after sitting still for 2 minutes or so at traffic lights if i pull away and floor the loud pedal in 1st the revs whip up to about 6500 and then die! it is like the rev limiter cutting in way way too early. it doesnt happen every time but most, particularly after sitting still on tick-over.

sometimes a similar thing happens in 2nd gear around 7000-7500rpm but it doesnt cut right out, the engine merely dips and then picks up again.

I just took a mechanic out from my garage and he plugged in his diagnostic computer thingy - naturally the problem did not repeat itsself...

Please help me?!

 

VTEC is inhibited when the oil pressure it too low.

 

joecro,

NO VTEC BEFORE 3 BARS. The S2000 has an unadvertised rev limiter which inhibits reving beyond ~7000 RPM before the engine temp reaches three bars. Some have found that you are able to rev beyond this limit in two bars. Although I think it is foolhardy to REV a cold engine(under three bars). And this still doesn't mean that all of the engine fluids have reached their optimum temp, especiallyin colder areas.

All that to say, wait for two bars, at least(I always wait for three, and then some), before trying to rev past 7k RPM.

 

Sounds like it might be the MAP sensor (assuming it happens with a fully warmed engine). Apparently a number of us have had the problem that feels like intermittent VTEC operation or fuel starvation that is caused by a sticking MAP sensor.

As stupid as this sounds, this works.. Remove the MAP sensor from the top of the throttle body and tap on it several times with the screwdriver. Reinstall and you are ready to go.. it should be fixed.

 

Just a few short days ago I had the same question. If you scroll back you can find "Rev. Limit 7K?
The posters here indicated that you can't V-Tek until "3 Bars". My question was where was the limit defined. This is not written anywhere so I contacted my friends in Japan that work at "the plant"...engineer to engineer. You can now link to my friends at FOE compliments of me from the S2Ki homepage. Be aware FOE speaks MINIMAL english! Bottom line is the V-Tek lock-out is based on oil temperature and not water temperature (i.e. three bars). This temperature is invisable to the driver but not the PCU.

 

Cold climate: let the temp go to three bars
Warm Climate: have the oil temp. sendign unit checked

 

Although that is the way you would hope it works, I find no indication in the manual (or on the engine) that there is an oil temperature sensor anywhere on this car. Neither the lubrication diagrams or the circuit diagrams details one.. maybe you can ask for details.

 

At the risk of seeming pedantic, it's VTEC, not V-Tek.

I'd be wary of any engineer specifying V-Tek lockout mechanisms.

 

Thanks for all your replies...I have comments and questions.

1) "VTEC is inhibited when the oil pressure it too low"

I checked my dip stick when the car had stood all night and it showed no oil at all! there is no oil warning light on. I started it up and let it run for 1 minute then turned it off ans checked again. still no oil. I wondered if this is normal??

2) "NO VTEC BEFORE 3 BARS"

The car had been running for 1 hour

3) "the problem that feels like intermittent VTEC operation or fuel starvation that is caused by a sticking MAP sensor."

sounds familiar - is it really easy to remove and safe to do so?

thanks

jc

 

1. It has been stated by some owners that their S2Ks loose small amounts of oil over time (mine hasn't in 12k miles), however, it is to your immediate benefit that you add oil NOW to attain the appropriate level. It should be between the upper and lower marks on the dipstick.


2. BUT, did the temperature go up? Could be a bad thermostat that never closes, keeping the engine too cool. It is winter, depending on where you live (?).


3. The MAP sensor is located at the entrance to the throttle body, at the top of the intake. It looks very easy to remove, a harness, and a couple of screws. It should be safe to do as long as the engine isn't running. And I'm not sure it would be unsafe with the engine running, but not something I would do.

Hope this helps.

Paul