Hi guys and girls .

well ive only owned my car a few days and ive started to get problems already they started yesterday when pulling off in my car it seems to have a big flat spot almost as if it over fuels for a split second and the car doesnt seem to pull as well as it should seems to get to about 4000 revs and hold back then goes again then holds back on and off i checked the plugs and there pretty black so getting some new 1s ( i no this wont help them being like that) also when i rev the car it splutters at at abot 1000 revs then pulls its like the car is reving really slow .. does anything im saying make any sense? lol

hi mate,has this prob just happened after normal driving.? have you put bad fuel in?

no mate it happens all the time

i noticed it after i got the car , it was very very slight nearly unoticable but now its worse, since yesterday it been all the time now wether the car is hot or cold

welcome to my world lol, ive been having this for 4 years on and off now, seems to be my idle valve that causes bad running on mine, try cleaning the connectors on it, also chack all other electrical connectors for green corrosion

i noticed it after i got the car , it was very very slight nearly unoticable but now its worse, since yesterday it been all the time now wether the car is hot or cold

 

What year is your Zed?

Auto or manual?

 

Try cleaning all electric connections, from fuel pump to rad, (has the ptu been changed to a series 2?) had a similar issue when i bought my Zed. After taking some advice from this site, i cleaned every single elec connection (inc coil packs) with contact cleaner and a fine wire brush. Been working fine ever since.

 

Hope this helps you mate.

 

Pete

ah yeah sorry guys ment to put the spec up but my heads spinning wondering what it could be , its a 93 TT Auto, ive cleaned some of the connectors but its too dark now and to be honest i dont know where half of them are or what they are theres so many lol , if it was a 200sx i could do it with my eyes closed lol

 

think i'll try your trick tomorrow pedroZ, cheers for that mate , and thanks also Stella

ive tried searching for a link to tell you where the sensors are but no luck anyone no ?

it also started to cough and splutter when i started it this morning and this afternoon the revs was bouncing around under the 1000rpm mark , its almost like its flooding it self when starting :(

There's a pic in the FAQ section pinpointing the locations of all the sensors.

 

Ivan

There's a pic in the FAQ section pinpointing the locations of all the sensors.

 

Ivan

ah ok,thanks :)

could you post up the link for it , i cant find the pic for it in the FAQ section ?

first sensor i would clean is the yellow one on the water elbow at the front of the engine ,there is 2 sensors on it unplug the yellow one and clean out all the green cr@p in it ,use a deep plug socket and remove the sensor intself from the water elbow and give the bottom of it a clean aswell , unplug battery for a couple of hours to reset ecu and fingers crossed , i was having an eratic idle on mine and it started to overfuel and it was the ecu water temperature sensor that was at fault on mine

hope this helps mate

cheers Tommy,

i'll give that 1 a try tomorrow, ive cleaned the top but only spray contact cleaner in it but this time i'll use a small wire brush on it to , i'll clean the bottom aswell,

Did it make yours miss further up the rev range too ?

cheers Tommy,

i'll give that 1 a try tomorrow, ive cleaned the top but only spray contact cleaner in it but this time i'll use a small wire brush on it to , i'll clean the bottom aswell,

Did it make yours miss further up the rev range too ?

use wonder wheels to clean...works wonders!

not sure it just ran very lumpy and was constantly trying to catch revs

i used a small piece of sand paper to get right into the connectors ,using a bit of your girls emery board works well as well

if that doesnt work i would do the same with the ptu, coilpack connectors and injectors ,its a bit of a process of elimination i,m afraid

clean coolant temp sesnor first then see if anything happens

Check the yellow connector to the rear of the passengers side of the plenium, water temp is located on the top metal pipe in the centre of the cam covers, also have a look at the MAF under the panel in front of the rad, get a small file set, ideal for cleaning the connectors and a can of ambersol (electrical contact cleaning spray), check that you are getting spark to all coilpacks, and clean em too.

Basically any connection u can clean, clean it. Check they are all seated correctly, as just one slightly off and it will mess things up.

thanks all , i'll clean every connection i can find and willlet you no what happens ,

Thanks again

right i been out to the car and started it, sat inside to try and keep warm putthe fan heater on 1st setting and was watching the temp gauge which was on the white line because car was cold but then after about a minute and half the gauge just shot up to the halfway mark but the air coming out the heaters was still stone cold, so i left it to idle , the temp gauge never moved when the air was warm the gauge was still in same spot and stayed there til i turned the car off about 20mins later , never overheated or anything , like eveyone said water temp sensor faulty or could it relate to something else ?

the sensor next to the yellow one is the temp gauge sensor that might be a bit dodgy try cleaning that one as well (the yellow one is the ecu temp sensor )

http://www.300zx.co.uk/forums/showthread.php?t=26120

bloody sensors everywhere lol soon as mrs comes home she can take over the baby sitting and i can work on the car , cheers guys

http://www.300zx.co.uk/forums/showthread.php?t=26120

thanks retro thats a great help mate :bow:

right guys an update!!

 

i just found a little blue resistor stuct in the det sensor plug, so obv been bypassed, do u think this might be blown and thats causing me the problems?

also found a wire to the back passenger side injector shafted soon as i touch it car sound like it runs on 5cylinders and smells rich