high idle - ZR-1 Net Registry Forums

Jarek5_7 · 01-19-2009

I set up tps to 0.55v and started the car. after couple of secs idle went down and fell to around 900, I waited adn when the car got hotter I reved it a little couple of times , when it went to closed loop mode idle even got higher adn stayed around 1000, but they are little lower then earlier.

the iac stayed 0, so I think it has a leak somewhere.

I was searching and after engine shutdown I heared some little sucking noise around the back of the engine. I checked hose to fuel pressure regulator and to brake booster , they are ok.

I unplugged the hoose that goes from pcv valves into front part of plenum at the driver side and ended the hose with duct tape to see whats gonna happen. now after starting the engine had around 700 rpm and idled smooth.

so faulty pcv valves? ( I dont know how this pcv ventilation works, just trying to find some diagrams of its connections in the car.)

01-19-2009	#10
Jarek5_7 Join Date: Aug 2008 Location: Radom, Poland Posts: 38	Re: high idle I set up tps to 0.55v and started the car. after couple of secs idle went down and fell to around 900, I waited adn when the car got hotter I reved it a little couple of times , when it went to closed loop mode idle even got higher adn stayed around 1000, but they are little lower then earlier. the iac stayed 0, so I think it has a leak somewhere. I was searching and after engine shutdown I heared some little sucking noise around the back of the engine. I checked hose to fuel pressure regulator and to brake booster , they are ok. I unplugged the hoose that goes from pcv valves into front part of plenum at the driver side and ended the hose with duct tape to see whats gonna happen. now after starting the engine had around 700 rpm and idled smooth. so faulty pcv valves? ( I dont know how this pcv ventilation works, just trying to find some diagrams of its connections in the car.)