OP
Slow starting (already replaced the fuel pump with a Bosch unit)
- Thread starter SeizeTheKarp
- Start date
In addition to monitoring catalyst efficiency, down stream sensors set the goal voltage for the upstream sensors for fuel control.
During closed loop operation the LTFT values should allow the upstream sensors to operate close to zero.
OP
The system is adding or at least attempting to add more fuel.
Why? Unfortunately, quite a number of things can cause it. Starving for fuel (bad fuel pump pressure, clogged injectors), vacuum leaks, exhaust manifold leaks. Those are probably the best candidates.
OP
I recorded some stuff from the obd port for about 10 minutes. From start to finish my intake manifold pressure was roughly 11 so im hoping that indicates no leaks before the engine
OP
if its not a minor problem it should be far more apparent. hopefully the slow starting is linked and this is all a result of the fuel pump not sending enough gas.
OP
So an update. New fuel pump got here. Swapped it in at my lunch (really do love having that access panel) and things are looking A LOT better. Drove it back to work and recorded things one the way back these are the avg. ignore the min/max those are not recorded values
