ECU will not go into closed loop mode??

Discuss the RB20, RB25 and RB26 series engines.
ryan15
Posts: 437
Joined: Thu Sep 20, 2007 7:40 pm
Car: 1990 240sx

Post

OK well I have worked at this for a while. As the title states my ecu will not go into closed loop mode on my rb20det. I have worked at this for a while.

I have replaced/tested my:ECT sensoro2 sensortried hooking up the narrowband out put on my wideband to the ecutested the sweep on the tps... all checks outmade sure the diagnostic knob on the ecu is all the way counter-clockwiseChecked for codesChecked for boost leaks/vacuum leaks sits at 17-20inHGfuel pressure checks out... im running a 190lph fuel pump and its sits perfect at idle.cleaned my maf

I dont know what to think it is. Under boost my afr`s are 10.7-11.5 pretty much perfect. Cruising it will vary from 11.0-12.2 afr`s. The only thing I can think of at this point is the ecu is bad. I will greatly appreciate any educated inputs... I am tired of getting 15mpg for the last 6 months.

Ryan



ryan15
Posts: 437
Joined: Thu Sep 20, 2007 7:40 pm
Car: 1990 240sx

Post

Fixed it.. ended up being a bad connection... feel free to delete.

Cjmartz2k
Posts: 1845
Joined: Sat May 19, 2007 1:39 pm
Car: Hunting for a '89 GTR now
Location: Okinawa, Japan

Post

which connection just to save somebody else the possible trouble?


Return to “RB20DET / RB25DET / RB26DETT Forum”