check engine light is on

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Oct 27, 2002 | 03:09 PM

jjoel

Thread Starter

Senior User

Joined: Oct 2002

Posts: 379

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From: Shawnee , KS

check engine light is on

When i start my truck up and get out onto the rode while accelerating my check engine light flashes. once i get about 60 mph hte light stays on. now i was driving on the interstate in missouri yesterday at 70 mph and it was on for awhile then it turned off. my parents and i think that the light is just REALLY sensative cause we can't think of anything that would make it flash/turn on. my oil is normal (although i have to add some every once in awhile) and my tranny is fine, and my heat stays around the cold. the truck seems pretty fine despite its 8-12 mpg. any ideas? im not ready to lose my $1600 i paid for that truck (thats all my money haha).

could spark plugs be causing that? im thinking i'll replace sparks next weekend.

thanks for any input!
jjoel

Oct 27, 2002 | 07:42 PM

billyb

Posting Guru

Joined: Apr 2000

Posts: 1,069

Likes: 1

check engine light is on

do a search here and in the engine forum you have and you can find lots of info on this.

Oct 28, 2002 | 07:20 AM

wbw189

Junior User

Joined: Aug 2002

Posts: 73

Likes: 0

check engine light is on

Hi JJoel,

With your fuel comsumption like it is and the check engine light coming on, I was wondering if your O2 sensor might be bad. But before replacing it, try to pull the trouble codes for your truck. If you go to www.batauto.com , they give a pretty good description of how to pull the codes and what the codes mean. On the homepage, there is a pull down menu for trouble codes with all kinds of makes of vehicles. Another option is to go to someplace like autozone, who will check your codes for free! I hope this will help you a little bit. Drop us a line and let us know what happened.

Good Luck,
Ben

Oct 28, 2002 | 11:45 AM

paulhenderson

Junior User

Joined: Dec 2001

Posts: 50

Likes: 0

check engine light is on

Like others said, this is most likely the oxygen sensor. On late 80's vehicles, the check engine light came on for hardly anything except a bad O2 sensor. They can be a royal pain to change if they are stuck, so be patient!