Hey guys I have had this prob for a while basicly I drive the Z around for 5 min let her warm up then when shes at normal temp I like to give it a bit lol. Any ways for the first 15/20 min of driving runs really good goes hard. After that 20 min of driving she gets slow and slugish any ways I put mu boost gauge in the other day and I noticed that in that first 20 min of driving she goes to 9PSI. After that she runs about 6 PSI if you top it out about nearly 7PSI. Basicly why is this ?? Boost leak ?? I just fitted a FMIC but this problem has been around befrore then. Any ideas ?? Thanks for any help guys
mmmm well this sounds like a good example of the ecu doing its job... to me sounds like your det sensor is sensing detonation and then switches into safe mode as well as safety boost hence why its seeming slugish etc... have checked your base timing? you need to completly go over your zed. have a look in the tech section and do maintenance steps. spark plugs etc... it might even be a connection where if it gets disconnected it will chuck the ecu into safe mode ... have u put it on conzult both before this happens and after ??? check to see error codes etc...
thanks chad umm I got a new det sensor put in and adelaide Z cars remounted it on the passinger side somewere so have they made an error ?? I thought saftey boost was 5 PSI is my boost gauge out ?? Thanks agin
no safety boost is 7psi where did they remount the det sensor. alot of people have problems with this when it is relocated. the reason is that there may be more vibration in that area triggering the det sensor to go off. it may possibly not even be detonation....
well if you go over ur zed , and check everything and is all sweet. next step would probably be chuck it on a dyno to double check its not detonating (you'd have to bypass the det sensor for this)... and then if all sweet then i will say that its the location of the det sensor. too much vibration in that area causing it to trigger....
no boost leaks have nothing to do with the electrical side of things.... but going over your zed you should do a boost leak test anyway...your hitting stock 9psi so sounds ok, but still do a boost leak test and go over ur zed anyway.... wat happens is your ecu is running in normal mode. your boost is hitting 9psi which is stock. so everything runs good. then when the det sensor feels vibration it triggers the ecu and the ecu will jump into safety maps. this will also trigger the boost solenoids to be restricted to 7psi aswelll....
npz like i said ud have to go over the zed and make sure its not detonating. maybe a dyno run to help with this. and if its not detonating then it should be the vibration the det sensor is registering...
cool well I rang them and im booked in for friday so we will see whats going on. ie error codes and a possible dyno run ect. Thanks man
possibly not going into safety boost might be a small boost leak which is opening up as the car gets hotter then contracts when the car cools down again.... i had similar boost leak to what i described on one of the intercooler hoses when i 1st got my zed.....
i was thinking that but honeslty I dunno lol I wil have to get a boost leak test done when she is hot.
good find boys... Hey Mike yeah it looks like your car is fine on cold start and then the heat kicks in which is triggring your new det sensor... I know i can trust Adelaide Z cars.. but Relocation of the sensor is opening a can of worms in my view.. Sure nearly all of the other cars from them have behaved fine with the relocation but its not recomended. Otherwise.. nissan would have put it on the side anyway. They decided to rear mount the DET so that it would pick up pistons 5 and 6 (at the back due to firing order 1-6). Having it on the side wont sense the leanest part of the motor.. again pistons 5 and 6 rear left and right banks. Get your car setup to bypass the DET following the tech article and hit the dyno for a rolling run (not power run) just to see (as Chad as already pointed out.) It takes about 15min and under a dollar in materials. (wire, 1 megaohm resistor and solder) Mate your car is close to 100% maintained / serviced so it wont give u problems at 9 psi even with your DET bypassed. You should be able to gun it on stock boost and not need the safety buffer of the det. Lastly.... I would also try re connecting the old DET.. Ive found that some ppl assume its the wiring going down to the DET thats broken (ie cant fix it / new det / engine out).. but in some cases its the wireing going to the computer so try that too. Good luck with that.
Quick test for you. to see if you are actually running in safety boost mode, just try disconnecting your safety boost solenoid connectors on either side of your engine and take it for a quick drive "when running hot" and see if it still cuts it back down to 7psi. If it runs fine, then it is prob the det sensor triggering the safety boost solenoids. If it still cuts back to 7psi with the solenoids disconnected - then it's more likely a plumbing (leak) problem.
ok so say i do that umm if i were to floor it wouldnt it run like infinity boost or just up to 9PSI ?? Also If i connect up my EBC which requires me to dissconnect them would that get rid of this problem thus I wouldnet need the det sensor ?? Also my ebc solenoid makes a constent cliking sound which can be heard when the engine is off and the sound speeds up the more you turn the dile. Thats normal yeh ?? Thanks guys
Thanks so much no I havent plummed it yet just conected it in every way eletricaly untill I can make sure the engine is safe from detonation then I will plumb it up to the turboes atm its sitting in the fuse box lol. Thanks benny C you have helped me out once agine
