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View Full Version : Check Engine light at high speeds with high rpms


add_tooth
05-05-2003, 06:45 PM
when when i was going at about 109 in my mkII 5mge and had the rpms at 5500 the check engine light would come on then i would slow down and in about 1 min it would turn off, this dosent happen every time i do this but i happened about 3 times in the same situation. is this a sign of some thing happening in my engine
CRF_Rider
05-05-2003, 08:09 PM
Dont get me started man.

This has been happeneing to me forever. Replaced the O2 sensor. same issue. My engine code is 21 which indicates the O2 circuit.

I am thinking that the engine is running lean for some reason. I blew my new HG at 20K because of detonation and it may have to do with this. I intend to put my car on a WB dyno as soon as I get it back together to see if it is actually running lean. I will also be running a A/F gauge for what little good it will do.

The first thing you need to do is find out what your engine codes are and what they mean. Hopefully you can just replace the O2 sensor and be good to go.
Good luck...
thshiiam
05-05-2003, 09:26 PM
My car does the same thing. When you accelerate at WOT does it feel like it is stuttering?
Henge
05-05-2003, 10:17 PM
It did it on mine right before I blew my engine :? check ur oil...thats why my engine blew :cry:
SilverMk2
05-05-2003, 10:43 PM
If you have an 85 or 86 short the check connector and take it for another spin and see what the check engine code is exactly. More than likely its an 02 sensor, but it could be a lot of things.
RobMK2
05-07-2003, 01:58 AM
just to twrow mine into the pool here, it happend to me after traveling at 190kms for about 30 seconds, while trying to impress someone (and it did)... pulled over when I saw the light and after a while it went out. havent really pushed the car that hard since.
add_tooth
05-07-2003, 05:19 PM
My car does the same thing. When you accelerate at WOT does it feel like it is stuttering?


"WOT"?? meaning


yeah a little what should i do?
CRF_Rider
05-07-2003, 05:46 PM
WOT = Wide Open Throttle
artm
05-07-2003, 10:00 PM
When you short the check connector where/how do you check codes?

Art
CRF_Rider
05-07-2003, 10:15 PM
http://www.personal.psu.edu/users/r/a/rae125/checkeng.html

That should give you all the info ya need.