Hey folks im in need of some help,i have a 1999 s2000, 65000 miles ,
car keeps on wanting to cut out on low revs i.e coming to trafic lights ect! v-tec is not very strong and tempromental, overfueling! , i have just changed map sensor tonight and reset ecu but no luck . iv rescently had the timing chain top cog/pulley relaced and new tensioner also, car has a loud ticking noise same as tappets !
amy ideas what to try next !

 

Been like it since the chain replacement?
If yes, it would suggest the cam timing is out, maybe its jumped a tooth.

 

well the chain pulle/cog was only replaced due to the bolt shearing and timing was reset twice , there does not seem to be a misfire ect !
if timing was out ever so slightly could this allow the car still to run kind of ok but cause these problems as i thought if the timing was out u would know about it due to the car running like sh*t !

 

A timing chain really should not 'jump a tooth' like a belt can...something would have to be seriously wrong for that to happen.

I would check you've set the timing up correctly...it seems a bit coincidental to me. If that is ok, check out 'MB's Idle Thread', which can be found under the banner in my signature.

 

Well, as you have two cam pullies, its easy to misalign one relative to the crank.
From memory (and it's sketchy) at TDC the lobes have marks facing each other and horizontal?
But I also recall they dont quite line up dead, once the TDC is located, they are slightly 'at odds' with each other.
It will run, but not brilliantly, with one tooth out as its only a degree or so.

With luck Hypersonic or someone will drop in, I know hes done this more recently and mioght be able to contribute.

It might be coincidence, there could indeed be a sensor fault.
Especially with work done that might have involved pulling the front of the engine apart.
The VTEC solenoid on the UK models requires suitable oil pressure and suitable water temperature.
If you have a temperature gauge fault then this would cause overfuelling, rough idle and lack of vtec engagement.

I have experienced this myself on other cars.
An intermittent break in the temperature sensor meant it still seemed to read 'almost' right on the dash.
But once stopped and the re-starting a hot engine it thought was cold (open temp. sensor loop) meant it brough in the enrichment program (cold start routine).
This floods the engine, or if running stalls from the over fuel.

So, check those cam timing marks at TDC, and maybe swap out the temperature sensor.

HTH
Steve.

PS - welcome to the club

 

This is correct. I helped KawasakiVTEC remove his head recently, and remembered the marks not quite lining up.

Wouldn't the temp sensor bring up a CEL if it was faulty?

 

I remember installing an engine with the timing one tooth out,it ran but produced less power than before and was kinda lumpy running.

 

I dont know if the temp sensor with throw a cel, honestly no idea.
I wouldnt expect it to though, it didnt on my Audi last time I had one fail.
You may get a cascade of errors from O2 / Misfire etc after though.

 

UPDATE :
just had the rocker off and checked timing ect and also set valve clearance when we were there , timing is spot on but unfortunately it looks like oil pressure/pump failure leading to begining of slight knock at bottom end , now i have to decide whether i go down new engine,bottom end or just do a high comp build ! what are people's thought's on high comp rebuilds and also new botom end.also rough price estimates for parts as my mechanic will rebuild for £850 labour

 

A new engine would be my port of call.