Toddman S2K

Hey Guys, I recently bought a 99 white s2000, i have changed a few things like oil, plugs, timing chain tensioner, and removed an apexi neo that was wired in really wrong, the car is still not running right. there is no vtec!! it drives but very low on power, when i pull up to traffic lights its nearly cuts out and when i get back to the house after a little drive when engine is hot, turn off engine and it just cranks for about 10 seconds and then starts , sometimes it doesn't even start??? I have no clue what to do?
Any help would be greatly appreciated!!!!

the mods on the car are
Full Mugen Exhaust System
Spoon ECU
Bilstein Coilovers
and strut bars and stuff.

I disconnected a Defi controller and apexi neo that was plugged in because they weren't working properly, the apexi says i was doing 240kms when i was rolling in my garden at about 2-3km?????
the defi was just beeping constantly!?
I would really appreciate any help????

AE_Racer

Did you have to re connect any wires on the ecu or was the apex'i unit plug and play? IF someone hacked the apex'i unit into the factory harness id be looking there to make sure all the wires are connected properly..

Toddman S2K

Yes it was hardwired into the ECU , i wired it back up correctly , ill check again but I'm pretty sure it is all ok.
What else would cause it to run like this?

Toddman S2K

I was also getting engine check light before when that apexi was wired in, but no check light now???

when the apexi was wired in , engine check light would turn on at around 6000revs .????

AE_Racer

well, first off, how did it run before you removed the apex'i unit?

Toddman S2K

it ran the exact same , just with an engine check light. now there is no check light. Im going to do a compression test in the next few days

bgoetz

Unfortunately my gut is telling me that the compression test isn't going to come back good

Any indication that the car has ever been overreved?

Toddman S2K

I have no idea if the car has been over revved before? Why do you think the comp test isn't gonna be good??

bgoetz

Everything your describing sounds like my civic when I bent a valve, maybe I am wrong though. No VTEC and a CEL @ 6k could also point to and oil pressure issue

pennies_hatchie

i agree with bgoetz. sounds engine issues and i would recommend a leak down test. also, have you changed out your ecu to a stock one from the spoon?