My check engine light kept coming on once i would let it slow down by the compression of the motor. i just built the motor inside and out and dont know why its doing it. I read to try and find a plug if you dont have one you will have a LED light on your ECU and i turned the key on but didnt start it. The LED flashed one time and paused and then flashed 20 times pretty quick and then paused and again one slow and 20 fast... Anyone know what that means THANKS!!

 

code 10 is IAT (intake air temp) and code 20 i think is eld (electronic load detector)

Make sure you didnt accidently switch the iat plug with another one.

 

code 10 is IAT (intake air temp) and code 20 i think is eld (electronic load detector)

Make sure you didnt accidently switch the iat plug with another one.

 

I Dont know What both of those mean... more info if possible.. please and thank you

 

...and you rebuilt an engine?

You should know the fundamentals when working on a car!

Search and you will find what you're looking for... or use the manual you should have if you just rebuilt your engine.

 

I got pictures of the build... if you dont believe me...

 

i guess i could say i understand what they mean... just dont know exactly where there are

 

Well if your sure its 1 long flash then its code 10, but if its one short flash its code 1 (o2 sensor)
The intake air temp sensor should be on the back of your intake manifold. A small round white 2 wire plug. Something is wrong to make it throw a cel...Possibly you mixed that plug up with your Iacv (idle air control valve) also located on the back of your intake mani. Or the sensor got broke/pinched wires.

I'm not sure what causes the Eld code 20. I would fix the code 10 problem first and go from there

Maybe someone can give more info on that..

 

i would think the o2 sensor would cause the light to go on right away but it takes awhile.. i dont know for sure... ill check it out... thank you... jsut a little tip is it will come on all the time but it takes awhile inless im going down a hill and let it slow its self down then it comes on right away

 

i looked into the code 20 and it says something about a open or grounded circuit on the ECU. which i can relate to i think... because i installed an AFC and im guessing its just throwing that code because its not used to having that hooked up...but im not sure... and your right i looked again and its 1 short blink... o2 sensor is prob bad...

 

Anyone got any idea's? please and thank you

 

That says it all.
Go back and return the car to stock and go from there. SOLDER your wires.