Check Engine Light Problem. - Engine Troubleshooting


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

Brake Seals Bulging

2021 Toyota Corolla LE 1.8l 65,000 mile...

Check Engine Light Problem.

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

alohaguy
New User

Nov 6, 2006, 7:52 PM

Post #1 of 4 (1466 views)

Check Engine Light Problem.	Sign In

98 Olds Cutlass, 3.1V6. After idling for a while with the heater on, "Check Engine" light comes on. Does not come on unless heater is turned on while idling. Performance seems unaffected and light goes out after driving for awhile with heater turned off. Technician says code means "backfire or misfire", says try higher octane gas, but it doesn't seem to help. ???

steve01832
Veteran
steve01832 profile image

Nov 7, 2006, 2:29 AM

Post #2 of 4 (1464 views)

Re: Check Engine Light Problem.	Sign In

A misfire would kick the engine light but the engine light would not go off. My guess is that since it is only with the heater on you may be setting an A/c or cooling fan code. Turn your heater to defrost and listen to see if the A/C compressor clutch is pulling in and out. You will hear it click, the compressor will run for a few seconds, then click again, the compressor will stop. This is called cycling and it is normal operation. Have the computer scanned again at a different shop. Make sure they scan not just the OBDII codes, but also scan the GM codes. There are 4 different class codes. You may have more codes stored in the computer but the OBDII codes are only generic codes. Please post back and let us know what turns up.

Steve

DiagnosticToolDave
New User

Oct 18, 2007, 5:03 PM

Post #3 of 4 (1334 views)

Re: Check Engine Light Problem.	Sign In

I use a diagnostic tool called CarMD. It will pretty much tell you whatever is wrong with your car as long as it is a 1996 or newer. It costs about $90 and it plugs into the On-Board Diagnostics (OBD-II) port. Very easy to use. Heres a link to the site if you want to check it out: http://www.carmd.com/

way2old
Veteran / Moderator
way2old profile image

Oct 18, 2007, 5:44 PM

Post #4 of 4 (1328 views)

Re: Check Engine Light Problem.	Sign In

Hey dave.. This post is a year old. You probably wont get this poster to respond

Being way2old is why I need help from younger minds

Search for (options) Privacy Sitemap