Question about 2004 Chevrolet Impala

1 Answer

2004 Impala SS 3.8 Supercharged.Running rough.

2004 Impala SS 3.8 Supercharged. When you first start the car, it will start to idle rough, sometimes it will die. The boost gauge starts to climb when it starts running rough. I can fully depress the accelarator several times very quickly & it will clear up. ALL the sensors, except the temp. sensor, have been changed. The fuel pressure checks good. It is not throwing any codes. I have had it in the shop(where the sensors were changed), plugs & wires have been changed. They said the only thing left was the ECM.

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

There is a Recall on some models Catalytic Converter. 03 for sure, and it was covered under warranty up to 80,000 miles. Check with Dealer for replacement ($1500.00 was the ridiculous warranty bill) .If your car is over 80,000 miles then i suggest going to a smaller local garage and having the work done. shop around first, shop online Google the part and should get the cheapest listings with Free shipping. possibly $200-$400 plus installation labor at a good mechanics shop. Always shop for the best mechanic, that warranties his work. Muffler shops will generally be higher, but fast service.

Posted on Nov 29, 2012

Ad

3 Suggested Answers

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

Ad
pippall
  • 1486 Answers

SOURCE: 1987 chevy S10 engine idle problem

relace the throtle air idle valve.The temp switch will allso cause this problem.

Posted on Jul 19, 2009

Mustgo
  • 2359 Answers

SOURCE: 91 S10 rough idle, stalling ALDL problems

Make sure there is no vacuum leaks.


Vacuum leak at intake manifold and vacuum hose.

Bad Idle Air Control Motor (IAC)

Low compression (170 psi + is OK)

Start cleaning and repair these trouble spots and see is there any improvement.

====

For more advance DIY'er then you may try this.

Use a can of Berryman carburetor clean to locate the vacuum leak.


SEE SAMPLE PICTURE HERE


This is a 20-30 minutes job.

Vacuum leaks can occur in following locations.


Intake manifold AND/OR vacuum lines.


Intake manifold is not accessible unless the engine head if off.

You can still check the potential leak by spraying some Berryman near the intake manifold.

Listen for rpm increase after you introduce the Berryman (FUEL) at idle.


Do the same starting from the brake booster unit (the round unit) on the drive side fire all.

Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.

Get a friend to HEAR the RPM increase or monitor for RPM on the tech.

DO NOT AIM the Berryman into any heat source.


PLEASE RATE my answer if it is useful to you.

Posted on Dec 17, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Can I install a motor from a 2002 Impala in a 2004 Chevy SS?


You can, but you will need to bring a lot of the donor car components with and also bypass the security system if you intend on ever starting it.

http://www.diy-gm-security.com/

Mar 02, 2016 | 2004 Chevrolet Chevrolet Impala SS...

2 Answers

Rear defroster works intermittently. Please help.


Quanchi, just for the heck of it remove lower half or rear seat and se if there is a fuse/relay center there, GM did this on some of there cars. press the helpful button

Feb 08, 2016 | 2004 Chevrolet Chevrolet Impala SS...

1 Answer

I have a 2004 impala tuned it up it runs but when i make a stop it turns off or wants to turn off the heads look like they worked on them


Chevrolet Impala Questions - My car keeps shutting off ...

www.cargurus.com > Questions > Chevrolet > Impala

CarGurusFeb 15, 2013 - I just love everything impala but I'm in a predicament now with my ... I also have a 1998 Nissan maxima and does the same the RPM goes up ... Car having trouble starting,rough idling,shutting off at stop 2 ... almost shuts off but seems to give itself gas and keeps running and n... 2004 Chevrolet Impala Base.

CHEVROLET IMPALA ABS/TRACTION CONTROL


Dec 20, 2015 | Cars & Trucks

1 Answer

My 2004 impala makes crack sound whenever I put it in any gear


Could be CV axles or bad engine or transmission mounts. If it is a CV axle, you can check them. They will be loose/sloppy. Up and down or left to right. They do have some, but very little play. Very little.

Aug 05, 2015 | 2004 Chevrolet Chevrolet Impala SS...

1 Answer

Tire size for 2004 impala


2004 CHEVROLET IMPALA BASE/LS 16-INCH
225/60-16

2004 CHEVROLET IMPALA BASE/LS 16-INCH- (TPMS)
225/60-16

2004 CHEVROLET IMPALA SS 17-INCH
235/55-17

2004 CHEVROLET IMPALA SS 17-INCH- (TPMS)
235/55-17

Sep 23, 2010 | 2004 Chevrolet Impala

1 Answer

96 impala SS, is running rough at idle and will stall whenever I press on the accelerator.


check air filter and fuel filter. look at spark plugs and wires make sure they are in good shape also.

Sep 16, 2010 | 1996 Chevrolet Impala SS

1 Answer

2003 Monte Carlo SS Hesitates and Dies after running for awhile


The ck engine light should not be ignored, what sensor was shown to be bad ? Have it scanned again and replace the sensor that is bad if it still runs rough you might want to consider a tune up. Plugs, wires, fuel and air filter's and clean the throttle body with some gumout. It could also be the IAC motor Idle Air Control. Good Luck

May 10, 2009 | 2003 Chevrolet Monte Carlo

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

332 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

76848 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 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

Loading...