MAF voltage and load values spike down at 5600 RPM.
Posted: Sat Feb 26, 2011 11:26 pm
The car in question is a 2001 Cobra with a MAFIA set at position 2 and connected to a 90MM Ford lighting MAF. The issue at hand is that the A/F under load goes lean and the car pings at throttle tip in past 3500RPM's. Second, the A/F ratio varies from 11:1 to 18:00 under part throttle, deceleration and non boost conditions.
In an attempt to resolve the pinging and A/F fluctuations, I logged the following values: Maf, load and RPM and got this:
[Load] [MAF] [RPM]
90.1% 3.63Volts 4758RPM
97.3% 3.80Volts 5193RPM
101.3% 3.80 Volts 5690RPM
81.2% 1.99 Volts 5690RPM
14.9% 1.61 volts 5281RPM
Could a defective Mafia cause this?
In an attempt to resolve the pinging and A/F fluctuations, I logged the following values: Maf, load and RPM and got this:
[Load] [MAF] [RPM]
90.1% 3.63Volts 4758RPM
97.3% 3.80Volts 5193RPM
101.3% 3.80 Volts 5690RPM
81.2% 1.99 Volts 5690RPM
14.9% 1.61 volts 5281RPM
Could a defective Mafia cause this?