Gun_Strife Posted September 2, 2009 Share Posted September 2, 2009 Ok I have a 77 280z and she fires up pretty good (idles a bit low) but after a short time maybe 5 minutes and giving it some throttle she starts to putt out and will die. It starts to sound like it loses a cylinder and even giving it throttle starts to have no effect. So what happens is the spark plugs are getting wet. I pull them out and are covered in dark liquid thinking oil or bad fuel. After I take them out and clean them and they are dry. I can put them back in and she fires up again. She does spit out a little bit of black smoke also possibly running rich? I am thinking to change fuel pressure regulator and check the injectors. Let me know what you guys think, am I on the right track, way off, or close but you have something else you think I should check. Any and all thoughts will be appreciated. Thanks guys. Quote Link to comment Share on other sites More sharing options...
stravi757 Posted September 2, 2009 Share Posted September 2, 2009 well you need to know what kind of liquid it is. is it oil or gas? if its oil, then you probably have a blown head gasket, if its fuel then you have unburned fuel. you could try and change you plugs wires and cap. and recheck all of you connections. or maybe you injectors are stuck open or too high of fuel pressure. try doing a compression test, i just bought a comp tester for like $25, its cheap and can tell you alot about your motor. Quote Link to comment Share on other sites More sharing options...
Gun_Strife Posted September 2, 2009 Author Share Posted September 2, 2009 Ok I will try and grab a tester today but the engine was rebuilt in 04 driven for a year (or so the story goes) and than it sat till I picked it up just a bit ago. I will also see if I can determine what liquid it is and maybe a pic. Thanks Quote Link to comment Share on other sites More sharing options...
datsun79z Posted September 3, 2009 Share Posted September 3, 2009 Gun Strife; You did not mention which engine you have in the car. Carb. of F.I. If the engine you have is fuel injected, read on. One of the first items to pay attention too is the cylinder head temperature sensor. It is located on the passenger side of the engine. It will be mounted in the head or the block depending what year it is. Is it connected? Get your factory service manual out and perform the checks recommended for the sensor and wiring harness. There is a good chance your problem lies in this area. As soaked and contaminated as the plugs have become, you have little chance of getting the engine started much less idling well. You will have to install a fresh set of plugs. Keep us posted on your progress. Regards; Mike Quote Link to comment Share on other sites More sharing options...
stravi757 Posted September 3, 2009 Share Posted September 3, 2009 Gun Strife; You did not mention which engine you have in the car. Carb. of F.I. If the engine you have is fuel injected, read on. One of the first items to pay attention too is the cylinder head temperature sensor. It is located on the passenger side of the engine. It will be mounted in the head or the block depending what year it is. Is it connected? Get your factory service manual out and perform the checks recommended for the sensor and wiring harness. There is a good chance your problem lies in this area. As soaked and contaminated as the plugs have become, you have little chance of getting the engine started much less idling well. You will have to install a fresh set of plugs. Keep us posted on your progress. Regards; Mike I believe the sensor your talking about is located under the thermostat housing next to the water temp sender and thermo time switch on a 77 280z. Quote Link to comment Share on other sites More sharing options...
Gun_Strife Posted September 3, 2009 Author Share Posted September 3, 2009 Ok thanks. It is a 77 5 speed fuel injected 280z (sorry for leaving that out) I will check out that sensor. Plugs are good and she will start up once the plugs are cleaned off but only for a few minutes cause the plugs get wet again Quote Link to comment Share on other sites More sharing options...
richkcmo Posted September 13, 2009 Share Posted September 13, 2009 Pls keep us posted on this. It would really help. thanks Quote Link to comment Share on other sites More sharing options...
Gun_Strife Posted September 15, 2009 Author Share Posted September 15, 2009 I plan to I have just been busy with another car that I am trying to get ready by this week Quote Link to comment Share on other sites More sharing options...
Gun_Strife Posted October 30, 2009 Author Share Posted October 30, 2009 Wow been too long but I finally had a chance to play with it. I started with the injectors and turns out they are pretty bad 4 or 5 of them were stuck open and all were cracking. Hopefully this is the only problem. I picked up another fuel rail that I was just going to swap but they are not exactly the same the one i picked up is missing a piece which I think is the part that goes to the sensor. So I need help with taking the injectors of that rail and putting them on mine, what is the easiest way to get the injectors off? Quote Link to comment Share on other sites More sharing options...
chipo280z Posted October 30, 2009 Share Posted October 30, 2009 Wow been too long but I finally had a chance to play with it. I started with the injectors and turns out they are pretty bad 4 or 5 of them were stuck open and all were cracking. Hopefully this is the only problem. I picked up another fuel rail that I was just going to swap but they are not exactly the same the one i picked up is missing a piece which I think is the part that goes to the sensor. So I need help with taking the injectors of that rail and putting them on mine, what is the easiest way to get the injectors off? the easiest for me was to remove the whole fuel rail with the injectors on... Quote Link to comment Share on other sites More sharing options...
Gun_Strife Posted October 30, 2009 Author Share Posted October 30, 2009 well I have the fuel rail off I need to remove the injectos from the fuel rail to move to a different one. I don't want to cut them because the fuel hose seems to be attached to the injector, so I need to remove the injector from the fuel rail with the hose. Quote Link to comment Share on other sites More sharing options...
chipo280z Posted October 30, 2009 Share Posted October 30, 2009 grab them and move them side to side until you can pull them out... you can cut tu ring that holds the fuel injector hose and put a new one without the ring Quote Link to comment Share on other sites More sharing options...
Gun_Strife Posted October 30, 2009 Author Share Posted October 30, 2009 you wouldnt happen to have a pic of the part you are talking about. I will try and twist them off first though but dont want to mess up the hose unless it is really easy to cut and install new one. Quote Link to comment Share on other sites More sharing options...
chipo280z Posted October 30, 2009 Share Posted October 30, 2009 It is easy it just takes some patience. Just cut the ring with some pliers and remove. The ring is the one holding the hose to the injector. When you put new hoses just put new fuel hose clamps (the ones that are made for fuel lines without the little squares on them). Quote Link to comment Share on other sites More sharing options...
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