Several Problems, getting discouraged...
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Several Problems, getting discouraged...
Ill start with the problem that's been occurring the longest. Here goes.
Terrible gas mileage! I have done absolutely everything to help it, o2s, fuel filter, spark plugs, air filter, tire pressure, cleaned MAF, EVERYTHING! If anything, it is getting worse... The mileage has dropped to about 14.5 in the city over the past year or so, so it's not a seasonal thing. I used to get 17.5 around town. It's an M6 with a fairly new clutch, and a good tune. I've had the tune for over two years, and tunes cant go bad so that's not the problem.
Hard starts. Maybe 1 in every 4 starts it will take several seconds to start. I've already tested the fuel pressure and found that when I turn the key on it spikes to 60psi then falls to 55 immediately, then after a couple seconds, falls off down to zero (which takes about 45 seconds).
Idle problems. Most of the time, whether the engine is hot or cold, when I slow down to a red light and I push in the clutch the rpms will hang around 1300 for a few seconds. After i come to a complete stop and wait 1 or 2 seconds it drops to the normal 800. I can even sometimes be in 4th gear at about 30-35 and let off and not decelerate, the car is just being pulled...
A/C stops blowing after a long period. Okay so here in Texas it is about 100 degrees everyday, and driving to and from college (about an hour and a half) i run my a/c on full blast. After about 45min to an hour into driving my a/c stops blowing hard, full blast feels even lower than the low speed. However, I can here the blower motor working as hard as ever, maybe even louder, but the air just isnt passing through the vents...
Random SES lights, most of them being lean codes in banks 1 and 2... They go off in a day or two, but maybe come back a couple times during the week.
Bad squealing coming from the front left wheel. It started off being just a short, but loud squeal when i would brake at low speeds and turn. Now it will squeal on bumps and if i make slow turns even without applying the brakes... Im thinking it's the wear sensors on the pads, the rotors are really warped and I will be doing a full brake job soon.
Any input greatly aprreciated, thx guys.
Terrible gas mileage! I have done absolutely everything to help it, o2s, fuel filter, spark plugs, air filter, tire pressure, cleaned MAF, EVERYTHING! If anything, it is getting worse... The mileage has dropped to about 14.5 in the city over the past year or so, so it's not a seasonal thing. I used to get 17.5 around town. It's an M6 with a fairly new clutch, and a good tune. I've had the tune for over two years, and tunes cant go bad so that's not the problem.
Hard starts. Maybe 1 in every 4 starts it will take several seconds to start. I've already tested the fuel pressure and found that when I turn the key on it spikes to 60psi then falls to 55 immediately, then after a couple seconds, falls off down to zero (which takes about 45 seconds).
Idle problems. Most of the time, whether the engine is hot or cold, when I slow down to a red light and I push in the clutch the rpms will hang around 1300 for a few seconds. After i come to a complete stop and wait 1 or 2 seconds it drops to the normal 800. I can even sometimes be in 4th gear at about 30-35 and let off and not decelerate, the car is just being pulled...
A/C stops blowing after a long period. Okay so here in Texas it is about 100 degrees everyday, and driving to and from college (about an hour and a half) i run my a/c on full blast. After about 45min to an hour into driving my a/c stops blowing hard, full blast feels even lower than the low speed. However, I can here the blower motor working as hard as ever, maybe even louder, but the air just isnt passing through the vents...
Random SES lights, most of them being lean codes in banks 1 and 2... They go off in a day or two, but maybe come back a couple times during the week.
Bad squealing coming from the front left wheel. It started off being just a short, but loud squeal when i would brake at low speeds and turn. Now it will squeal on bumps and if i make slow turns even without applying the brakes... Im thinking it's the wear sensors on the pads, the rotors are really warped and I will be doing a full brake job soon.
Any input greatly aprreciated, thx guys.
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A/C stops blowing after a long period. Okay so here in Texas it is about 100 degrees everyday, and driving to and from college (about an hour and a half) i run my a/c on full blast. After about 45min to an hour into driving my a/c stops blowing hard, full blast feels even lower than the low speed. However, I can here the blower motor working as hard as ever, maybe even louder, but the air just isnt passing through the vents...
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Sounds like a bad vacuum motor in the dash. The doors in the vent. box are controlled by these, and when they start to go the doors will sometimes be in weird positions. Could also be the connection on the back side of the temp control switch, which is actually a vacuum porting valve, or the switch itself may be puking. Same with the heat/vent/A/C switch.
So it could've just popped off randomly? I haven't taken off my intake in a while but maybe i didn't get them all connected really well or something.
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The one in your dash...with the heat and A/C controls.
Possibly it came off, but not likely if you haven't been in there messing around. It's probably in your dash.
Possibly it came off, but not likely if you haven't been in there messing around. It's probably in your dash.
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Alright guys i found the vacuum leak. The little hose that runs into the intake manifold behind the throttle body on the passenger's side had a hole in it. I think it's part of the a.i.r. system? So now my idle is fine and hopefully ill get a little better gas mileage and no more codes.
#13
I've experienced the same terrible drop in gas mileage. I used to get around 18mpg also, and then it dropped to somewhere around 14-15. On the best days I would get to around 80-90 miles until the needle crossed the 3/4 full mark, and on this current tank it was only 55-60 miles.
I plan on changing the fuel and air filter and possibly doing the spark plugs and wires too. Hopefully it helps....
I plan on changing the fuel and air filter and possibly doing the spark plugs and wires too. Hopefully it helps....
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I've experienced the same terrible drop in gas mileage. I used to get around 18mpg also, and then it dropped to somewhere around 14-15. On the best days I would get to around 80-90 miles until the needle crossed the 3/4 full mark, and on this current tank it was only 55-60 miles.
I plan on changing the fuel and air filter and possibly doing the spark plugs and wires too. Hopefully it helps....
I plan on changing the fuel and air filter and possibly doing the spark plugs and wires too. Hopefully it helps....
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Im gonna warranty out my o2 sensors for some new ones just to see if that's the problem. I might as well since it's free. They are bosch 13111 o2s btw.
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I've wondered about them but I just don't know of a way to tell for sure. They are the magnaflow cats that come in the tsp catted y-pipe and they're about 2 years old. I don't know if those particular cats are prone to clogging or not? Any symptoms of bad/clogged cats?
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Bump. Still hard to start and still bad gas mileage. o2's are brand new.
Could the starting problem be a bad fuel pressure regulator? I have a fuel pressure gauge to hook up to it, but im not sure what the pressure should look like during the test. It spikes at 60 when i turn the key on then falls to 55 immediately, then proceeds to steadily fall off to zero (takes about a minute to get to zero).
Could the starting problem be a bad fuel pressure regulator? I have a fuel pressure gauge to hook up to it, but im not sure what the pressure should look like during the test. It spikes at 60 when i turn the key on then falls to 55 immediately, then proceeds to steadily fall off to zero (takes about a minute to get to zero).