfire is still No 1 then check for vac leak on manifold. Perhaps a vac line or intake gasket.

May 27, 2009 | 1999 GMC Suburban

1 Answer

Miss-fires especially when cold, hesitates when you excellerate

I had this happen recently to our Buick rendezvous. Unfortunately it was due to a blown head gasket. It goes away when warm due to the block expanding. Coolant was getting through into the cylinder. Hopefully this isn't your problem but the same symptoms. We had replaced plugs, wires, and an 02 sensor before comfirming it was a head gasket. Luckily ours was covered under warranty.

Jan 29, 2009 | 2001 Dodge Dakota

2 Answers

95 chevy truck 4.3 motor has like a miss in high gear after warms

The fault could be in the ingnition module in the dist.I had a car one time that did the same thing but when it was cold,try replacing the the ignition module.

Jan 02, 2009 | 1995 Chevrolet C1500

Not finding what you are looking for?
2002 Chevrolet Avalanche Logo

232 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77194 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides