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1997 Nissan Altima Misfire Diagnosis

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  • #526410
    EricTheCarGuy 1EricTheCarGuy
    Keymaster

      This video was actually shot last fall. I’m just now getting around to posting it. I hope it provides some insight into my diagnostic process and is able to help you if you run into a similar situation.

    Viewing 15 replies - 1 through 15 (of 29 total)
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    • #526421
      Michele PensottiMichele Pensotti
      Participant

        Very interesting video Eric!

        It made me think about experience and diagnostics, and I thought that sometimes past experiences can be misleading to say the least.
        You had some past experiences with nissan’s injectors gone bad and this biased you against the fuel injection system, even if there were lots of elements pointing in the intake leak direction.

        A lot of us techies DO learn from experiences, and if there’s something that this experience you had with this nissan it has to be “don’t throw parts at problems!”, as you always say.

        One thing is to just say it, and one other is to bump on it ๐Ÿ˜‰

        Sometimes even errors are good to be shown, so I think you did a good service to all of us viewers.
        Thank you!

        The KISS rule as you had already explained in the blower motor video, is a GOLDEN one.

        Live long and prosper my friend (and stay dirty!) ๐Ÿ™‚

        10nico

        #526455
        jeep72jeep72
        Participant

          You can use propane to check the leak too.

          #526462
          Bill LonglandBill Longland
          Participant

            Great video Eric. I am wondering if the customer paid for the parts in the tune up you did? They didn’t seem to be needed after all. If they did pay for them how did you explain it to them so they would? Just asking because sometimes I’m in that spot doing repairs like that for people from my house.

            #526524
            EricTheCarGuy 1EricTheCarGuy
            Keymaster

              [quote=”10nico” post=61794]Very interesting video Eric!

              It made me think about experience and diagnostics, and I thought that sometimes past experiences can be misleading to say the least.
              You had some past experiences with nissan’s injectors gone bad and this biased you against the fuel injection system, even if there were lots of elements pointing in the intake leak direction.

              A lot of us techies DO learn from experiences, and if there’s something that this experience you had with this nissan it has to be “don’t throw parts at problems!”, as you always say.

              One thing is to just say it, and one other is to bump on it ๐Ÿ˜‰

              Sometimes even errors are good to be shown, so I think you did a good service to all of us viewers.
              Thank you!

              The KISS rule as you had already explained in the blower motor video, is a GOLDEN one.

              Live long and prosper my friend (and stay dirty!) ๐Ÿ™‚

              10nico[/quote]

              Thank you very much for those comments. I agree, I think it’s good to post my ‘mistakes’. That way you the viewer doesn’t have to make the same ones. Also, it takes me off the pedestal that people sometimes put me on. I’m human just like the next guy, far from perfect, but with a little time and effort I’m able to overcome. That is the philosophy of ‘staying dirty’ after all.

              #526529
              EricTheCarGuy 1EricTheCarGuy
              Keymaster

                [quote=”trucker101″ post=61822]Great video Eric. I am wondering if the customer paid for the parts in the tune up you did? They didn’t seem to be needed after all. If they did pay for them how did you explain it to them so they would? Just asking because sometimes I’m in that spot doing repairs like that for people from my house.[/quote]

                A fair question. The customer paid for the parts. He’s a good friend of mine, I’ve been working on his stuff for years. That said, I called him up, told him what I knew of the situation and gave him my recommendations. I didn’t get the parts until after I talked with him and he had OKed the repair. After I found the intake gasket leak I called him up and admitted my mistake. He was cool and wasn’t really set back all that much in the end.

                Honestly, he got a great deal on this one. That intake gasket is a PITA as you’ll see in next weeks video. It was a quick cut on camera but it took me about 6 hours in the end. It had some very difficult to access fasteners. I’m not worried though. What I do benefits you the viewer, and thats’ what’s most important to me.

                #526531
                EricTheCarGuy 1EricTheCarGuy
                Keymaster

                  [quote=”jeep72″ post=61815]You can use propane to check the leak too.[/quote]

                  Yes you can.

                  #526564
                  college mancollege man
                  Moderator

                    Excellent video. Nice diagnostic work. ๐Ÿ™‚

                    #526687
                    HugoHugo
                    Participant

                      Eric i have a 2002 Maxima which has a rough/misfire type feel. I have no codes. I have taken it to the dealer and their initial look did not come up with anything other than it’s possible that my connectors to the ignition coil (since they are brittle and old) could be loose and causing an issue at the idle. Under normal driving conditions and at highway speeds all is ok. If I put it in neutral/park it does not do the stumble. I have replaced all of the plugs, cleaned out the throttle body, replaced all of the coils, cleaned out the MAF, and checked for vacuum leaks. I’m replacing the connects soon, but was wonder if you have any other advice.
                      thanks in advance.

                      #526692
                      RichardRichard
                      Participant

                        Thanks for the video.
                        I have a VW Passat 1999 B5 1.6 that has a similar issue, so I’m going to try some of this stuff to track it down.
                        It also only misfires when idle or low rpm, and is worse if I don’t drive the car for a day or 2.
                        One thing I have noticed is when it does misfire I hear a tick noise from the distributor, as if it’s maybe arcing in there. The distributor is annoying to get to though.
                        I did also have arcing on 2 of the leads at the spark plug end. Is it possible something is not grounding properly causing all 3 of these problems?

                        #526693
                        Bill LonglandBill Longland
                        Participant

                          [quote=”EricTheCarGuy” post=61854][quote=”trucker101″ post=61822]Great video Eric. I am wondering if the customer paid for the parts in the tune up you did? They didn’t seem to be needed after all. If they did pay for them how did you explain it to them so they would? Just asking because sometimes I’m in that spot doing repairs like that for people from my house.[/quote]

                          A fair question. The customer paid for the parts. He’s a good friend of mine, I’ve been working on his stuff for years. That said, I called him up, told him what I knew of the situation and gave him my recommendations. I didn’t get the parts until after I talked with him and he had OKed the repair. After I found the intake gasket leak I called him up and admitted my mistake. He was cool and wasn’t really set back all that much in the end.

                          Honestly, he got a great deal on this one. That intake gasket is a PITA as you’ll see in next weeks video. It was a quick cut on camera but it took me about 6 hours in the end. It had some very difficult to access fasteners. I’m not worried though. What I do benefits you the viewer, and thats’ what’s most important to me.[/quote]Ahh,I didn’t know you had called him before getting the parts,makes sense now, Thanks for the reply and yes I’m dirty!! LOL banana:

                          #526757
                          NissanMaxxNissanMaxx
                          Participant

                            Intake Gasket is actually a VERY common problem with the older Altimas. It’s the first thing I check when I work on an Altima with a similar issue.

                            #526759
                            Michele PensottiMichele Pensotti
                            Participant

                              Hey Eric, I forgot to ask about the alternator, did you do something for that ugly noise it made?

                              At least some lube to make that poor thing live a little longer (and quieter)? ๐Ÿ˜‰

                              Thank you and good evening (or day? here it’s 20.30) :blink:

                              Live long and prosper (and stay dirty!)

                              10nico

                              #527054
                              ytramytram
                              Participant

                                2 thumbs up on video!!!! I appreciate the human factor associated with your video on the mistake. I took more away from that then any cut version that would not have shown that. Thanks.

                                #527349
                                EricTheCarGuy 1EricTheCarGuy
                                Keymaster

                                  [quote=”10nico” post=61977]Hey Eric, I forgot to ask about the alternator, did you do something for that ugly noise it made?

                                  At least some lube to make that poor thing live a little longer (and quieter)? ๐Ÿ˜‰

                                  Thank you and good evening (or day? here it’s 20.30) :blink:

                                  Live long and prosper (and stay dirty!)

                                  10nico[/quote]

                                  I did try a little oil on the bearing and it didn’t do anything. The owner is a car salesman so he looks to save wherever he can. He also wants me to do a timing chain on that engine. I hope I hear back from him on that, I’d love to shoot THAT video.

                                  #527370
                                  Michele PensottiMichele Pensotti
                                  Participant

                                    And I’d love to see that timing chain job on video! :woohoo:

                                    By the way, would it interest you an alternator-refurbish-video or something on that road?

                                    When I had my old beloved AX GT I spent a morning at the local dealer; I had a stuck front caliper and I offered him a trade: since I wasn’t going to be able to pay for the new caliper, I asked him for the use of his shop’s tools and the time to fix the caliper.

                                    It took me all the morning and a lot of penetrating oil and vice-work, but in the end the caliper was saved and fixed.
                                    While I was doing my little job I dreamt of working there, and spoke with another guy in the shop, who was taking apart a BX alternator which had it’s bearing gone.
                                    I remember he showed me the shaft and it was so worn that it was half the diameter!!! :blink:

                                    Now that I have a BX too I sometimes wonder…how will my alternator’s shaft and bearing be??

                                    Well, since they must be going for 24 years I thought a good alternator strip out and rebuild could be beneficial! ๐Ÿ˜‰

                                    Oh, by the way, keep up the good work Eric, you’re my idol, not because you’re perfect (as indeed you are not!) but JUST not perfect!
                                    So human , so like all of us, so kind to show your weakness and always so gentle. ๐Ÿ™‚

                                    What can you want more?? :cheer:

                                    Thumbs up Eric!

                                    Live long and prosper (and stay dirty!)

                                    10nico

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