Lean AFR's up top.
#17
Evolved Member
iTrader: (34)
The car behaves the same way even when its locked in open loop mode at idle and cruising btw. The car also kind of idles unsteady not in keeping with gsc s2 lope and 1000ish rpm idle. At cruise and gentle acceleration into boost it feels like the car is misfiring sporadically.
#22
EvoM Guru
iTrader: (50)
Any chance there have already been a few attempts to richen the fuel map? I have been thinking the entire time that despite having replaced the pump and the sock, it's still a fuel delivery issue. The filter in the pump carrier could be clogging or for some reason the pump isn't getting good voltage.
#23
I know I'm a Newbie but I like to read a lot on evolution.net about EVERYTHING! I own an Evolution 8 RS WW beat up and in need of some TLC but I drive it as my DD and repairs / upgrades are coming along.
Back to your problem though - I have read recently that there are 3 fuel pump relays in the fuel line and I would get a meter out and check them for proper voltage sounds to me like 1 or more are not working correctly and would cause your fuel pump to not add fuel correctly. Just my 2 cents on my first post ever.
Back to your problem though - I have read recently that there are 3 fuel pump relays in the fuel line and I would get a meter out and check them for proper voltage sounds to me like 1 or more are not working correctly and would cause your fuel pump to not add fuel correctly. Just my 2 cents on my first post ever.
#24
Any chance there have already been a few attempts to richen the fuel map? I have been thinking the entire time that despite having replaced the pump and the sock, it's still a fuel delivery issue. The filter in the pump carrier could be clogging or for some reason the pump isn't getting good voltage.
a) buy a new carrier as I have read it is not serviceable.
b) go double pumper? lol. I heard they don't have that filter.
Back to your problem though - I have read recently that there are 3 fuel pump relays in the fuel line and I would get a meter out and check them for proper voltage sounds to me like 1 or more are not working correctly and would cause your fuel pump to not add fuel correctly. Just my 2 cents on my first post ever.
The 2 idea you guys have provided are very very possible. I shall look into those. I'll check back as well.
#25
EvoM Guru
iTrader: (50)
Thanks for racking ur brain for me, I do appreciate it! I too have been stewing about this issue. So if the filter in the carrier is clogged, what are my options. Im assuming
a) buy a new carrier as I have read it is not serviceable.
b) go double pumper? lol. I heard they don't have that filter.
...
a) buy a new carrier as I have read it is not serviceable.
b) go double pumper? lol. I heard they don't have that filter.
...
#26
Evolved Member
iTrader: (6)
Make any progress on this?
I have an EVO9 that was running on e85 and making 450whp. I recently switched back to pump gas and wanted to bring my AFR down to match the fuel. I can't keep AFR under 12:1 from 5k on up. I even dropped the fuel map down to 8.0 which should be flooding the car with fuel. If the fuel system could keep up with the demands of E85 why can't it produces lower afrs when the demand is lessened?
For what its worth my injectors are FIC1100 HI with a walbro 255 (not punched). Help!
I have no idea how or where to measure the voltages or pressures with stock ECU and EVOScan I don't see anything.
I have an EVO9 that was running on e85 and making 450whp. I recently switched back to pump gas and wanted to bring my AFR down to match the fuel. I can't keep AFR under 12:1 from 5k on up. I even dropped the fuel map down to 8.0 which should be flooding the car with fuel. If the fuel system could keep up with the demands of E85 why can't it produces lower afrs when the demand is lessened?
For what its worth my injectors are FIC1100 HI with a walbro 255 (not punched). Help!
I have no idea how or where to measure the voltages or pressures with stock ECU and EVOScan I don't see anything.
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