Question about 1999 Chevrolet Lumina

1 Answer

Rough ideal after warm up have new map, maf coolant sensor wires, plugs and coil packs. no coolant leaks, no vacuum leaks. fuel pressure OK. runs great except for ideal cam sensor OK compression OK. Even check all fuses ok and relays ok. wires check out ok also still stumped. This engine is only 6 months old by the way it just started this yesterday.

Posted by on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Habit-Forming:

    Visited the website for 3 consecutive days.

    Filmmaker:

    Uploaded 5 video answers.

  • Expert
  • 82 Answers

Try the tps, throttle position sensor, and the idacv, idle air control valve. Even sometimes the temp sensor could be bad, telling the motor its cold when its really hot..

Posted on Oct 08, 2017

Ad

6 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

milespeed

  • 599 Answers

SOURCE: Service Engine Soon Light and Rough Idle (Below 1200 rpms)

do you get check engine codes?..have you done a leak down test and compression test to determine mechanical engine health?

Posted on Oct 07, 2008

Anonymous

  • 4 Answers

SOURCE: 89 Corsica: no power, hesitates in drive, idles

Check your fuel pressure, and or injectors. You may have too much fuel getting into the engine causing it to burn rich and overheat the converters.

Posted on Apr 26, 2009

bitchn65cuda

anel liberto

  • 70 Answers

SOURCE: 1996 s10 2.2 engine starts but idles rough and will not rev up.

Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located  before the catalytic converter?  The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!

Posted on Apr 29, 2009

Anonymous

  • 30 Answers

SOURCE: I have a 96 cavalier z24. when I start it up the

See if there is a code in the computer and work from there. Find someone with an OBD2 code reader. If I'm not mistaken an OBD2 code reader works on 1996 and newer models. Could be a bad coil and you don't notice it when you first start it until it idles down, to check for that, while the engine is running, pull each wire off the spark plug, Each time you do that you should hear the engine struggle. Then pick back up once you plug it back to the spark plug. If you pull one and nothing happens to the engine, that could be all or part of the problem. Hope this helps.

Posted on Nov 24, 2009

6bta

  • 400 Answers

SOURCE: 98 Chevy Tahoe 5.7 liter engine cuts out and

Have you checked for vaccume leaks?
You've got lots of parts in there, Has the problem been the reason you have replaced all of those, or did it come up while doing some of the repairs?

Posted on Dec 18, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Hard start runs rough floods bad


Well--I usually would say do some testing

BUT- on a 23 year old vehicle--I would mail away
the injectors & have then tested & Ultrasonically
Cleaned

Then install new spark plugs

Next check fuel pressure

New oxygen sensors-again- I assume nothing has
or is every been done to it

Clean the MAF Sensor & check for Vacuum leaks

Jul 27, 2014 | 1991 Ford Explorer

1 Answer

1999 chevy lumina rough idea after warm up


It could be several different things causing this, my first guess would be to look at the EGR port going into the intake. Most times it will clog up and can cause rough idling. You must know how to clean it properly, the EGR valve will have to be pulled as well as the throttle body in order to clean it properly. Also, check for vacuum leaks. It could be other things as well but this is where I would start. Hope this helps. Thanks, Allen with Morgan's Auto Repair 912-282-1602 Waycross, Ga.

Mar 12, 2014 | 1999 Chevrolet Lumina

1 Answer

2004 grand am ecotoc idles surges from 500 too 1000 rpms. i had a PO300 code and i replaced map sensor,maf sensor, fuel regulater, spark plugs and boots,icm and coil pack. now i have no code showing b


three things to check-idle air control valve if you haven't checked already-a crack or leak in the intake manifold-or clogged ports in your intake manifold

Mar 24, 2013 | Cars & Trucks

2 Answers

P0300 and rough or no run 2003 Impala 3.8


fuel regulators are notorious for going bad in them maybe start there

Dec 05, 2012 | 2003 Chevrolet Impala

1 Answer

My '01 impala 3.4 v-6 flat spots when COLD, at around 20mph. the idle is ruff with random misfires. acceleration is overall poor. when HOT, most symptoms go away leaving only some slight acceleration...


depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). Also get the throttle body and iac valve cleaned by throttle cleaner . Also this other possibilities are to be checked and confirmed.:---- Engine running rough or misfiring can be cause by the following:

1.Defective spark plugs
2.Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4.False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

--------- This should help.Keep updated.Thanks.Helpmech.

Mar 27, 2011 | 2001 Chevrolet Impala

2 Answers

I HAVE A 1998 FORD EXPLORER AND IT HESITATES ON ACCELERATION AND SOMETIMES IDLES ROUGH. I REPLACED THE SPARK PLUGS, WIRES, AND THE COIL PACK AND STILL HAVE THIS PROBLEMS. THE CODES SHOW MISSFIRES IN BANK 3...


Try running some fuel injector cleaner through your fuel tank. What you may have are a couple of plugged or missfiring fuel injectors. I would suggest checking all of your wiring to your injectors to insure good connection, replace your fuel filter and check for vacuum leaks.

Jul 20, 2009 | 1998 Ford Explorer

1 Answer

The EGR vale is new, it it is rough idoling or driving..i drive about 104 miles a day..it use about 1/4 tank gas per trip. (new plugs) they are fowled out .. i pulled the wires one ata time no change in...


SCAN IT TO SEE IF YOU HAVE MAP SENSOR WORKING.ALSO CHECK VACUUM LINES GOING TO MAP SENSOR MAKE SURE ITS NOT. BROKE OR CRACK.CHECK COILS RESISTANCE.BAD COILS CAUSE ROUGH IDLING.SCAN MAKE SURE COOLANT SENSOR ISNT OPEN.REMOVE EGR VALVE. CLEAN OUT CARBON IN THE INTAKE PORT.USING A PIECE OF CLOTHES RACK.CLEAN UP DEBRIS.ALSO CHECK FUEL PRESSURE REGULATOR.CHECK VACUUM LINE TO FUEL PRESSURE MAKE SURE ITS NOT FULL OF GAS.AND DONT HAVE CRACKS IN IT OR BROKE.

Jun 06, 2009 | 1994 GMC Sierra

1 Answer

Vehicle runs rough and seems to be flooded


Assuming it has a 3.1 V-6, it could be any # of failures. Bad plug wires, ignition coils, control module (under coil packs), crankshaft position sensor, map sensor, throttle position sensor, egr valve, fuel pressure regulator, fuel injectors, engine coolant temperature sensor, vacuum leaks; have it scanned for trouble codes to help in diagnosing! If you think it is just over fueling (flooding),look at fuel pressure regulator or coolant temp sensor ( when they fail the computer thinks its always -40 F causing it to over fuel). A bad map sensor can cause the same. Hope this helps. Thanks in advance for rating me!

Jan 22, 2009 | 1993 Oldsmobile Cutlass Supreme

Not finding what you are looking for?
1999 Chevrolet Lumina Logo

Related Topics:

37 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

Marvin
Marvin

Level 3 Expert

85222 Answers

Jonah Oneal

Level 3 Expert

14092 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22485 Answers

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

Answer questions

Manuals & User Guides

Loading...