Question about 2004 Chevrolet Tahoe

1 Answer

Engine has a miss at idle exspecially in the morning

Have a 2002 tahoe with 84000 miles last year i noticed a rough idle in the morning when i started it the sevice engine soon light would flash but when started driving it went out and the truck would be running better but still had a hesitation at idle or sitting still.i changed plugs and wires and gapped plugs at the right specs.nothing worked.then i put a maf sensor on and thought it fixed it but the weather had just got warm and besides the little miss it was running better untill it just starting getting cold again now it started again finally i had the engine light stay on and got a code 0174 i put spark plug gappers on the oxygen sensors and cleared the code nothing again.just today i changed the plugs again and gapped them at the called for specs,there was a wet reddish yellow tinted substance on the first 2 plugs on the drivers side. once again still have the faint miss sounds like it could stall but dont. it seems 2 run a little smoother but the miss is still there. any suggestions would very much be appreciated. im out o f ideas only thing else i can think of is the intake plenum gaskets.

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers

Need to pull plugs and crank over in morning and see if water blows out of any plug holes. Sounds like water in cyclender.

Posted on Dec 22, 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:

3 Answers

2002 Sable sedan choke/missing/sputtering intermittent

The PO 316 is still misfires om first 1000 revolutions
so the shop did a poor job for you on resolveing the
cylinder misfires

Try a diffferent shop

Have to clean the MAF Sensor & replace upstream
oxygen sensors if over 100,000 miles

Need the correct oem spark spark plugs/any brand

No reason the gas filter should be clogged unless it was in
the car for 10 years

Fuel pressure should be checked

Need to check for cylinder misfires on a road test of 20
miles or more with professional software in Mode#06

Jan 17, 2013 | 2002 Mercury Sable

2 Answers

How do i know if i need a tune up?

Usually @ 50-60,000. New air filter, Gas filter, Plugs and wires.......If car starts running rough or hard to start and miss fire is a good sign of a tune up needed..............Hope this helps.

Nov 21, 2010 | 2002 Chevrolet Malibu

1 Answer

I have a knocking noise in my 2002 chev tahoe when I crank it up in the mornings,the colder it is the louder the knock.After about 30 sec. it stops and you don't hear it anymore.what's wrong?

It's called piston slap, what happens is that when the engine start to get a few more miles in it's life. The clearance between the piston and cylinder walls are greater then when the piston are warmed up and has expanded.
You can add Lucas oil treatment to you engine oil to put a film of oil along the cylinder walls, so when you start the engine there is a coating of oil there that will help your engine to last longer. Just follow the instructions and try not to drive the Tahoe until the engine has warmed up a bit, the winter will be more noticeable and will take longer for the piston slap to go away.
Gm has a up graded program to address the piston slap to help make the engine last longer. Believe it's covered under the TSB if you bring it in to have it addressed. The program simply turns the timing back on the engine when it's cold to help eliminate most of the knocking and is helpful in making the engine last longer. As the engine warms up, the program brings the timing back to where it should be to not economy and performance is lost.
Thank you for using fixya and good luck.

Jun 15, 2010 | 2002 Chevrolet Tahoe

3 Answers

2002 express 1500 van, will not start

remove dog house locate test port and install guage should be 45-60 psi

Mar 03, 2010 | 2002 Chevrolet Express

2 Answers

2002 Tahoe Dropping Cylinder

A tune up will not cure the lean code, in fact an engine miss gives a rich code from the unburned fuel. I would suggest u verify u have no vacuum leaks, also clean the inside of the MAF sensor if so equipped and replaced the bank two O2 sensor, that is the passenger side sensor before the catalytic converter. If u have the money replace both right and left sensors, it is better to do them in pairs.

Jan 15, 2009 | 2002 Chevrolet Tahoe

Not finding what you are looking for?
2004 Chevrolet Tahoe Logo

464 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

77169 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22258 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