Rep Power: 0

So i bought a 2003 honda civic 2door EX auto trans off of marketplace cheap, i towed it home and i was very sure it had a bad ECM, i ordered a used ECM off of Ebay with the same matching numbers and received the key imobilizer with it as well, that fixed the poor running condition, now i have an issue with it wanting to cut out bad around 40mph, or in park when the rpms reach around 2500, i am now sure that the engine was replaced with a non Vtec engine, could the ECM be thinking that the engine is a Vtec and causing a timing issue? and how can i fix this if this is the problem, thanks in advance for any help that you might offer.

 
Rep Power: 512

any codes being thrown?

 
Rep Power: 0

yes, upstream and downstram O/2s and vtec solenoid

 
Rep Power: 512

Do you know if that ECU came from a 2004-2005 civic? If so, one of your problems may lie there.

 
Rep Power: 0

it had the same ECM number as the original one in the car, Ebay seller listed as a 2003 civic

 
Rep Power: 368

Look the engine code
look if solenoid is there

https://www.civicforums.com/forums/1...ation-d17.html

 
Rep Power: 0

ya, there is no solenoid there, thats how i knew the engine had been replaced with a non vtec

 
Rep Power: 0

its the D17A1 engine code as well

 
Rep Power: 368

either of those
1 - you will need a non-EX or non-Si ECU
2 - you can install an EX engine head

mind you, the 04/05 have a wideband o2 sensor, 01-03 uses a narrow band

 
Rep Power: 0

can you suggest an ECU part number?

 
Rep Power: 368

https://www.bkhondaparts.com/v-2003-...rol-unit-cabin

 
Rep Power: 0

can anyone suggest an ECU part number that you would suggest for my 2003 Honda Civic EX 2door with Auto trans and now a non vtec engine

 
Rep Power: 368

you can call a dealership and ask
or try car-part.com for listings of scrapyards nearby you

 
Rep Power: 0

i cant find much info on how to read the ECU part numbers to know which one may work, can you recommend a sight that could explain how to read the ECU numbers?

 
Rep Power: 368

https://www.civicforums.com/forums/3...vtec-ecus.html

 
Rep Power: 368

https://www.civicforums.com/forums/3...ease-help.html
https://www.civicforums.com/forums/3...ml#post4617208