strange one for you guys... LET reving itself

[Jordan_turbo]

yer this is a bit of a strange one guys...

its on a C20LET running phase 2 chips on standard management/turbo etc...

after a bit of "spirited driving" yesterday i pulled up to a roundabout and when i dipped the clutch i herd the enging rev itself, when i looked at the rev counter to see what it was doing it started pliping the throttle every time the revs hit 1k, just enough to get the revs up to about 2.5k and then they would drop down till it hit 1k and did it again

had no EML up on the dash

it kept doing it until i turned the engine off and back on again and then it stopped, and it hasnt done it since.

anyone had this or know what could have caused this?

 

[rick151081]

my car dose this and its could be one of 2 things i ve been told and thats is throttle position sensor or the icv but i have an ecotec and not sure if it could be the same on the let but it could be im sure some one will be along to confirm or correct mate

 

[Stu_GLSTD]

I'd say that the ICV needs a good clean out. Normally the case on injected models. Whip it off, get some carb cleaner in there and get the **** out, put it on and test. Stu.

 

[Jordan_turbo]

yer id normaly say ICV but it only did it that once and since turning the engine off and on again it hasnt dont it at all.

thats whats strange

 

[Jaspa]

does seem strange that it was only the once.....but it does seem like icv

 

[tonyp5467]

my old astra did this it was cured by cleaning the icv out

 

[turbojay]

yeah icv imo, i had this when i first fitted my let, the icv was full of black material, carb cleaner got rid of it and since then doesnt move o 900rpm on idle