Going rich when coasting.
I haven't been able to figure this out. When I coast to coming to a stop or turn it goes rich (10.9) probably 75% of the time, If I get back in the while its rich like that I get a stumble and it goes way lean. Probably from trying to correct the rich condition while the throttle is opening. I have close to 10,000 miles on the system. this has always been there. Any thoughts?
I have the same problem. See here.
I find that if I touch the throttle just enough to get off TPS zero the afr will lean out to a reasonable ratio. I will be watching this thread. Billk
If it spikes lean when you back off while cruising then runs rich, most likely you have an exhaust leak, most likely around the O2 sensor, you should look for a small black area. I found mine using a smoke generator and a 12v tyre compressor, some use a vacuum cleaner exhaust and soapy water, only takes a hole so small you cannot hear it.
Quote from flatbill on February 9, 2021, 4:51 pmI have the same problem. See here.
I find that if I touch the throttle just enough to get off TPS zero the afr will lean out to a reasonable ratio. I will be watching this thread. Billk
I see the same thing, Its like its feed the the same amount of fuel before the throttle closes. It last for a few seconds. I also noticed, forgot to add it to my first post. If I put it in open loop it doesn't do it. Which should of made my think of looking for exhaust leaks. I don't feel any leak, I should check the right way when it warms up.
I am not sure if adjusting tip out under accel pump would help. Not sure which way would add or subtract fuel.