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    Severe Problem Diagnosis...

    So I have a few issues I'm trying to straighten out, but I have no clue what to fix

    First off, my car hums and almost vibrates when driving, at any speed above 10mph. This hum and vibration goes away when I make slight right turns. What could it be? Wheel bearings?

    Another problem I have is when I shift out of park into gear and the car is cold, the car stutters and sputters and then brings its RPMs to 900 for the next minute. (Does it forget it should be in warmup mode or something)?

    The car sometimes, not often, doesn't start unless it takes some severe cranking. I'll let it crank up to 15-20 times before shutting the key and giving it another go. When it doesn't start, it takes about 3 or 4 try cranking 20 times and shutting the key off procedures. Is it the FPR?

    The brake pedal has a really soft and spungy feel. When it's pushed down to almost all way while the car is in neutral or park it hisses, like it's letting off pressure. The lines have been bled many times the past year. If it is air, we have NO CLUE how it's in the lines. Could it be the brake booster? Or is the master cylinder more likely? Oh and the brakes suck, at 45, if I slam the tires don't squeel, the car rolls to a stop.

    I get horrible gas mileage. Around 13 miles to the gallon. I have a new O2 sensor that I spliced on, the computer doesn't bring up the O2 sensor as a problem so I assume it is good. What could be the issues here? It's not a lead foot, I've really backed off on it.

    The car overheats, alot. There was a new thermostat put in last summer and the radiator was flushed. A water pump was done last summer too. When I say overheat, when it sits in traffic, it climbs to 3/4, and sometimes to red in bad traffic. The diagnostics told me 1223, which means my Coolant Temperature Sensor is having an issues.

    AC doesn't work. We charged it last summer with the old R12(I think) refrigerant, and within a week it was out of the system completely. Where is the leak most likely to be at and how do you find the leaks?

    Steering makes noises in cold weather. Steering rack going?

    The fluid in the auto trans and diff have NEVER been changed. My dad believes it is USELESS to change the fluid. He thinks it does nothing. Please tell him he's wrong in this thread.

    I know it sounds like a hell hole, but it's not bad. Although the car was in an accident, it's getting repaired because it has one of the strongest M20's I've seen. My 3000lb cabrio usually pulls an other E30 325i's. In addtion I can't find a god damn cabrio that's black with good bookwork like mine for under 5k. These bastards are asking around 9k with 130,000 miles! Mine has 108k! Last summer these cars were so much cheaper, what happened?

    Thanks!

    #2
    Re: Severe Problem Diagnosis...

    Originally posted by GreekDriver
    So I have a few issues I'm trying to straighten out, but I have no clue what to fix

    First off, my car hums and almost vibrates when driving, at any speed above 10mph. This hum and vibration goes away when I make slight right turns. What could it be? Wheel bearings?

    Another problem I have is when I shift out of park into gear and the car is cold, the car stutters and sputters and then brings its RPMs to 900 for the next minute. (Does it forget it should be in warmup mode or something)?

    The car sometimes, not often, doesn't start unless it takes some severe cranking. I'll let it crank up to 15-20 times before shutting the key and giving it another go. When it doesn't start, it takes about 3 or 4 try cranking 20 times and shutting the key off procedures. Is it the FPR?

    The brake pedal has a really soft and spungy feel. When it's pushed down to almost all way it park it hisses, like it's letting off pressure. The lines have been bled 6 times the past year. If it is air, we have NO CLUE how it's in the lines. Could it be the brake booster? Or is the master cylinder more likely? Oh and the brakes suck, at 45, if I slam the tires don't squeel, the car rolls to a stop.

    I get horrible gas mileage. Around 13 miles to the gallon. I have a new O2 sensor that I spliced on, the computer doesn't bring up the O2 sensor as a problem so I assume it is good. What could be the issues here? It's not a lead foot, I've really backed off on it.

    The car overheats, alot. There was a new thermostat put in last summer and the radiator was flushed. A water pump was done last summer too. When I say overheat, when it sits in traffic, it climes to 3/4, and sometimes to red in bad traffic. The diagnostics told me 1223, my Coolant Temperature Sensor is having an assues.

    AC doesn't work. We charged it last summer with the old R12(I think) refrigerant, and within a week it was out of the system completely. Where is the leak most likely to be at and how do you find the leaks?

    Steering makes noises in cold weather. Steering rack going?

    The fluid in the auto trans and diff have NEVER been changed. My dad believes it is USELESS to change the fluid. He thinks it does nothing. Please tell him he's wrong in this thread.

    I know it sounds like a hell hole, but it's not bad. Although the car was in an accident, it's getting repaired because it has one of the strongest M20's I've seen. My 3000lb cabrio usually pulls an other E30 325i's. In addtion I can't find a god damn cabrio that's black with good bookwork like mine for under 5k. These bastards are asking around 9k with 130,000 miles! Mine has 108k! Last summer these cars were so much cheaper, what happened?

    Thanks!
    1) Sounds like a right front wheel bearing.
    2) Possibly FPR, accumulator, or CSV.
    3) No clue, not a brake expert. I'd say bleed them, maybe flush and put in new fluid?
    4) Spliced an O2 sensor on?
    5) Are you sure the compressor is functioning properly?
    6) Where does the power steering make noises? At full lock, or throughout the travel?
    7) Slap your dad. Transmissions and diffs have moving parts, and will contaminate oil just as engines do.

    Hope I'm of some little help.

    "See, we're adding a little something to this month's sales contest. As you all know, first prize is a Cadillac Eldorado. Anyone wanna see second prize? Second prize is a set of steak knives. Third prize is you're fired."

    Comment


      #3
      Re: Severe Problem Diagnosis...

      First off, my car hums and almost vibrates when driving, at any speed above 10mph. This hum and vibration goes away when I make slight right turns. What could it be? Wheel bearings?
      Yeah, I'd say wheel bearings too.

      The car sometimes, not often, doesn't start unless it takes some severe cranking. I'll let it crank up to 15-20 times before shutting the key and giving it another go. When it doesn't start, it takes about 3 or 4 try cranking 20 times and shutting the key off procedures. Is it the FPR?
      I'd start with the fuel pumps. Pull off the line to the FPR and see if you're getting fuel while cranking.

      The car overheats, alot. There was a new thermostat put in last summer and the radiator was flushed. A water pump was done last summer too. When I say overheat, when it sits in traffic, it climbs to 3/4, and sometimes to red in bad traffic. The diagnostics told me 1223, which means my Coolant Temperature Sensor is having an issues.
      Did you change the sensor? It's only $25 to $30 list. Otherwise, did you bleed the system properly when you changed/flushed everything?

      AC doesn't work. We charged it last summer with the old R12(I think) refrigerant, and within a week it was out of the system completely. Where is the leak most likely to be at and how do you find the leaks?
      God, that must suck if you filled it with R12 cause it's over $100 a pound. The only way to find a leak is if you added a tracer dye when the system was charged, then you can use a black light to find the source. If you didn't add the dye, you'll have to charge it again to trace the leak.

      Steering makes noises in cold weather. Steering rack going?
      Racks don't make noise, pumps do. But first make sure it's topped off with ATF.

      The fluid in the auto trans and diff have NEVER been changed. My dad believes it is USELESS to change the fluid. He thinks it does nothing. Please tell him he's wrong in this thread.
      I wouldn't slap your dad, but you should change your fluid regularly.

      '86 325 2.8i stroker - Arctic Blue
      '11 328i Sports Wagon - LeMans Blue
      Strictly Eta

      Comment


        #4
        Re: Severe Problem Diagnosis...

        Originally posted by Fred
        The car overheats, alot. There was a new thermostat put in last summer and the radiator was flushed. A water pump was done last summer too. When I say overheat, when it sits in traffic, it climbs to 3/4, and sometimes to red in bad traffic. The diagnostics told me 1223, which means my Coolant Temperature Sensor is having an issues.
        Did you change the sensor? It's only $25 to $30 list. Otherwise, did you bleed the system properly when you changed/flushed everything?
        Fan clutch
        Below the radar...

        Comment


          #5
          Thanks for the responses! I'm gonna look into some of that stuff.

          I have tanks of R12 in my garage, lots of them. :D

          The fan clutch was replaced last summer, same time as the water pump and the radiator was flushed completely. All this crud came out of it. The thermostat was also replaced then too.

          Would changing the sensor help the temperatures?

          Comment


            #6
            Changing the sensor might help, but it is more that it might be reading high. How do you know that it is overheating? Just by the guage, or other?

            Andrew

            Comment

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