Demolition49 Posted June 23, 2010 Posted June 23, 2010 Im not sure if my clutch is slipping or what but anyway... I noticed a while back on the motorway cruising at 50mph - avg speed zone (cruise controll on in 6th) When it finally came to an end i dipped the clutch and changed in to gear... BUT as soon as i dipped the clutch i heard the revs go up slightly before going back down untill i change then release clutch and everything is normal again... Now every time i change gear if i really take extra care and stare at the revs i can see they go up, more so when im accelerating hard and then dip clutch. (MY FOOT IS COMPLETELY OFF GAS) it goes up slightly before settling back down. What is this? I hope nothing is wrong... ive got 1 year warrantee but i would hate to not have my Z and trust nissan monkeys to fix it Quote
Demolition49 Posted June 23, 2010 Author Posted June 23, 2010 Yeah but i can hear the revs go up and feel them go up in the clutch, it doesnt feel right! Almost every time i dip the clutch the revs climb... i can feel them climb through the clutch, it doesnt feel natural atall! Quote
ZEDEBY Posted June 23, 2010 Posted June 23, 2010 Im not sure if my clutch is slipping or what but anyway... I noticed a while back on the motorway cruising at 50mph - avg speed zone (cruise controll on in 6th) When it finally came to an end i dipped the clutch and changed in to gear... BUT as soon as i dipped the clutch i heard the revs go up slightly before going back down untill i change then release clutch and everything is normal again... Now every time i change gear if i really take extra care and stare at the revs i can see they go up, more so when im accelerating hard and then dip clutch. (MY FOOT IS COMPLETELY OFF GAS) it goes up slightly before settling back down. What is this? I hope nothing is wrong... ive got 1 year warrantee but i would hate to not have my Z and trust nissan monkeys to fix it Check to see if your 350 has the rev up engine, standard through 2005 and some 2006, dependent on first registartion. Quote
Demolition49 Posted June 23, 2010 Author Posted June 23, 2010 Im not sure if my clutch is slipping or what but anyway... I noticed a while back on the motorway cruising at 50mph - avg speed zone (cruise controll on in 6th) When it finally came to an end i dipped the clutch and changed in to gear... BUT as soon as i dipped the clutch i heard the revs go up slightly before going back down untill i change then release clutch and everything is normal again... Now every time i change gear if i really take extra care and stare at the revs i can see they go up, more so when im accelerating hard and then dip clutch. (MY FOOT IS COMPLETELY OFF GAS) it goes up slightly before settling back down. What is this? I hope nothing is wrong... ive got 1 year warrantee but i would hate to not have my Z and trust nissan monkeys to fix it Check to see if your 350 has the rev up engine, standard through 2005 and some 2006, dependent on first registartion. My car is the mid-life Z. It has the rev up its an 06 with facelift bumper, what does this have to do with it revving when dipping clutch Just under 15k miles... Quote
ZEDEBY Posted June 23, 2010 Posted June 23, 2010 Engine management I feel is the issue, not necessarily major though, can be reset/remapped by any grunt who knows what he is doing but don't be afraid of the dealer if you have a warranty. You can always ask for diagnosis only if you think there going to sting you. Give em a whirl!! Quote
ZEDEBY Posted June 23, 2010 Posted June 23, 2010 Thinking again could also just be a sticky throttle, again a job for someone who knows... located in intake plenum I beleive but don't quote - as they say in the airforce root cause - a little bit of poverty. Worth a go, also let them know you know whats what. Quote
Zugara Posted June 23, 2010 Posted June 23, 2010 Mine is the same mate. Never really noticed it till i gave the car a Buzz and noticed it more at the higher rev range. I still get A good bite on the clutch tho. Quote
Demolition49 Posted June 23, 2010 Author Posted June 23, 2010 The dealers like to hold your car forever and the nearest nissan one is quite far from me + i dont like ANYBODY driving my car, they just dont care like i do Ill clean the throttle body myself Then re-set ecu and see if that makes a difference Quote
Chris`I Posted June 23, 2010 Posted June 23, 2010 Sounds pretty normal to me from what I can remember of my 350z. Remember the throttle is drive by wire so even if you get off the throttle, that doesnt mean the ECU will decide to close it Quote
Demolition49 Posted June 23, 2010 Author Posted June 23, 2010 Sounds pretty normal to me from what I can remember of my 350z. Remember the throttle is drive by wire so even if you get off the throttle, that doesnt mean the ECU will decide to close it Can sombody drive thier Z and pay attention to the revs in particular when driving full throttle and then release and clutch down to confirm its not just me... i can hear the engine rev higher and feel it rev through the clutch, just doesnt seem normal to me, maybe a little but mine is quite pronounced when accelerating hard. Quote
BladesGrant Posted June 23, 2010 Posted June 23, 2010 Engine management I feel is the issue, not necessarily major though, can be reset/remapped by any grunt who knows what he is doing but don't be afraid of the dealer if you have a warranty. You can always ask for diagnosis only if you think there going to sting you.Give em a whirl!! Not any grunt can remap the 350z ECU, only 2 companies in the country that can currently remap the ECUs. Quote
andlid Posted June 23, 2010 Posted June 23, 2010 I'll try this for you once I got all brakes fitted :-) When I POP over I could bring my ecu with me and see if bypassing it would sort it! :-) Quote
Demolition49 Posted June 23, 2010 Author Posted June 23, 2010 I'll try this for you once I got all brakes fitted :-) When I POP over I could bring my ecu with me and see if bypassing it would sort it! :-) When you coming over mate? Quote
andlid Posted June 23, 2010 Posted June 23, 2010 When I'm gettin my dingjw auto :-) I'll try this for you once I got all brakes fitted :-) When I POP over I could bring my ecu with me and see if bypassing it would sort it! :-) When you coming over mate? Quote
narcotix Posted June 23, 2010 Posted June 23, 2010 I've had the exact same issue with my Zed since owning it ... I've kind of got used to it now .. but the revs still definitely go up when I dip the clutch to change gear ... There's quite a long thread about this issue: viewtopic.php?t=10781 I don't think anyone has really got the bottom of it though ... Quote
ZEDEBY Posted June 23, 2010 Posted June 23, 2010 Engine management I feel is the issue, not necessarily major though, can be reset/remapped by any grunt who knows what he is doing but don't be afraid of the dealer if you have a warranty. You can always ask for diagnosis only if you think there going to sting you.Give em a whirl!! Not any grunt can remap the 350z ECU, only 2 companies in the country that can currently remap the ECUs. Point taken, I did mean a grunt with the right equipment... You can buy the said unit from the US and alter your management to suit, just plug and play via the OBC port. But the mapping unit though hand held will set you back $500 , dealer has access to this equirpment via diagnostics. Quote
3FIDDYZ Posted June 23, 2010 Posted June 23, 2010 Engine management I feel is the issue, not necessarily major though, can be reset/remapped by any grunt who knows what he is doing but don't be afraid of the dealer if you have a warranty. You can always ask for diagnosis only if you think there going to sting you.Give em a whirl!! Not any grunt can remap the 350z ECU, only 2 companies in the country that can currently remap the ECUs. Point taken, I did mean a grunt with the right equipment... You can buy the said unit from the US and alter your management to suit, just plug and play via the OBC port. But the mapping unit though hand held will set you back $500 , dealer has access to this equirpment via diagnostics. Think you need to do a bit more reading and research If your on about COBB then they dont work on UK cars..... Only proven sucess on UK cars is Osiris Revup and Haltech and they have been mapped by professionals that know the Zeds. Zeds dont really like to be messed with and Nissan did a good job of making it hard to find additional power on a stock car Quote
Demolition49 Posted June 23, 2010 Author Posted June 23, 2010 Done a reset, the problem remains, next thing to do is clean the throttle body, i will do this when i get some free time on wend Quote
3FIDDYZ Posted June 23, 2010 Posted June 23, 2010 Done a reset, the problem remains, next thing to do is clean the throttle body, i will do this when i get some free time on wend Do it carefully.... Just try not to touch the butterfly... there is a guide on youtube I think, (did you do the TB reset too?)... You may want to get it too Abbey so they can hook it up and do a reading, And whilst they are there get them to Revup it!! Quote
andlid Posted June 23, 2010 Posted June 23, 2010 Done a reset, the problem remains, next thing to do is clean the throttle body, i will do this when i get some free time on wend Do it carefully.... Just try not to touch the butterfly... there is a guide on youtube I think, (did you do the TB reset too?)... You may want to get it too Abbey so they can hook it up and do a reading, And whilst they are there get them to Revup it!! Quote
Mark@Abbey m/s Posted June 23, 2010 Posted June 23, 2010 It is a known problem with rev up cars we are working on it. Quote
andlid Posted June 23, 2010 Posted June 23, 2010 It is a known problem with rev up cars we are working on it. Do you know why? Quote
narcotix Posted June 24, 2010 Posted June 24, 2010 My zed isn't the Rev up model and I still get the same issue ... Quote
Ekona Posted June 24, 2010 Posted June 24, 2010 Thinking about this a bit more, it has to be by design. Think of it like a very dodgy way to implement heel and toe changes: When doing one of those, you blip the throttle to match the revs for when you change gear, which helps on wear on both the clutch and the gearbox. Okay, so the car doesn't blip the engine nearly enough for it to be used as that, but I wouldn't bet against it being there for some kind of wear protection. I could be wrong, and it might be emissions based as that's the only two reasons I can think of for a manufacturer deliberately programming something like that in, but I struggle to to work out how it could help emissions. Quote
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