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Discussion Starter · #1 ·
I recently swaped LS motor in db1. engine started but it had trouble reving rpm. Engine wont allow to speed higher than 3500rpm I had so much rough time doing this db1 project that makes me wanna puke so Im posting this maybe someone can help me out

-original owner used to run B16 Vtec motor w/ auto tranny
-Im running OBD1 harness + same ECU that original owner used for his B16 vtec auto tranny
-LS motor that i just put in used to have EGR valve but I took it out and blocked it off
-CEL light is on
-RPM jumps around 1200~2000rpm but If I block the top hole inside the throttle body then engine idles normal

back to my question
:Engine wont rev higher than 3500rpm... anybody have solution?
 

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Did you check what codes it's throwing?? Seems like something you'd want to mention...
 

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first cap that vacuum light, second pull the code.

I am not sure but it could be because you are using a auto vtec ecu on a ls but again I am not positive.
 
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