my dohc 1.5 RPM problem

[modo132]

my engine stares well but after afeow minuets it raised to 2000rpm and never get back unless i restart it

[Daniel]

Does the orange engine warning light comes ON when in problem?
Does it the same problem if just before revs up you remove the connector of IAC (idle air control) valve?

What car?
Model year?
How many miles/km?
Maintenance as per manual?

[chriscomputers]

Check the Idle mixer module on the throttle body. I think that is what it's called. My Daewoo Lanos used to do that. Take the module out and clean it off with carb cleaner and a rag. There was so much gunk on mine I had to wipe it. Before I fixed it I would just reset the ECM to make it go away until it happened again every 2 months or so.

[modo132]

its a96 nexia thanks for your replay's
the chekh light is allwayes on ,when i suck that thin hose witch is connected to that black device beside to the steering oil tank the engine speed becomes perfect
put wn i replace it again into the manifold it raise up

[Daniel]

Take the opportunity that the check light is ON to pull the code(s) by the paper clip method.
Here for the Espero. Same for Nexia.


how to http://www.youtube.com/watch?v=sRoSMhEL3Ms