i'm trying to chase down what's causing the richness on my a6, so i made sure all the lines and map it's self is holding a vacume (tb inlet allows air, but v slowly). then tried running a small paper clip into the inlets (but didn't feel any obstructions)..this of couse didn't help.

so i'm thinking maybe squirt some carb cleaner into a bit of hose and shoot it into the intake w/ an airblower. (maybe repeat several times) anyone ever done this or heard of this helping out, i ask this cause the ecu is so dependendent on this sensors output.

2 add on Q's
-anyone got a link on how to clean the (iac/egr whatevah it's called) on the intake mani
-could a too cool thermostat cause the ecu to think the car is still warming (or requires mild choke)

HT

 

Yes - too cool a thermostat will not let the ECU get into closed loop operation because it still thinks the engine is below 180*F.

To clean the IACV - remove it and shoot carb cleaner through it till it runs clear.

 

thanks man

the car has been running quite cool, yet no flux in temp on the gauge

will knock out that iacv tomarrow and see what happens.