really rich at idle and cruise

[fenderguitarist]

i just got my ecu tune from emance i originally sent it out cause of my horrible idle and cruise afr's which were 11.5 idle and low/high 10's at cruise no boost well its still like that i have a nismo fpr and have it set for 42lbs with vacuum it pulls it down to about 36-38 range i noticed on my avc-r that i have about 52 img of vacuum at idle i turned the car off and it still read 52 img im thinking i have a vacuum leak somewhere how much vacuum should the sr pull at idle?

[Fuel4Blood]

Normally most cars have between 16 and 22 inches and the needle should be steady. 58 is way to high, check for leaks.

[fenderguitarist]

oh i meant -55 img not sure if it makes a difference

[Fuel4Blood]

No doesn't make a difference I meant -16 to -22

[fenderguitarist]

just found out i have a faulty knock sensor causing the ecu to run extremely rich

[Justin35ll]

I don't know what IMG is, but I know that the vacuum at idle should be about a steady 20inhg

[Fuel4Blood]

just found out i have a faulty knock sensor causing the ecu to run extremely rich

Well its good you found that out. What pointed you in the direction of the knock sensor?

[fenderguitarist]

well i jumped to conclusions i got the code 34 from the ecu i changed the knock sensor now im all clear code 55 but my richness problem has not changed ive run out of ideas on what could be causing it

[240life]

have you tested your coolant temp sensor and double checked your timing?