Quote: Originally Posted by
blubyu 
I'm running a DCR stage 3 with stock wheel.Stage 3 rail,stage 2 injectors,walboro 255lph pump.Car runs
great with sct flash but i have a strange problem.
At cruise speeds say 70mph if i climb a long hill.
Say a half mile or longer my car frequently starts
to dump extra fuel causing afr to go from 14.7 to
the 11.5 to 12 range.AFR's will stay in that range
untill i turn the car off and restart it.
Any ideas?
There are several Fuel adders, Cat over temp would be my first choice, when your under load for longer than a minute the computer adds fuel to protect the cat converters and can go as rich as 9.0:1 and stay there till the cat cools down.
I can reproduce those condition on my Chassis Dyno as I have Eddy Current Load Motors, and monitor Cat temp.
There are also Fuel adders for Knock, this would be my second choice, the longer you are under load the more chance of knock so again the computer adds fuel to suppress knock also as rich as 9.0:1
For these there are timers that have to run out before normal A/F is resumed.
All Computers have a LIMP MODE, and there is a possibility your entering it, if in fact you have to power down to get back to normal A/F.
FYI I have put several SRT4s in Limp mode, in fact there are several levels of limp mode 6 that I know of, and he may be just entering level 1.
Sorry Duster, I will have to disagree with you on this one.
Ted.
