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smj999smj

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  • Kawaiifu ·
    Hi I have a 91 nissan sentra classic 4 door with a ga16de engine. My car would start fine and drive around for about 20 min and then all of a sudden it won't accelerate past 2500 RPM. Knowing its the MAF I switched it out for a friends OEM MAF and drove it around for a bit and all seemed well until it did it again. The car would jerk and bog down till it stalls , I have to wait about an hour till it cools and starts back up again and the whole process repeats itself. It's throwing code 12 (Air flow meter) but I know its working well. Is the TPS and throttle body part of the air flow meter code? Could it be wiring? It only does this when the engine gets to operating temperature. When I looked at the distributor I found oil and black residue in the cap and the rubber gasket was pretty much gone. I also changed fuel filter and pump. I did a whole engine tune up but idk whats the problem. Please help me. I just want to be able to drive this car :(
    smj999smj ·
    There are a number of things that can cause this. Often it's the small pipe from the intake manifold that gets clogged up with carbon. A sticking EGR control valve solenoid can also stick and cause this. My recommendation would be to obtain a download or copy of the Nissan factory service manual for your vehicle and follow the diagnostic steps for DTC P0402.
    smj999smj ·
    The Jonko site was taken down years ago and I don't know much more than that. It's a shame because it was a pretty good site for information and had some knowledgeable people there.
    md80 ·
    Hi Smj999smj
    I've been wondering what happened to the guys from Jonko. How have you been??
    md80
    smj999smj ·
    The input shaft of the transmission slides into the end of the crankshaft when it's assembled. The pilot bushing sits in the end of the crankshaft. A small puller is used to remove it and the new one is carefully tapped in. Do not put any grease on the inside of the pilot bushing unless the manufacturer of the clutch specifies otherwise.
    lupeperez ·
    2000 Nissan sentra 1.8l 4 cy I just bought clutch kit and it came with a pilot bushing and disassembled old clutch and could not find where it goes or if it even requires one
    smj999smj ·
    I'm assuming you are referring to the drain plug on the engine block and not the petcock on the lower radiator tank. To be honest, I don't believe I ever removed the block drain on a VG engine. If you are replacing the water pump, I wouldn't bother because most of the remaining coolant in the block (after you drain the radiator) will drain out when you remove the water pump (just make sure you put a drain bucket below it before you take it off). If you are dead set on removing the block drain, look along the sides of the block near the freeze out plugs; if it has one, it'll be in that area.
    1Wrench ·
    Greetings smj999smj,

    In the real world my name is Bob Triggs. I am new here. I have been reading many of your replies to tech questions here. I have to say that your offerings here have been very helpful to me in learning more about my engine and vehicle.I have a 1995 Hardbody VG30E 4x4 truck. I am in the process of doing timing belt, h20 pump, shaft seals, thermostat etc. A heavy duty tuneup. It has just over 200K miles on it.

    One thing I am having trouble locating is the engine coolant plug. I hope you don't mind me asking you. Sincerely, 1Wrench (Bob Triggs)
    bellember ·
    Hi smj999smj - can you please take a look at my reply in this post: Steering Linkages End Boots/Bushings and let me know what you think?
    smj999smj ·
    (continued) If that's okay, then the ground wire circuit will need to be checked for continuity between the injector and ECU for an open circuit, excessive resistance within the circuit or a short. If that's okay, the ECU grounds should all be checked. If those are good, it is likely the ECU is defective.
    smj999smj ·
    Reprogramming doesn't fix a bad ECU. Reprogramming is performed when the manufacturer (in this case Nissan) has issued an updated software program to fix a particular issue. Usually it's a matter of changing the values or range limits for engine sensors (ie O2 sensors). Also, ECU's don't "burn fuel." They make calculations on sensor inputs and then drivers in the ECU create a timed pulse for the ground wire from the fuel injectors. What I would do is get a "noid light" for Bosch style fuel injectors to see if the injectors are "firing." The light simply plugs into the fuel injector harness connector and will "flash" while the engine is cranking if the injector is being "fired." If it doesn't flash, the next step would be to use a 12v test light and make sure there is power at the fuel injector harness connector.
    NYAUDHI ·
    we got another ecu that was now sending the right signal to the coil packs, but this ecu wasnt burning fuel, so ignition kicks but does not start. but i was told the exact same thing by a friend, that ecu,s failing are very uncommon. what what ill do is have the ecu diagnosed and see whether it can be remapped or reprogrammed!! ill keep you posted on
    smj999smj ·
    Sounds like you have a bad coil pack; does it have individual coils (aka "coil-on-plug")? What is the stored code? Nissan ECU's obviously can fail, but it's pretty uncommon.
    NYAUDHI ·
    thanks so much, im in kenya n i cant say that we have really good techs here. with my ecu the car actually starts but its not sending a signal to one of the spark plugs, its sluggish and the MIL is on. so i was told i MUST get another one. some say a diagnostic tool can reset this, some say get another ecu.
    smj999smj ·
    I'm in the USA, so I can't speak for the ECU's in your country. We didn't get the B15 until the year 2000. The 99 B14 had the GA16DE and the ECU would just plug and play, if it was the correct one. In 2000, when our B15 arrived, it had the QG18DE or the SR20DE. These cars had immobilizer systems and programmable ECU's. The needed the key initialized to the ECU using a CONSULT II or later scantool or the vehicle would not start. On the plus side, you could replace the program on the ECU with the correct one for that vehicle (let's say you bought a used one), but you still needed a CONSULT II or later scantool and access to Nissan's ASIST terminal to download the ECU software program.
    NYAUDHI ·
    the ecu has many serial numbers that we do not know which ones to match or if we have to match all of them. my engine being a qg15de, if i find another 1999 sunny b15, will its ecu work on mine? and is it plug n play? thank you?
    NYAUDHI ·
    hallo,
    hope im not a bother. i have a 1999 sunny b15. im having computer box/ ecu difficulties. are these components interchangeable between other b15 cars or do i need a specific one for my car.
    thanks
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