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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
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Experience:  Ase Master 20+ Years Experience Foreign and Domestic
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Chev 2002 Chev Tahoe LS Rough idle on cold start for an

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2002 Chev Tahoe LS

Rough idle on cold start for an extended period - after it reaches operating temp, the rough idle disappears. The engine stumbles and lopes, but does not stall.

Do I need injection fuel cleaners, or a Top Engine Clean?

Paul M ASE Master Technic :

Hello and thank you for Using Just Answer. I'm Paul and I will help you with your Question

Paul M ASE Master Technic :

there is a very common problem with intake gaskets causing rough idle cold

Paul M ASE Master Technic :

once the engine warms up the gaskets seal and it runs better

Paul M ASE Master Technic :

you should have the intake gaskets checked and replaced

Paul M ASE Master Technic :

let me know if you need more help

Paul M ASE Master Technic :

Paul

JACUSTOMER-xhab2tap- :

the engine has 124K mileage. Do i need to take the intake manifold off to inspect the gaskets?

Paul M ASE Master Technic :

you can spray around the intake with a flamable throttle plate cleaner with the engine running... the idle will change when you hit an area that has a vacuum leak... you need to do it when its very cold for best results... the intake gaskets are very common and there is an updated gasket part number #89017589. this will cause your exact symptom

JACUSTOMER-xhab2tap- :

So, you are telling me to spray the intake gaskets with a starter fluid and see if i can get a result.

JACUSTOMER-xhab2tap- :

If that is the case, then i will need to pull the intake and replace the gasket, right?

Paul M ASE Master Technic :

not starting fluid.. carb or throttle body cleaner

Paul M ASE Master Technic :

correct

Paul M ASE Master Technic :

sometimes its hard to find the leak even spraying but it's your worth a shot

JACUSTOMER-xhab2tap- :

The part number listed above, is that for a Chev Tahoe 2002?

Paul M ASE Master Technic :

I am almost sure the intake is your issue

Paul M ASE Master Technic :

yes its for a 5.3 liter

Paul M ASE Master Technic :

what size do you have

JACUSTOMER-xhab2tap- :

5.3

Paul M ASE Master Technic :

ok yes

Paul M ASE Master Technic :

thats the updated intake gasket

JACUSTOMER-xhab2tap- :

is it a big deal to pull the intake - i am familiar with working on older vehicles and used to getting dirty.

Paul M ASE Master Technic :

it's 2.5 hours labor

Paul M ASE Master Technic :

so not very big job

JACUSTOMER-xhab2tap- :

home job or take it to a mechanic - what do you think?

Paul M ASE Master Technic :

if you have removed intakes before I dont see why you couldn't do it yourself at home

Paul M ASE Master Technic :

Paul

Paul M ASE Master Technic :

but because labor is so law

Paul M ASE Master Technic :

low

Paul M ASE Master Technic :

maybe you would consider getting it done

Paul M ASE Master Technic :

to save yourself the headache

Paul M ASE Master Technic :

labor would run 250

JACUSTOMER-xhab2tap- :

cool. one more question - do you recommend doing a fuel injector top engine clean job with an engine with 124K? The deal says they will do it for $165.00 - don't know if that is what i should do.

JACUSTOMER-xhab2tap- :

dealer, sorry

Paul M ASE Master Technic :

Honestly I would check for the vacuum leak first and fix the intake gasket

Paul M ASE Master Technic :

if it was a fuel injector issue its not going to get better after warm up

Paul M ASE Master Technic :

I would only clean the injectors if you continue to have a rough idle after the intake is fixed

JACUSTOMER-xhab2tap- :

Got it - thanks for your help!

Paul M ASE Master Technic :

no problem

Paul M ASE Master Technic :

thank you for using Just Answer

Paul M ASE Master Technic :

Paul

Paul M ASE Master Technic :

Remember to click accept so I get credit for the answer. thanks... Paul

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Let me know how you make out

 

Paul

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