HELP MAF PROBLEM CAR DOESNT HOLD IDLE

[Datsun_love28]

INFO: hi I am new too this website and I just got my first car it is a 1993 z32 n/a and I've been wanting this car since I was 11 and started too get into imports.


PROBLEM:well for starters I bought my car with no idle and a died battery so it would start up and die straight out then I read my check engine light and it said my throttle position sensor (tps) and Mass air flow sensor I replaced both parts idk whats wrong with the tps but as soon as I unplug my MAF sensor the car starts up and idles at 2100 rpms and then you put it into gear it wont pass 2600rpms and I don't know if me driving it or even turning it on is bad for the engine and my car is running very rich. oh yeah before I start it up and it makes a noise as if something is struggling to push a liquid like a buzzing sound then it stops and if I don't wait sometimes the car wont start up.

[emiliog2276]

INFO: hi I am new too this website and I just got my first car it is a 1993 z32 n/a and I've been wanting this car since I was 11 and started too get into imports.


PROBLEM:well for starters I bought my car with no idle and a died battery so it would start up and die straight out then I read my check engine light and it said my throttle position sensor (tps) and Mass air flow sensor I replaced both parts idk whats wrong with the tps but as soon as I unplug my MAF sensor the car starts up and idles at 2100 rpms and then you put it into gear it wont pass 2600rpms and I don't know if me driving it or even turning it on is bad for the engine and my car is running very rich. oh yeah before I start it up and it makes a noise as if something is struggling to push a liquid like a buzzing sound then it stops and if I don't wait sometimes the car wont start up.

Have you checked both parts with a multimeter?

http://z32.wikispaces.com/Throttle+Position+Sensor

http://twinturbo.net/nissan/300zx/forum ... oblem.html

It wont pass 2600 rpms because the computer is not getting a reading from the MAF since its unplugged so the its in "safe mode"

Play with your idle screw so it wont die as soon as you turn it on.

http://s95014253.onlinehome.us/63104/157335.html

The wd-40 parts is quite helpful

Check for vacuum leaks.

na-modified-vaccum-hose-diagram-t551531.html

Buzzing sound? Is it coming from the fuel tank? Fuel pump?

[Datsun_love28]

i tested my tps before and it didn't read at all and I would think that if I turned the tps the throttle shaft would move along but no and I tried moving the senor and have a buddy put the multi meter on and it didn't work and I went on conceptz and the have the connector for like 15 bucks but like im not trying to do a lot of electrical stuff to the car rather do that in a shop

[ThisIsSparTTa]

I'd test continuity between the connectors and the back of the ECU if you're already replaced parts. You have a 21 year old car full of brittle old rubber and plastic connectors, you're going to need to get used to doing some light electrical work, or your car could be spending a lot of time at the shop.

Going on ebay and getting a $30 Consult to USB adapter, and using it with a free program like ECUTalk also helps with this as it not only allows you to pull codes, but gives you all of the sensor readings, which makes it really easy to see what the ECU is reading.

Also, add 93 N/A to your car description in your profile so we know in the future.

[Ace2cool]

I'd test continuity between the connectors and the back of the ECU if you're already replaced parts. You have a 21 year old car full of brittle old rubber and plastic connectors, you're going to need to get used to doing some light electrical work, or your car could be spending a lot of time at the shop.

My thoughts exactly. There's a reason the car is calling out those parts. Are you sure you used an N62 MAF?