I'm struggling with a really rich cold start condition on my 04 GT. It has a tork tech blower on a stock long block.
Here is what happens. The car fires, flares to 1500 and stalls unless I pedal it a little to keep it running. I see some black smoke initially but a wicked rich exhaust smell. After a few seconds it will idle by itself and when my LC2 wideband heats up and reads, it shows a 10.5 AFR.
Once the fuel source flag goes from 4 (cold start base fuel) to 0 (closed loop) the AF leans out to a nice 14.7 idle and all is well.
-Once warmed up the car behaves fine
-The MAF xfer is correct at hot idle
-The cold base fuel table is calling for if anything a hair off lambda at the rprm/temp it sees in cold start
-The "base fuel table enleanment table" is all 0's
I was told it may be something like a program glitch and it was suggested to me to scale the cold base fuel table leaner in 10% increments until it reads right. I'm going to try this but I only get one or maybe two shots per day to verify so I figured I'd post and see if anybody has seen this before. If so what was the fix??
Here is what happens. The car fires, flares to 1500 and stalls unless I pedal it a little to keep it running. I see some black smoke initially but a wicked rich exhaust smell. After a few seconds it will idle by itself and when my LC2 wideband heats up and reads, it shows a 10.5 AFR.
Once the fuel source flag goes from 4 (cold start base fuel) to 0 (closed loop) the AF leans out to a nice 14.7 idle and all is well.
-Once warmed up the car behaves fine
-The MAF xfer is correct at hot idle
-The cold base fuel table is calling for if anything a hair off lambda at the rprm/temp it sees in cold start
-The "base fuel table enleanment table" is all 0's
I was told it may be something like a program glitch and it was suggested to me to scale the cold base fuel table leaner in 10% increments until it reads right. I'm going to try this but I only get one or maybe two shots per day to verify so I figured I'd post and see if anybody has seen this before. If so what was the fix??