Poor MPG problem
#11
And then this excessive emissions fault, no idea how that happened. Sat all weekend and then bam, there it is.
#12
Well really it's not running fine.......... lousy fuel mileage but it appears to run normally as in it doesn't idle or motivate like crap. That's good..... kinda sorta. I think what is happening is the Techron woke the ECU up. Does your scan tool shoot you pending codes too? P1316 probably was near boarder line for the ECU but not enough to trip a code yet. Simplistic but I'm sure you get the idea.
This is from the GEMS OBDII.....
Excess Emissions
The percentage misfire (MF DIAG PCENT MF EMISS) is calculated in blocks of 1000 revolutions of the crankshaft using MF DIAG FIRE COUNT
EMISS I as the revolution count. If the misfire rate is high enough to exceed specified emission limits, cylinder identification takes place and a misfire
emission fault is present
We already know the motor is getting too much fuel so if you can bum a MAF and replace the IAT at least the sensor side of things will be in order. There's so much on the mechanical side of the equation though, like valve condition, timing (chain/gears), carbon, and so on.....
This is from the GEMS OBDII.....
Excess Emissions
The percentage misfire (MF DIAG PCENT MF EMISS) is calculated in blocks of 1000 revolutions of the crankshaft using MF DIAG FIRE COUNT
EMISS I as the revolution count. If the misfire rate is high enough to exceed specified emission limits, cylinder identification takes place and a misfire
emission fault is present
We already know the motor is getting too much fuel so if you can bum a MAF and replace the IAT at least the sensor side of things will be in order. There's so much on the mechanical side of the equation though, like valve condition, timing (chain/gears), carbon, and so on.....
#13
We already know the motor is getting too much fuel so if you can bum a MAF and replace the IAT at least the sensor side of things will be in order. There's so much on the mechanical side of the equation though, like valve condition, timing (chain/gears), carbon, and so on.....
The gears, valves, all that was redone 20k miles ago...it could have all gone to **** I guess, but -shouldn't-
Carbon build up could be an issue, granted.
#14
#15
Yeah I've been trying to figure out how to do that. Some dude on Discoweb came up with a program that will do it with a cheap OBDII scanner, but not the one I have, so I guess I need to buy a new one of those, too.
#16
Not sure if it's just my engine, but these things produce a good amount of carbon. My machine shop had to redo my piston rings after about 3-4k miles and said they haven't seen this much carbon build up in such a short amount of time...
#20
So if there is a random cylinder misfire at start up, why wouldn't it continue as running and throw another code? I cleared the code, started up, drove back to work. No code.