cloakingzander

folks, jst thought id pick ur brains im avin a few problems wiv my st200. i seem to be suffering from power loss,rough idleing and rising revs to about 3000 wen clutch is dipped. iv ad it serviced new plugs idle control valve cleaned and also checked the irmc this seems to be working fine. u guys av any ideas?

RichieST

iTrader: (2)

Is it idling high all the time? I'd be looking at an air leak after the air flow meter, maybe split pipework/inlet manifold gasket etc.

cloakingzander

i can hear an hissing sound coming from the back of the engine but dnt know wots around that area for me to check. but its not doin it wen engine cold. so dnt know if it could be a split pipe etc effecting it.

RichieST

iTrader: (2)

Sounds like inlet manifold gasket or the manifold itself cracked, metal expanding when it gets hot so the hole appears. You can try some of that easy start stuff, spray it around where you can hear the hissing. If the revs fluctuate then bingo, you've found the leak.

cloakingzander

il try that 2moz fella. thanx for the help.

Fiddy

check the air intake pipes, clean the maf, check the throttle position sensor.

cloakingzander

where do i find the throttle position sensor?

cosmo V6

What is it like when you drive it and pull up to a junction or dip the clutch.

cosmo V6

http://z7.invisionfree.com/SouthWale...?showtopic=108

cloakingzander

wen i first start it and drive it it pulls ok except it feels like its missing on idle. wen its warm it feels like its lost power. all symptoms point to irmc but checked that and its fine. wen i dip the clutch the rvs will either stick or raise to 3000 rpm

cosmo V6

click the link


http://z7.invisionfree.com/SouthWale...?showtopic=108

Fiddy

a knackered IRMC wont cause any problems at all, bar over 3K revs the secondaires wont open, hence, you want get that big pick up in power. bar that, the car wont run any different

Glenn_

iTrader: (1)

Where is the throtttle position senor at then?

Fiddy

if you havnt already, relocate the IMRC to the battery tray as there prone to failing. its a a quick an easy job.

Mine

Glenn_

iTrader: (1)

Who did that for you fiddy.Nice shot of the throttle position sensor there in the first pic.

Fiddy

On the throttle body IIRC. its quite common for the V6 2.5 to get the symptoms the thread starter is having, and a lot of times its the TPS.

A bad TPS can have many effects:

Hesitation on acceleration
Rough idle
Jerkiness
Rough running


Might not be the TPS, may be the old throttle hang thing rearing its ugly head, but im not to clued up on the throttle hang fix, or wether it would cause the problems he is having, but throttle hang is also a common problem on 2.5 V6 Duratecs.

Fiddy

Some nice bloke from darlington with a white saff

Glenn_

iTrader: (1)

Well i would reckonmend to anyone who has a V6 mondy to move the IMRC to the battery try.I did fiddys and thought i wouldnt be able to tell the difference but i could tell that it was working right/better.

Fiddy

Thats because the old one was fooked mate, the new one actually works, the old one didnt lol.

Glenn_

iTrader: (1)

Ive heard of him but ive never seen him around.Ive heard he is a right ugly looking coont.

Fiddy

Aye, he's a bit of an ugly cunt, but he's a nice bloke, got a nice car, and his wife's a tidy boiler, how he's pulled her, ive got ne idea

Glenn_

iTrader: (1)

Lol i wouldnt mind sorting his tart out she is fit.