Honda s2000, 2001 loose of power when vtec engages
I get to around 6000 rpm it sputters continues to 9000 rpm.No Engine light or codes. Vtec is working . I removed the solenoid and cleaned, replaced the gasket and screen everything good
Changed the oil and filter .
No vacuum leaks, all new hose
Good oil pressure 85psi
Good fuel pressure 55psi
Replaced coolent sensor
Removed oil pan see if there's any problems, cleaned oil pump filter screen.
checked olms on vtec solenoid , good
Did the map sensor whack , removed and cleaned , had it checked, works
Replaced VTEC oil pressure switch.
New spark plugs
Coils where checked and good
Engine temp is good and within range

Car acts like you are hitting a rev limiter or something


A/F RUNS REAL RICH BELOW 10.0 ON MY METER BETWEEN 6000 RPM - 9000 RPM

Video
http://www.youtube.com/watch?v=HjQdE..._embedded#t=12

http://www.youtube.com/watch?v=LA7qoLRo168

 

because you don't buckle up, vtec knows you are not ready for the power...

 

You only need one thread about this sir.

 

Sounds like a pretty obvious issue with the tune to me. Can you post your timing and fuel maps?

 

Have you performed the "Wack Map" technique? That could be your fix....

 

VTEC isn't as audible as it used to be to me
mine used to go

vrrRRRRRRRRRRVEEEEEETEECCCCKKKKKBAAAAAHHHHH

 

let the car warm up..u have to have at least two bars on the temp gauge for the vtec to engage..it happend to me twice..both times didnt let the car warm up and tried to rip it..on a completely stock s2k

 

did you watch the vids?

 

vtec solenoid not working? pretty obvious that vtec is not engaging.

 

u wanna trade my vtec work fine

 

I have had this issue before, and I am running E-manage ultimate. Try adjusting your map clamp down. I was running 2.85V on my map clamp and adjusted it down to 2.7x. The factory ECU looks for a maximum of 1 atmosphere and if it sees more than that it retards ALOT of timing like that.

 

engage the vtec with a 12V source to see what happen

you will know if the oil line, vtec solenoid are good

 

vtec with a 12v source only clicks at the solenoid , nothing else happens.

 

at which RPM?

you need about 2-3k to have 45 psi+ oil pressure

 

@ idle

 

Oil level?

 

Oil lvl is good just had a change today

 

give about 2-3k rpm and put the 12V on the solenoid

 

it stutters bad

 

Got the answer. it's cause you're low on gas. JK
Could it be back pressure, your cat/exhaust may need to be replaced? that could explain why u lose power at high rpm with back pressure. i hear vtec engage so dont think it's that.

 

You should check to see if you have bad gas., like with water in the tank. Thats what it sounds like to me. I know it sounds simple but ive had the problem before...drain the tank and put some good back in...

 

I have no CAT

 

bump

 

Does it do it all the time, or only at WOT? I had a similar issue, and it ended up being one of my coil packs. Vid at the bottom of the thread.. http://www.s2ki.com/forums/index.php...&f=22&t=727458

 

Any luck on finding the problem?