So I have been having some "misfire" issues, 1-3 randomly I am just trying to find out the cause and see if I can remedy it. 07 wrx 55xxx miles- approx. 25k on rebuild blouch 18 gtx turbo process west intercooler dw 1000cc injectors dw upgraded fuel pump Not sure if any other info is needed there, shouldn't be. No other fuel system upgrades I have been running E85 (tuned by Ron) since my rebuild, about 18 months. I was doing great with the codes (just the o2 sensor one for E85) until about a month ago. I am getting random ones for cly 1-3 by random I mean, one time its 1 the next its 3 then its both then its 3 then its 1, you get the point. Plugs all changed, no I did not change coil packs and not going to just yet. I am going to data log and see what that shows (like I know what I am looking at). I am more interested in a way to find out what the fuel pressure is going back to the tank and what it should be. I am by no means maxing out my injectors, I think. I have done no engine upgrades or anything that should have required another tune. I have not gone to the gas tune to see if that would make it go away, I don't really think it would matter? I attempted to search and that just lead to confusion. Read about 1-3 being common fuel starvation cyl's but I don't know why that would all of a sudden be an issue. Don't really want to upgrade the fuel system unless that is the only fix. No, I am not going to light it on fire (just yet). Yes, I have seriously thought about going back to stock! Any logical suggestions welcome! thanks
The same ones that you had in there on the engine rebuild, out of an evo. I just pulled one and ran to the store and bought 4. The CEL does not blink. That is weird to me as well.
If you suspect it's a fuel issue, going back to gas temporarily could be a quick easy check - it requires 30% less fuel flow, and would give the system headroom if it is being topped out on E85
I have thought about going back to gas, just waiting for the tank to get super low. I have thought about switching the coil packs but it's so random and sporadic. Is this something that is in the data log? The inj. PW must be pulse width? What's the IDC? It looks like I would have to log each individually.
