dean_asla Posted May 11, 2022 Share Posted May 11, 2022 Yesterday, on my way home, I noticed that the car was not driving as smoothly as normal, there was a laggy throttle response at lower revs. Did a bit of research on that and was told it could be the fuel pump. Today on my way home, I still had that laggy throttle response but things took a turn for the worse. I was driving along at around 15mph and the engine, TCS and slip light all came on and then car went into limp mode, could only drive about 6mph. I parked up, switched the car off. I had the fault reader (very basic one) in the car, so connected that and turned the car on. The lights were all off and there was no codes. The car then drove with normal power, still with the laggy throttle though. When I open my engine bay, it seems very hot, I know its normally hot after driving but this seems hotter than normal. My car is a 2007 HR I just replaced the radiator and thermostat, they are now Mishimoto, coolant bleeding was done properly and the car does not over heat. The engine is standard, I have an exhaust only. I replaced the spark plugs and panel filter within the last 4000 miles. Would be grateful for any information on what this could be. Quote Link to comment Share on other sites More sharing options...
Sim Posted May 11, 2022 Share Posted May 11, 2022 Random guesses: Have you checked fluid levels on everything? Brake fluid being low can cause odd behaviour. Have you had the oil gallery gaskets done? If I understand correctly, this can lead to the variable valve timing system not working correctly, could that have this effect? Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 11, 2022 Author Share Posted May 11, 2022 14 minutes ago, Sim said: Random guesses: Have you checked fluid levels on everything? Brake fluid being low can cause odd behaviour. Have you had the oil gallery gaskets done? If I understand correctly, this can lead to the variable valve timing system not working correctly, could that have this effect? I checked the fluid, they are all fine. I haven't had the gallery gaskets done since I owned the car. I will have to put it into Nissan for them to look at it. Quote Link to comment Share on other sites More sharing options...
davey_83 Posted May 11, 2022 Share Posted May 11, 2022 Very much worth getting her hooked up to a proper code reader rather than guessing the fault. In the meantime I'd be carrying out a ecu reset for what's its worth. Quote Link to comment Share on other sites More sharing options...
Sim Posted May 12, 2022 Share Posted May 12, 2022 (edited) 23 hours ago, dean_asla said: I checked the fluid, they are all fine. I haven't had the gallery gaskets done since I owned the car. I will have to put it into Nissan for them to look at it. Don't get a Nissan Mainstealer to do it, go to a specialist, I take mine to Abbey Motorsport in Oxted from Leicester. If it's already been done, there should be some paperwork from a previous owner. I just notice you mentioned an exhaust, is that with stock CATs? I'm pretty sure if you've gone with HFCs or test pipes, you're supposed to get a remap as well for it to run right? Edited May 12, 2022 by Sim Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 13, 2022 Author Share Posted May 13, 2022 10 hours ago, Sim said: Don't get a Nissan Mainstealer to do it, go to a specialist, I take mine to Abbey Motorsport in Oxted from Leicester. If it's already been done, there should be some paperwork from a previous owner. I just notice you mentioned an exhaust, is that with stock CATs? I'm pretty sure if you've gone with HFCs or test pipes, you're supposed to get a remap as well for it to run right? I am in Japan, will go to Nissan due to it being near by and there not being an suitable option close to me. When I know what needs done, then I will get it done somewhere else or do it myself if it's not too difficult. The exhaust is a cat back, was on the car when I got it almost 2 years ago. 1 Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 13, 2022 Author Share Posted May 13, 2022 Ok, so this has taken another twist. Yesterday I checked the coolant before driving to work, it was a little low, I topped it up and then drove to work. After work, I checked again, it was slightly low. There is no leak, the oil seems fine and there is no overheating or smoke from the exhaust. Would this suggest my issue is head gasket? Quote Link to comment Share on other sites More sharing options...
Ebized Posted May 13, 2022 Share Posted May 13, 2022 "I just replaced the radiator and thermostat, they are now Mishimoto, coolant bleeding was done properly and the car does not over heat." From years on here, many times issues have cropped up by not following the correct bleeding of the coolant - the heater being often being the 'culprit'. Only offering the thought in case this may be related See here: Quote Link to comment Share on other sites More sharing options...
galaxyg Posted May 15, 2022 Share Posted May 15, 2022 I've got this same set of warning lights with my 350z now, albeit mine does not go into limp mode. Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 16, 2022 Author Share Posted May 16, 2022 On 13/05/2022 at 19:26, Ebized said: "I just replaced the radiator and thermostat, they are now Mishimoto, coolant bleeding was done properly and the car does not over heat." From years on here, many times issues have cropped up by not following the correct bleeding of the coolant - the heater being often being the 'culprit'. Only offering the thought in case this may be related See here: Seems to be so many different instructions on what to follow, this is very detailed, thanks for that. Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 16, 2022 Author Share Posted May 16, 2022 I went to Nissan, they told me the issue with the lagging throttle is the throttle body. I drove the car yesterday, after bleeding the system again and it seemed to drive ok. I will give it a couple of days and see how it goes. Quote Link to comment Share on other sites More sharing options...
davey_83 Posted May 17, 2022 Share Posted May 17, 2022 (edited) Nice one fella, let us informed. Hopefully they stated which side throttle body as there's two. Edited May 17, 2022 by davey_83 Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 18, 2022 Author Share Posted May 18, 2022 On 17/05/2022 at 19:20, davey_83 said: Nice one fella, let us informed. Hopefully they stated which side throttle body as there's two. Yeah they did, was the driver side. Coolant is no longer going down, seems that issue must have just been the car was not bleed properly. Car still lagging a little, will now look at options for the throttle body. Do you know if there is an alternative to the OEM or is it best just to go with the very expensive OEM Quote Link to comment Share on other sites More sharing options...
davey_83 Posted May 19, 2022 Share Posted May 19, 2022 (edited) I would try an ecu, throttle and pedal position reset first if not already done so *warm engine. https://www.350z-uk.com/topic/53148-how-to-ecu-accelerator-pedal-throttle-valve-resets/ Edited May 19, 2022 by davey_83 Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted May 19, 2022 Share Posted May 19, 2022 Fully working OEM preowned throttle bodies are in stock for 350Z HR at a fraction of dealer price. Just drop me a PM if I can help further. 1 Quote Link to comment Share on other sites More sharing options...
dean_asla Posted May 20, 2022 Author Share Posted May 20, 2022 18 hours ago, davey_83 said: I would try an ecu, throttle and pedal position reset first if not already done so *warm engine. https://www.350z-uk.com/topic/53148-how-to-ecu-accelerator-pedal-throttle-valve-resets/ Thanks for that, will give it a go. This should be done when the engine is warm? Quote Link to comment Share on other sites More sharing options...
davey_83 Posted May 20, 2022 Share Posted May 20, 2022 Yes pal 1 Quote Link to comment Share on other sites More sharing options...
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