DavePolyakov
Member
- Joined
- Aug 3, 2020
- Location
- Shoreline, WA
1990 740 Turbo lh2.4
Did a 0-60 pull at 12psi afr's were normal this was about two hours into my doordash shift and it was boosting nicely. Upon slowing down, it began to run lean, hesitating, and low power from a stop. Afr's in the 16-17 range, drove home like this 2 miles, and stayed out of boost. At idle it may return to normal or even go rich. Upon any accelerator input, it will begin running lean. I checked all hose connections, the car has a new fuel filter, I recently used a fuel cleaning agent, a new o2 sensor, spark plugs and wires are all newish. Doesn't sound like it's misfiring. Disconnecting AMM makes it run like a car without the AMM connected. I understand this is probably a common issue, I just could use some guidance. Thanks. Also, I would love to hear from someone about how to monitor fuel pressure on a car without a Schrader valve on the fuel rail.
Did a 0-60 pull at 12psi afr's were normal this was about two hours into my doordash shift and it was boosting nicely. Upon slowing down, it began to run lean, hesitating, and low power from a stop. Afr's in the 16-17 range, drove home like this 2 miles, and stayed out of boost. At idle it may return to normal or even go rich. Upon any accelerator input, it will begin running lean. I checked all hose connections, the car has a new fuel filter, I recently used a fuel cleaning agent, a new o2 sensor, spark plugs and wires are all newish. Doesn't sound like it's misfiring. Disconnecting AMM makes it run like a car without the AMM connected. I understand this is probably a common issue, I just could use some guidance. Thanks. Also, I would love to hear from someone about how to monitor fuel pressure on a car without a Schrader valve on the fuel rail.