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View Full Version : LS/VTEC problem


rickylsi
02-21-2007, 04:27 PM
My friend just installed an ls/vtec in his 00 civic si and is having trouble. If he just presses the gas down it will start to rev then bogg down. He can just keep tapping the gas and it will rev up. Can someone help.
SLow_POke
02-21-2007, 05:32 PM
. bad ecu maybe . any check engine light ?

take it to a shop tog et it checked . if your friend cant diagnos the prob i dont think he'll be able to fix it
rickylsi
02-21-2007, 05:41 PM
No check engine light. He is planning to take it to a shop but I was hoping maybe it was something small like a vacuum line or something to that nature. He has had to replace his cat awhile ago because of his old b16 was smokin bad and cloged it but could this happen if the cat was clogged again.
scttydb411
02-21-2007, 10:08 PM
what ecu is he running? any cel?
rickylsi
02-22-2007, 05:18 AM
He has the stock 00 SI ecu, whatever that one is.
SKUNK2GUY
02-22-2007, 05:37 AM
g/l ls/vtec is a nice choice! if done right:goodjob:
jmmx258
02-22-2007, 09:19 AM
No check engine light. He is planning to take it to a shop but I was hoping maybe it was something small like a vacuum line or something to that nature. He has had to replace his cat awhile ago because of his old b16 was smokin bad and cloged it but could this happen if the cat was clogged again.

It's entirely possible. Pull the exhaust off from the header and start it up! Same thing happened in my dads truck.
scttydb411
02-22-2007, 09:28 PM
ecu for 00 si=1.6 vtec
ls/vtec=1.9 vtec

what you're running right now is ecu for lower displacement and different timing maps. ls/vtecs almost always need to use a socketed/chipped and tuned ecu. sometimes you can get away with running a gsr ecu since they are same displacement...think of a ls/vtec as a gsr w/ more torque and less revs.

let me know if you want a socketed/chipped ecu.