Car wont rev over 2500RPM

Need_NewName · 01-05-2015, 07:38 PM

Having issues with Z, wont rev over 2500RPM, like if it was in Limp mode.
service engine light flashes but no codes are thrown, weird...
Sometimes I get a code P0102 , MAF related, i've which MAF sensor on either sides.. same Issue..

Any suggestions.

90 ST · 01-05-2015, 09:02 PM

Try turning the car off for a bit and then back on, give it a half hour or so, see what happens...mine did something similar way back. I turned it off for a bit and back on after about 30 mins and it was ok to get home, but at the dealership the next morning it turns out the ECU was gone.

P's_Z · 01-05-2015, 09:11 PM

Had this issue, took it to the dealer and they cleaned throttle bodies, 4 months without any issues. Heres the thread i made in case you want to read it

Z does not accelerate

SouthArk370Z · 01-05-2015, 11:49 PM

I'd try cleaning the MAFs first. Since you are able to swap MAFs, you only need a can of spray MAF cleaner. If that doesn't work, I'd try P's_Z's clean-the-TBs (not an easy DIY but not that difficult if you have some mechanical aptitude). If you live someplace that doesn't get too cold, you can delete the TB warm-up lines while you're in there.

90 ST · 01-06-2015, 12:01 AM

The other thing I've had a problem with was the prefilter on the fuel pump it's self, had to pull the pump and clean it, been good since...

How many miles on the car?

I've got over 200k and have never had a dirty TB cause a problem...mine don't seem to get dirty. lol

Need_NewName · 01-06-2015, 02:55 AM

75k

Need_NewName · 01-06-2015, 11:31 PM

updated, old battery wasn't holding the charge, clean MAF and Tb, new batt still same issue,
will continue tomm, tearing it down...

SouthArk370Z · 01-07-2015, 02:07 AM

Before you start tearing it down, I'd read the appropriate sections of the FSM. The diagnostic procedures are written for use with Nissan's CONSULT but you can use them to figure out what needs to be checked. If your OBD tool can read PIDs, that will be a big help troubleshooting.

90 ST · 01-07-2015, 03:03 AM

75k shouldn't be filter unless you buy cheap gas..

Is it still doing it?

01-05-2015, 07:38 PM	#1 (permalink)
Need_NewName Base Member Join Date: Feb 2014 Location: usa Posts: 58 Drives: 09/370z Rep Power: 11	Car wont rev over 2500RPM Having issues with Z, wont rev over 2500RPM, like if it was in Limp mode. service engine light flashes but no codes are thrown, weird... Sometimes I get a code P0102 , MAF related, i've which MAF sensor on either sides.. same Issue.. Any suggestions.

01-05-2015, 09:11 PM	#3 (permalink)
P's_Z A True Z Fanatic Join Date: Apr 2013 Location: PR Posts: 1,530 Drives: Zeta Rep Power: 469	Had this issue, took it to the dealer and they cleaned throttle bodies, 4 months without any issues. Heres the thread i made in case you want to read it Z does not accelerate __________________ Zeta Last edited by P's_Z; 01-05-2015 at 09:13 PM.

01-05-2015, 11:49 PM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	I'd try cleaning the MAFs first. Since you are able to swap MAFs, you only need a can of spray MAF cleaner. If that doesn't work, I'd try P's_Z's clean-the-TBs (not an easy DIY but not that difficult if you have some mechanical aptitude). If you live someplace that doesn't get too cold, you can delete the TB warm-up lines while you're in there. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

01-07-2015, 02:07 AM	#8 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Before you start tearing it down, I'd read the appropriate sections of the FSM. The diagnostic procedures are written for use with Nissan's CONSULT but you can use them to figure out what needs to be checked. If your OBD tool can read PIDs, that will be a big help troubleshooting. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

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01-05-2015, 09:02 PM	#2 (permalink)
90 ST A True Z Fanatic Join Date: May 2010 Location: Calgary Posts: 1,861 Drives: 90 and 15 GMC Sierra Rep Power: 421	Try turning the car off for a bit and then back on, give it a half hour or so, see what happens...mine did something similar way back. I turned it off for a bit and back on after about 30 mins and it was ok to get home, but at the dealership the next morning it turns out the ECU was gone.

01-06-2015, 12:01 AM	#5 (permalink)
90 ST A True Z Fanatic Join Date: May 2010 Location: Calgary Posts: 1,861 Drives: 90 and 15 GMC Sierra Rep Power: 421	The other thing I've had a problem with was the prefilter on the fuel pump it's self, had to pull the pump and clean it, been good since... How many miles on the car? I've got over 200k and have never had a dirty TB cause a problem...mine don't seem to get dirty. lol

01-06-2015, 02:55 AM	#6 (permalink)
Need_NewName Base Member Join Date: Feb 2014 Location: usa Posts: 58 Drives: 09/370z Rep Power: 11	75k

01-06-2015, 11:31 PM	#7 (permalink)
Need_NewName Base Member Join Date: Feb 2014 Location: usa Posts: 58 Drives: 09/370z Rep Power: 11	updated, old battery wasn't holding the charge, clean MAF and Tb, new batt still same issue, will continue tomm, tearing it down...

01-07-2015, 03:03 AM	#9 (permalink)
90 ST A True Z Fanatic Join Date: May 2010 Location: Calgary Posts: 1,861 Drives: 90 and 15 GMC Sierra Rep Power: 421	75k shouldn't be filter unless you buy cheap gas.. Is it still doing it?