Posted in 3.4 swap area too

I swapped in a 96 3.4, since the swap i have had an extremely high idle 2400+. I have gone through as many threads I could find and nothing has given positive results. I am using BlueDriver ODII diagnostic software, when running live diagnostics it shows a warning of insufficient cooling temp for closed loop fuel control. Its not throwing a CEL but it is showing this warning during the live scan.

I have seen post stating that both o2 sensors need to be working or this could cause an issue with throwing the P0125 code. Motor only had (1) o2 sensor and that is the down stream sensor. When I did the swap I bought an aftermarket o2 sensor for the year of the motor.

I have unplugged vacuum lines and the idle has dropped to somewhat of a normal idle but it runs rough. Could I possibly have a vacuum line swapped? I haven't found a very good vacuum diagram for the 3.4 online.

Throttle position sensor. I know those are supposed to be set at a certain voltage. When I loosen the screws to adjust it while running I get momentary drop in idle, then goes back up.

IAC and AFM have been cleaned. I can unplug the IAC while running but no changes in idle. Tested ok when ohmed out same as AFM.

Temp sensor, when unplugged while running does not change idle either.


Any help would be greatly appreciated, Thanks

 

Did you do your own Harness??

If your not getting a P0505 Code for the high idle either you wired something wrong

Poor connection someplace

Throttle body is being held open by something .

Linkage hung up !!

Shaft bent ??

Cable not adjusted correct .

All your other sensors are reading in the correct range ??

Possible a bad ECM??

Your engine Harness should have had the two plugs for the o2 sensors you did not mix them up??

 

ORS made the harness

Linkage is fine

Butterfly on the TB looks to be off to one side. Like its being pulled by the springs for the throttle return. Even when forced to close it still idles high.

Thing that baffles me is that its not throwing codes. When I watch the live data I watch it climb to 186deg and then it stays around the 184 -186 mark. Down flow o2 sensor showing voltage and that its working, temp is within range.