Hello guys, as the title says, may car idles high, and hard, like 4000+ rpms.
I also do know there are a lot of previous threads been going on about it and I have been through them, along with numerous searches on google, to no avail. Almost 90% of all the threads start with the problem, but never end in a solution, they just die, noone concluding in the actual fix.
But OK, here is my case:
I have replaced my '97 1.1 with a 1.6 NFZ engine at a point where the 1.1 had no more hope. I discovered that the 1.6 had also a blown head gasket, which is now replaced.
The engine runs quite OK without ICV connected! which excludes leaks. When I connect the ICV it shoots up to 4000rpm after seconds
.
The actual problem is that the ICV opens up to much when running, it is not stuck. I can actually see this happening with another loose ICV...
What I have done/replaced, but problem remained:
- another throttle body, along with TPS
- another coolant TEMP sensor
- another ICV
- taken of whole intake and put it back for inspections of warped stuff or whatever
- another crankshaft sensor
- another ECU
O2 sensor should be OK, not really old.
MAP sensor should be OK, according to place I got it from, also without MAP sensor connected is stops running immediately.
Electrical circuits checked on breaks and resistance, nothing came up.
Does anyone have another idea or has had exactly the same problem that can cause the ECU to open up the ICV like this?
Thanks alot in advance!, Rick