March 20, 201213 yr Hi guys borrowed a friends consult got these readings, how do they look to the experts cmfs/rpm 712rpm mas air/fl 1.28v thrtl pos 0.46v iacv-aac/v 24% coolant temp 81 celcius m/e f/c mnt= lean battery 14.00v vhcl speed 0 mph o2 sensor - 0.22v a/f alpha 99% ign timing 15btdc inj pulse 2.47 msec inj duty 1.67% any help appreciated thank you.
March 21, 201213 yr Hi guys borrowed a friends consult got these readings, how do they look to the experts cmfs/rpm 712rpm mas air/fl 1.28v thrtl pos 0.46v iacv-aac/v 24% coolant temp 81 celcius m/e f/c mnt= lean battery 14.00v vhcl speed 0 mph o2 sensor - 0.22v a/f alpha 99% ign timing 15btdc inj pulse 2.47 msec inj duty 1.67% any help appreciated thank you. Hi, this is what I think......... but there are a few posts about these figures... cmfs/rpm 712rpm - good mas air/fl 1.28v - OK thrtl pos 0.46v - good iacv-aac/v 24% - too high, should be 15% coolant temp 81 celcius - good m/e f/c mnt= lean - OK battery 14.00v - good vhcl speed 0 mph o2 sensor - 0.22v - irrelevant unless static... should be going up and down a/f alpha 99% - OK ign timing 15btdc - kind of irrelevant as the ecu makes it that. (the timing should be checked with a timing light) inj pulse 2.47 msec - not sure, but I think a bit high inj duty 1.67% - Good Edited March 21, 201213 yr by Medallion Man
March 21, 201213 yr this is other info I have (been told, given).... > Closed Throttle Position > TPS 0.44-0.46 > Timing set at 15 Deg > IACV-AAC/V 15% > Mas Air Flow 1.30v + P/N position switch: ON > Injector Pulse 2.2 msec > Injector Duty 1.61% average values for STANDARD injectors (at idle) may vary slightly between cars > A/F Alpha 109% this is an average value and only works if you have fully functional O2-sensors and ideally you want this value to be close to 100%. any value over or under 100% means the ECU has to compensate with less or extra fuel to get the mixture right. Extreme compensations (> +/- 15%) usually mean something is wrong with either air (airleaks) or fuel (injectors/fuel pressure) > Water Temp 80 Deg C-84 Deg C > Fuel Temp 25 Deg C-35 Deg C NB: the fuel temp values are ignored by the ECU for the most part, so not really important in respect to getting the car running better . battery voltage: should be between 13.7 and 14.3 Volt (at any rpm) If the value is off, it may indicate (future) problems with the alternator the timing should always be verified with a timing light. Also the later Zeds don't follow the 15 BTDC at idle rule. They work quite different and use a variable ignition timing system to get better emissions ratios. Because of this the timing hovers between 5-10BTDC at idle.
March 21, 201213 yr I'd say simple checks first... check all connectors (and the MAP one).. check the timing with a timing light...
March 21, 201213 yr Author Thank you for the reply,Didnt expect that much writing lol. Sorry for making you write it all check timing tomorrow. And connectors. And post up the differance. The iacv one seems most out then hopefully it will change tomorrow. Edited March 21, 201213 yr by Terry
Hi guys borrowed a friends consult got these readings, how do they look to the experts
cmfs/rpm 712rpm
mas air/fl 1.28v
thrtl pos 0.46v
iacv-aac/v 24%
coolant temp 81 celcius
m/e f/c mnt= lean
battery 14.00v
vhcl speed 0 mph
o2 sensor - 0.22v
a/f alpha 99%
ign timing 15btdc
inj pulse 2.47 msec
inj duty 1.67%
any help appreciated thank you.