Jimmy1101 Posted January 8, 2020 Share Posted January 8, 2020 Hey guys, Iv had my 1998 nissan skyline for about 2 months now and iv been trying to figure out why its running so rich Im getting 200ks A TANK!!!!. It blows black smoke and smells like fuel Iv changed the o2 sensor, spark plugs, maf sensor When the car is off and the engine is warm the car stuggles to turn back on... it turns on but then i have to tap the accelerator to keep it on When im driving and coming to a stop i clutch in and slow down and the rpms drop below 1000 and sometimes even stalls When im speeding up and boost starts to build the car starts stuttering sounds like antilag tbh and i loose power I dont know what it can be and would appreciate any help Thank you Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/ Share on other sites More sharing options...
GTSBoy Posted January 8, 2020 Share Posted January 8, 2020 Boost/vacuum leak. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922519 Share on other sites More sharing options...
blind_elk Posted January 8, 2020 Share Posted January 8, 2020 What about dirty injectors? How would a big dose of injector cleaner go? Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922524 Share on other sites More sharing options...
GTSBoy Posted January 8, 2020 Share Posted January 8, 2020 Nah, running filthy rich and not wanting to idle suggest a big fat hole somewhere. Dirty injectors usually lead to lean pops and only a moderate increase in fuel consumption. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922525 Share on other sites More sharing options...
in71ce Posted January 8, 2020 Share Posted January 8, 2020 I had the same problem with my GTR and found it was the fuel pump control module in the boot was starting to die Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922532 Share on other sites More sharing options...
BK Posted January 8, 2020 Share Posted January 8, 2020 6 minutes ago, in71ce said: I had the same problem with my GTR and found it was the fuel pump control module in the boot was starting to die Um, how would the fuel pump control module make a car run rich ? All the GTR pump module does is put 6v, 9v or 12v to pump via dropping resistors within the unit, controlling how hard the pump runs. It could cause a lean condition, not a rich, as pump is not supplying enough fuel at load. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922534 Share on other sites More sharing options...
in71ce Posted January 8, 2020 Share Posted January 8, 2020 7 minutes ago, BK said: Um, how would the fuel pump control module make a car run rich ? All the GTR pump module does is put 6v, 9v or 12v to pump via dropping resistors within the unit, controlling how hard the pump runs. It could cause a lean condition, not a rich, as pump is not supplying enough fuel at load. Im just stating what i have experienced Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922535 Share on other sites More sharing options...
BK Posted January 8, 2020 Share Posted January 8, 2020 And how did you find that out ? If module fails and pump runs flat out at 12v, injectors still deliver the same fuel as programmed. Like wiring a pump to run flat out all of the time, which a lot of people do, won't make any difference to injected fuel to make it run richer. If the module fails so it makes the pump run not at 100% at say 9v, at WOT, then the car will lean out under load. That's like saying a failing pump can make a car run richer. At no time can the fuel pump control module fail in any way to all of a sudden make the car run rich. For OP I'm leaning towards a big vacuum leak too as @GTSBoy stated above. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922536 Share on other sites More sharing options...
Jimmy1101 Posted January 9, 2020 Author Share Posted January 9, 2020 21 hours ago, GTSBoy said: Nah, running filthy rich and not wanting to idle suggest a big fat hole somewhere. Dirty injectors usually lead to lean pops and only a moderate increase in fuel consumption. Will pull the injectors out to get them cleaned and i couldnt find any vacuum leaks anywhere Car idles fine just doesnt when the car is warm and iv clutched in while driving ....only last a couple seconds then will either stall or bounce back up and steady itself.. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922585 Share on other sites More sharing options...
GTSBoy Posted January 9, 2020 Share Posted January 9, 2020 Have you pressure tested the inlet from the turbo to the TB? Boost leak is not always going to show up as a vacuum leak. And, for idle control, how sure are you that the IACV is working properly? Cleaned it lately? Your symptoms (rolling stall) are typical of a sticky IACV. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922586 Share on other sites More sharing options...
Ben C34 Posted January 9, 2020 Share Posted January 9, 2020 my vote is boost leak, and yo umust pressure test. thats a rule. you cant see them. second vote is for coolant temp sensor. both votes hold equal weight and if i am correct you owe me a favor. talk later. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922589 Share on other sites More sharing options...
Ben C34 Posted January 9, 2020 Share Posted January 9, 2020 also no way never ever ever is it the injectors or fuel pump causing those symptoms. Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922590 Share on other sites More sharing options...
niZmO_Man Posted January 9, 2020 Share Posted January 9, 2020 When the standard ceramic turbine wheel shattered off the turbo in my R32 GTS-t, the car ran like shit and used a lot of fuel Link to comment https://www.sau.com.au/forums/topic/479531-help-my-r34-gtt-is-running-super-rich/#findComment-7922620 Share on other sites More sharing options...
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