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Oldsmobile engine repair questions and answers

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  • AutoMD Member
    AutoMD Member - 2004 Oldsmobile Alero - Engine - 4/14/2014
    Alero won't start, silent when I try to turn engine, dash lights up, no security light blinking?
    Hello all, I have an '04 Olds Alero; bought in 2009. Engine always ran great with minimal upkeep. New battery at Christmas. Drove car Sunday afternoon and it seemed normal; no odd behavior. Got in Sunday night and it wouldn't start - dash lights up but no sound ...
     
    • HouseCallAuto
      4/14/2014 HouseCallAuto
      You could simply have a bad starter. Try banging on the starter while another turns the key and if that gets it to start then that would confirm a bad starter. There can be other causes but lets start with this first. If that does not do anything then that means you will have to use a 12 volts test lamp and follow further instructions and do a circuit test. Can you do that?
  • AutoMD Member
    AutoMD Member - 1992 Oldsmobile Cutlass Supreme - Engine - 4/13/2014
    Car engine won't catch when trying to start it
    The transmission is about to go on the car. Car died once yesterday when not given enough gas (husband's explanation). Today,the battery will work as we try to start the car, but the engine won't catch. I saw the low fuel light come on yesterday when the car was ...
     
    • AutoMD Member
      4/13/2014 AutoMD Member
      Update. I purchased 2 gallons of gasoline from a station a bit away from home and carried it home (neat trick wearing a back brace and using a cane after back surgery). Gas was placed in tank and car fired right up. First stop tomorrow, gas station with the last $5 on us, then bank for more money, then more gas!!!!
  • AutoMD Member
    AutoMD Member - 2002 Oldsmobile Intrigue - Engine - 4/7/2014
    My fuel gauge does not work
    My fuel gauge stays on full all the time. I get a whining noise from the left rear speaker and then my gauge drops to empty. My fuel pump is fine though.
     
    0 answer
  • michael
    michael - 2001 Oldsmobile Alero - Engine - 4/6/2014
    Why won't fuel pump kick on?…
    Sometimes it will start. Sometimes it won't…
     
    • Pepe
      4/6/2014 Pepe
      You really need to test the fuel pressure to know if the pump is failing, are you assuming the pump isn't working because you can't hear it prime?
  • AutoMD Member
    AutoMD Member - 1998 Oldsmobile Regency - Engine - 4/6/2014
    I replaced my MAP Sensor, why am I getting a misfire now?
    My car started driving and idling rough, and I decided to take it in to a mechanic to get it looked at. The diagnostics test brought up a few problems, including a bad Ignition Module and Ignition Coil. I replaced both of those, and it was a little smoother but was ...
     
    0 answer
  • Amy
    Amy - 1998 Oldsmobile Aurora - Engine - 3/23/2014
    Car won't start
    Ran hot last time drove, never started up again once I shut it off. Don't turn over, no lights but battery isn't dead
     
    • HouseCallAuto
      3/23/2014 HouseCallAuto
      Tell me about the overheat in detail. How hot do you think it got? How long was it driven hot? A car that will not start after it cools down from a severe overheat usually means bad news, warped cylinder heads, ;low compression. Can you attach a code reader and see what fault codes might be stored?
  • AutoMD Member
    AutoMD Member - 1994 Oldsmobile Cutlass Ciera - Engine - 3/21/2014
    Car is hard to start, pumping accelerator finally gets it going backfires but will finally start. Runs fine when warmup
    replaced fuel filter, check MAF, replaced IAC sol and TPS sensor. Had ICM checked fine.
     
    • CVO
      3/16/2014 CVO
      FUEL SYSTEM PRESSURE
      1994 Oldsmobile Cutlass Ciera 3.1L SFI OHV 6cyl
      The Fuel System Pressure


      41-47 PSI (Pounds per Square Inch)Position the ignition switch and the A/C system in the off position. Install a fuel pressure gauge to the vehicles fuel pressure regulator valve. Confirm that no leaks are present, and momentarily spin the engine over. Visually verify the PSI reading on the gauge.
      If the fuel system isn't in the criteria, replace the fuel pump.
      CVO
      3/16/2014 AutoMD Member
      Thank you for your response. Would this be the same check as a 9-13 psi at the fuel rail (shrader valve)? I'm not sure where the fuel regulator valve is located. I will look on line for a location.
      CVO
      3/16/2014 CVO
      Check this : The cold start valve (not controlled by the ECM/PCM) provides additional fuel during the starting mode to improve cold start-ups

      See this url http://www.autozone.com/.../...rGuideContent.jsp
      CVO
      3/17/2014 AutoMD Member
      Checked fuel pressure at the fuel rail check valve (located after pressure regulator). Reads 20psi with engine running, drops to 18-19 when accelerated depressed.
      CVO
      3/17/2014 AutoMD Member
      There are no cold start valves listed for this vehicle that can be found. Are you sure about this valve and vehicle?
      CVO
      3/17/2014 CVO
      Before starting the car, spray the starting fluid or carburetor cleaner through the throttle valve body, then start the engine. In the event if the car starts, the fuel pump is the problem.
      If the fuel pump is not delivering adequate fuel pressure and volume to the engine, the engine may not start or run properly. Low fuel pressure can cause hard starting.
      CVO
      3/19/2014 AutoMD Member
      fuel pressure at shrader valve is 12psi, ignition on, ac off. What it the proper pressure? Chilton repair manual gives 9-13psi as the proper pressure. Replaced fuel regulator and spark plugs replaced upper intake manifold gasket. Still hard to start. Still starts hard and rough until warmed up.
    • HouseCallAuto
      3/19/2014 HouseCallAuto
      The proper fuel pressure for this vehicle is 41 to 47 psi. if you are s aying that you have 12 psi at the rail and you are certain that your test gauge is accurate and you do not have a leaky test hose connection then the fuel pump is junk.
      HouseCallAuto
      3/21/2014 AutoMD Member
      I guess my comment did not make it. Here it is again. There seems to be misunderstanding here. In reading a Chilton spec book for this vehicle it states fuel pressure should be 9-13psi. I am reading 12psi at the fuel rail test point. My car runs fine once warmed up it just is junk until it finally gets warm. Is there something different with this engine? It is the factory 1994 3.1 3100 delivered in this vehicle and it only has 35K miles on it. Is it not fuel injected, or ported or someth
    • HouseCallAuto
      3/21/2014 HouseCallAuto
      I repeat. The fuel pressure for a '94 Cutluss Ciera with the 3.1 liter multi-port fuel injected (MFI) engine IS NOT 9 to 13 psi. 9-13 psi is fuel pressure for a throttle body equipped engine that has one injector. Your 3.1 has 6 separate injectors and CANNOT run on 9 - 12 psi as it needs to see 41 to 47 psi. Further example - the '92 Oldsmobile Ciera with the 2.5 liter engine calls for 9 - 13 psi. Final answer on this subject of your fuel pressure for the vehicle you listed and confirmed again as the correct vehicle. Your Chilton spec book is incorrect.
  • AutoMD Member
    AutoMD Member - 1998 Oldsmobile Cutlass - Engine - 3/20/2014
    Why does my car start only when it wants to?
    Within the past 6 months I have had trouble with my car starting. We have replaced the battery. I've tried to correlate with the weather, gas, lights, brakes, & I come up with nothing. The ABS light will come on at random, as does the fluid level light. My Dad has ...
     
    • Jimm
      3/20/2014 Jimm
      In a word; possibly. Recognize the engine needs three components to start and run; spark, fuel and air - any one of these that are 'out-of-balance' could cause the difficult statring issues.

      When you say...'trouble with car starting..' - please clarify what this means. Does this mean the engine will turn over (starter works OK) but takes long time to run? Does this mean the engine / starter does not work all the time when the ignition key is turned?

      As the first step - have the OBD (on board diagnostics) system checked (scanned) for any stored fault codes. This can be accomplished free - at any local auto parts store. Then, post a reply with any fault code results for further assistance.
  • AutoMD Member
    AutoMD Member - 1998 Oldsmobile 88 - Engine - 3/18/2014
    Is it the ground to computer or main harness
    my car died on me about a month ago while i was driving it, i pushed it off the road and i got mad and slammed the steering wheel up then it started. well it was fine until about two weeks ago it happened when i was parked. so i messed with the steering wheel and it ...
     
    • Jimm
      3/18/2014 Jimm
      Please clarify...'messed with steering wheel and it started'? What exactly does this refer to? Please post a reply with additional details for further assistance.
      Jimm
      3/18/2014 AutoMD Member
      did u get my message?
      Jimm
      3/18/2014 AutoMD Member
      just tilted the steering wheel up and down. but now its dead like a dead battery, but the battery is not dead. does the ground problem sound about right?
    • Jimm
      3/18/2014 Jimm
      Most likely there is a broken or damaged wire, or damaged wire harness inside the steering column or steering wheel. Just my guess - especially since it sounds ignition or switch related.
      Best to have a trusted repair shop have a look to determine the exact issue. To find a repair shop, use the AutoMD website and the 'Find-A-Shop' feature.
    • HouseCallAuto
      3/18/2014 HouseCallAuto
      The 98 Olds has an ignition lock cylinder that has two tiny small wires attached to it. These wires are for the security circuit that reads the resistor value of your resistor pellet that is embedded in your ignition key. There is a way to bypass this system. Just google "Passkey bypass" and follow the instructions. The reason moving the steering wheel got it to start is because you temporarily allowed the two broken ends of one of the two wires to touch each other when you tilted the wheel up. The wire breaks off and leaves no room for a repair of the wire to be made. The only way is to bypass the system or to replace the ignition lock cylinder which will come with a long wire attached to it that gets routed down the steering column and plugged in.
      HouseCallAuto
      3/18/2014 AutoMD Member
      so you dont think its a grounding problem? the one guy i asked said it was a ground to the computer or main harness and its really common in this type of car
      HouseCallAuto
      3/18/2014 AutoMD Member
      i looked at the passkey bypass and that might be it but it says something about a alarm or secerity light that will flash. well mine has nothing its totally dead. no lights come on at all. still think its this?
    • HouseCallAuto
      3/18/2014 HouseCallAuto
      If the instrument panel does not illuminate when the key is turned to "on" then no that would not be it. You did not mention that the electrical system was dead in your original post. I hope that I am understanding that correctly. The vehicle is dead as in do not even have headlight function? How just a few scraps of info change everything. I would however check the battery cable that runs from the negative battery terminal to the engine though.
      HouseCallAuto
      3/18/2014 AutoMD Member
      yea their are no lights or anything, just seemed weird to me the last couple times when i tilted the steering wheel it worked. so do u think it could be like one person said the ground to the computer or the main board? or do u think its in the steering column? the one person said oldsmobile has a history of the grounds doing that?
    • HouseCallAuto
      3/18/2014 HouseCallAuto
      No, if you have no headlight function as well as all dark when you turn the key on then your cause is easier to find. Start at the battery positive and negative cables. The positive cable feeds battery voltage to the underhood fuse panels to very high amperage fuses. Check these fuses as they should have 12 volts on both sides of the fuses at all times, even with the key off. There is just one main ground, the negative battery cable goes from the negative terminal of the battery to the engine. make sure that all the connections are clean and tight. Check for corrosion inside the battery terminals under the vinyl covers of the battery terminals. If you are not a little mechanical you will have to have someone alse check these things.
      HouseCallAuto
      3/19/2014 AutoMD Member
      ok thanks but can u tell me why when i tilted the steering wheel the last few times it worked then and not now?
      HouseCallAuto
      3/19/2014 HouseCallAuto
      No I cannot relate that to anything but what I detailed earlier.
  • AutoMD Member
    AutoMD Member - 1989 Oldsmobile Cutlass Ciera - Engine - 3/18/2014
    Car quits when you touch the throttle
    put new throttle position sensor, new fuel pump, new fuel pressure regulator on and car will start fine however when you touch the gas pedal the car quits. could the map sensor be what went out of it?
     
    • HouseCallAuto
      3/18/2014 HouseCallAuto
      Try unplugging the electrical connector from the mass air flow sensor and if that stops the stalling issue replace the maf sensor. Don't replace it if there is not substantial improvement and stops the stalling when you feed gas.

      The maf *might* be your problem but my mechanic intuition says that a much more common issue is your cause and this is the most overlooked cause on GM cars between the years 87 to 93 that were fuel injected. The fuel injectors were called "multec" and had a severe propensity to failure resulting in a myriad of issues that did not ever go away. Mechanics often end up throwing the entire auto parts store at the car in a futile attempt to solve the cause of these huge symptoms. That being said..

      1. Check fuel injector resistances.

      2. Should have over 12 ohms at each injector.

      3. If two or more have less than 12 ohms, replace all six injectors, road test.
  • AutoMD Member
    AutoMD Member - 2000 Oldsmobile Alero - Engine - 3/18/2014
    What is wrong with my fuel pump?
    I recently had fuel pump replaced now before i crank it it i have to replace the electric fuel pump fuse and jump it off and it runs fine until its turned off . The check engine light is not on and it does sputter a little bit.It has a breatherlyer machine on the ...
     
    • Jimm
      3/18/2014 Jimm
      Has the repair shop measured the fuel system pressure(s) at these points; outlet side of the fuel pump, and at the fuel rail (distribution tube) on the engine? If not, have these steps performed and post a reply with the results.

      Not sure what a 'breatherlyer' machine is exactly - but please post a reply with the results of these two tests for further assistance.
      Jimm
      3/18/2014 AutoMD Member
      What would the fuel pump pressure have to do with the fuse blowing?? Thank You so much Jimm for ur assistance.
    • Jimm
      3/18/2014 Jimm
      Simple - if there is a fuel system restriction, the higher system pressure may cause the fuel pump pressure to maximum output - therefore blow the fuse.

      Since the vehicle was returned to the repair shop - what is their explanation or diagnosis at this point?
      Jimm
      3/18/2014 AutoMD Member
      Its there now I will let u know what they say! Thanks Again!
  • AutoMD Member
    AutoMD Member - 1980 Oldsmobile Delta 88 - Engine - 3/8/2014
    How much voltage should be coming out of the starter side of the ignition switch?
    I have 12 volts to the ignition switch, but only 8 volts out going to the starter circuit. I have 12 volts if I use jumpers with the wiring harness removed. I cleaned the wire lug and tried to spead it out so the spring like function would make a tight connection. ...
     
    • HouseCallAuto
      3/8/2014 HouseCallAuto
      12 volts has to go out to the starter, not 8. I dont hav e a wiring diagram for an '80 Delta 88 but if I reference '82 (probably same) Then the purple wire should have 12 volts out of the switch and the two red wires coming in to the switch naturally should have 12 volts. Check for 12 volts out of the switch on the purple. If you have 12 volts into the switch but only 8 volts out of the switch on the purple then the ignition switch is junk.
  • AutoMD Member
    AutoMD Member - 2002 Oldsmobile Silhouette - Engine - 3/7/2014
    How would I know what spark plug goes to what coil? 2002 Silhouette Oldsmobile 6 cylinder 3.4 engine
    Misfire
     
    • Jimm
      3/7/2014 Jimm
      The spark plug and coil layout is as follows;

      From left to right coils are numbered for cylinders; (5 and 2), (3 and 6), (4 and 1).

      From facing front of the engine (by radiator) to rear the cylinders are numbered;

      Cylinders 1 - 3 - 5

      Cylinders 2 - 4 - 6

      Radiator (front of vehicle)
  • ferliram
    ferliram - 2001 Oldsmobile Alero - Engine - 2/26/2014
    No fuel to the engine,
    fuel pump works, fuel filter new
     
    • yboy82
      8/18/2010 yboy82
      Check the sensor in your fuel tank it may be loose or defective. Also check the condition of your fuel pump relay and other wiring/connection in your fuel system.
      yboy82
      8/18/2010 yboy82
      also check the condition of your fuel pressure regulator
    • ferliram
      2/26/2014 ferliram
      this vehicle has a default that sometimes the security system blocks the fuel to the engine and what you need to do is turn the ignition swtch let it on for a few minutes (10) and then turn it off and on immediatly it never fails
  • AutoMD Member
    AutoMD Member - 1993 Oldsmobile Bravada - Engine - 2/23/2014
    Car has little power and the rpms go up and down before it dies. has new plugs and cap. anyone?
    smells rich. runs rough.
     
    • Jimm
      2/23/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble / Rough Idle:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
 
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