Question about Nissan 200SX
I have an Australian made 1998 Nissan 200sx when driving the car in any gear at a certain rev between 2-2.5 rpms there is a dead spot and coughs when holding throttle at that revs. It still idles and has plenty of revs other than that. When I first start the car with tbu on it does not miss. Any help would be much appreciated.
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Posted on Jan 02, 2017
Check your intake and exhaust modules. I have a 1987 D21 and had the same problem (if I understand your post). I replaced the modules located behind the driver side headlights and it fixed the problem. Good luck! I hope this helps.
Posted on Nov 14, 2008
have you checked your air inlet manifold for any leakages by spraying WD40 around each portall bolted to the cylinderhead gasket,check for vacuum air pipes deterioration.make sure the engine is running first ,then spray WD40 to check that the engine speed should increase.it sounds like your engine is haveing problems breathing due to heavy hydro carbons increasing./and your CO2% is dropping.
Posted on Jan 27, 2009
what you need to check is are you getting any spark at the spark plugs, to do this, unplug one of your spark plug wires at the spark plug, find a screwdriver that will fit inside the spark plug wire housing, make sure your screwdriver has a insulated or non conductive handle, hold the steel shank of the screwdriver about 1/8"-1/4" from your exhaust manifold and have someone crank the engine, just for a second or two, look to see if there is spark jumping from the screwdriver shank to the manifold, if there is, then you eclectically is probably OK.
second you need to check your fuel, you really should have a fuel pressure gage but for now lets just do a preliminary check.
find your fuel line going to the intake manifold (steel tubing 5/16"-3/8" diameter) you need to disconnect the line somewhere between the fuel pump and the intake manifold. you'll need a can.
hold the can under the fuel line so fuel doesn't go everywhere, then have someone crank the engine, if it is an electric fuel pump you wont need any help, all you'll need to do is turn the key on and it should start pumping fuel, the fuel discharge should be very noticeable, it will really start coming out fast and furious.
If you don't have fuel coming from the line or very little, your fuel pump or fuel filter is probably bad.
alot of vehicles will stop running on just a plugged up fuel filter, but normally it will give you some warning, like your engine will start to miss or loss of power on hill or accelerations. If you haven't experienced any problems until now, i doubt its the filter.
see if you can check those two items out and let me know what you find
buy the way, alot of the newer vehicles on the road today use special connection clips to connect fuel lines, you may need a tool to get the line disconnected, there little plastic tools in different sizes depending on the size of your fuel line. if you need one and your doing this yourself, borrow one or at the automotive house ask for a fuel line quick disconnect tool. i don't think there alot of money. make sure your car isn't out of gas.
good luck and let me know how you make out.
would appreciate your feedback, please
Posted on May 23, 2009
Idle air control valves short out all the time on these models. You can ohm the motor to check it, but the down side to a shorted iac valve is that it shorts out the ecm if not repaired quickly. when the valve shorts, 12 volts is supplied directly to the ecm and burns the circuit board. The other option is the air flow meter, this is also a very common problem but typically a p0171/p0174 would be stored in self diag.
Posted on Jun 22, 2009
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