New MAF, my RS sucks below 4k RPM
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I run through the scan gauge again but last time it wasn't showing anything new.
No, I haven't changed it since I owned the car so I figured it be a good time to change it anyway since it might be the problem.
How would I determine that? Just listen to them?
Does a MAF have to get "warmed up" or "learn" anything? I drove around to 2 local meets tonight and it was acting the same the whole time... the on the way home, either I'm getting used to it, or it's 100% better.
Oh well we'll see today how it runs.
So it sucks again this morning and on the way home. I was suggested to do a compression test... I'll be looking in to that tomorrow or Saturday morning then.
just so you know a maf sensor and a front O2 sensor can cause each other to go bad. or make it look like the other. but you replaced both of them soo that out. a compression test doesn't matter. if it didn't act up at the meet then it electrical. if it was mechanical then it would alway act up. have you checked fuel pressure? not just pressure but an actual reading - i don't know the spec but some one will. (stupid question but did you get the right sensors?)
james
james
No I haven't checked it. I think somethings up cause I can tell the car wants to go but something is holding it back, i.e. not enough air/fuel. I don't know how to check that...? I was just going to take it back to my Subaru buddy.
New!
Today I the way home I got a P0170, Fuel Trim (Bank 1).
Today I the way home I got a P0170, Fuel Trim (Bank 1).
I listened very carefully and the only hissing I can hear is from the CAI
Sup man. Bad idea just replacing parts and expensive. Honestly the worst thing to do is just just start replacing stuff that doesn't need to be replaced. When your friend that works on subarus said your maf was bad what were the symptoms? What was your car doing? I'll try to work from the beginning because everyone spouting off random ideas.
It wouldn't start unless WOT, and only like 25% of times at best. As soon as I unlplugged the MAF it started and ran "ok". The idle was also horrible.
That's odd. Because the three maf's I've blown there was no way the car could start. It would idle for a couple seconds then die. Of course as soon as it was unplugged it would run. Are you sure you're IAC isn't screwed up? You said you had a code before you put it into limp mode right? Did you mess with the Iac sensor at all? I know when my friends Iac went his idle was crazy shitty and got horrible gas mileage. It was hard to diagnose because he wasn't getting a code for it. He'd get all these "phantom" codes and tried everything like changing his 02's and all that stuff. Do you have a multimeter? The Iac should only be a 2 wire sensor. Probe the signal wire with a pin and attach the positive lead to it and ground the negative lead. I'm not 100 percent sure what it should read because I've never looked up what it should be at but it should be reading 5 volts with the car on. Your buddy at the subaru dealer should know how to check it. It's been a while since I've done it so he should be able to look it up. Or it should say in the subaru manuals. Also there is a special way to set them up. If you unscrew it and put it back you can mess everything up. You'd need to take it to a dealer to be able to have it reset. I'm not saying it's right but if that's the code you were getting first I'd start with that.
That was the original code I was getting, for an IAC. How would that affect the problem now of bogging at low RPM + high throttle and low Vacuum pressure?
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