4age Bigport Running lean

[Kwan]

Hey guys I just did a quick dyno run on my car. We had to cancel the run because it was running lean. I've checked fuel pressure at the fuel line into the fuel rail and it is fine. Just wondering what else could cause it to run lean. I've been thinking map sensor or injectors. I found the part number 89420 017010 on the MAP sensor which is hope fully the correct one.

[pen15]

whats lean do you have the lamda or afr spec? i would guess you are getting an off reading to the sensor up the end of the exhaust do you retain a cat converter?

[timbo]

a vacuum leak will make a motor run lean, so check all hoses and gaskets on the intake manifold.

[Casey-G]

As above and above.


Exactly how lean is it running under load @ say 4500rpm?

is it knocking? are the plugs white? ect...?


Is your timing set correctly?

[lolwat]

checking for leaks, use carby cleaner, spray all vacum hoses and all around the intake mani gasket and the mani itself, you will notice it will idle high or stall if you hit a leak