HI ALL YOU Z LOVERS SOMEONE PLEASE HELP me my beloved z has been stood around for 18 months in this time it has been started a few times with no probs at all, 2 days ago i started it up and it took 3 attempts to start at first engin turned ovr second atempt fired up then stalld third atemp fired up but was running rough, first thing i thoght it was due to being stood for so long and may be no pety, i drove to pety pump which is just up the road car was still running rough and idling was rough as well kept acting as tho it was going to stall! filled up £15 quid unleaded and was taking it to a garage for mot all the way it was the same rough running and just had no power at all wouldnt respond to full throtl also revs strugled to go over 3500 rpm also noticed that car was smoking quite a bit white smoke as i got to garage i left i waited in car the revs were realy low 400 - 500 rpm,when trying to rev it was rough and coughing out black smogy smoke and smelt a lot of fuel as well from it, basicly it was getting worst when reving it there was flat spots it wouldnt respond properly there was a few pops from the exhust.revs go up fall down when trying to rev again instantly it with black smoke and smell of fuel from exhusts, i left it parked at the garage the next day i went back to do a manual diagnostic it showd code 13 and 42 fuel temp sensor and engine coolant temp sensor code 42 has been there since iv had the car thats 4 years code 13 im not sure when that appeared, when i tried started the car it wouldnt fire up at all just kept turning over i was tryin for 30 min with no luck.

i towed car home since then i have checkd for fuel and sprk at plugs that all seems to be fine afm seems to be working as its registering air on apexi unit also i took all plugs out and coils cleaned them properly with wire brush and damp start, i also have sprayed electronic contact cleaner on all plugs visable to me on ptu and cas plugs as well, i put every thing back together tried starting the car and no luck but was tring to start but just nokd off again. can any one help me please and sory this is long.

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excuse me mate i emailed you straight back requesting your address as i didnt have one and as my ebay account got hacked i cant access it as ebay are investigating you will have notice that with a not saying user no longer registered on ebay!!! so if you aint got my emails requesting your address that is not my problem!! you can forward your address to me and ill be more that happy to send them as they are no use to me sat here also this insulting comment you have left on here better be removed by 2night other wise i will make a complaint bout you to this site owners as ebay is not related to this site and b4 getting your facts right you left an insulting comment.

 

 

i can help you as i have had the same trouble BUT you still havent sent me that clock that i bought from you on ebay a month ago and you have been ignoring my emails. Give me some indication that you are going to send it and prove you are not a crook and either myself or someone else can help you.

ATTENTION!!!! DO NOT REPLY TO THIS POST AS THIS GUY IS A POSSIBLE RIP OFF MERCHANT!!!!!

Cool it mate, just dont want to be scammed. I have emailed your msn email with my address to send the clocks to. Reply to that so i know you have got it and send the clocks of and i will post again on this thread to say that everything is cool.

I had the exact problem as you are having with your car so can help you out but need to know you are playing ball first.

Spent Another 1 Hour With My Beloved Z Done Another Diagnostic And Comes Up With Codes 13 Coolant Sensor 21 Ignition 42 Fuel Sensor And Also I Took The Plugs Out Again And They Were Wet Obvious With Me Trying To Start It, They Cam Out Wet Smelt Like Fuel But Black In Colour I Dried The Plugs And Checked For A Spark But I Didnt Get Any?? But When I Take The Cam Sensor Plug Off Theres A Click Sound And When I Connect It It Clicks Again! Any Suggestions???

 

Is There Anyone In Lancashire With A Z Who Can Help Me With Swapping Parts Round To Check Faults? Dont See Many About Round Here!! Any Help Would Be Appreciated

:rofl: :rofl: :rofl: :rofl: :rofl:

start simple, get to the root of your spark probs first, then have a look at the injection timing, fault finding is a bit of a pig, but sometimes it can be something simple and job done, if your getting a load of black smoke out the back, then i reckon your getting crap combustion, injectors, fuel timing, air etc..... not sure about the vvt on these cars, i pressume its electronic and cannot be altered manually, i dunno to be honest, i havent had a zed long and am still learning my self, but i am a marine engineer and black smoke nearly always means fuel problems.

Sounds like she is not running on all 6. With engine running, pull connecter of each coil pack 1 by 1 to to discover which cylinders are running or not. Once you find the faulty cylinders, its a case of checking connectors are on properly for Coilpack and Injector, and checking for corrosion. You can also swap around coilpacks to rule out there failure. If you cant find fault in the connectors then remove a coilpack and plug and test for spark individually.

 

Code 13 - Coolant temp sensor will cause car to run overly rich. Give the sender connector a wiggle, and clean the contacts if corroded.

 

Might also be worth checking the big blue connector is firmly plugged into the ECU, in the passenger footwell....as this would cause similar symptons (or if car has been stood up a while its not unheard of for mice to make themselves a home with the ECU and chew on some wires)

hi mate if the engine would turn over i would try and check coil packs it just wont fire up at mo just turns over, i checked for spark on plugs and seems as thu theres no sparks at all iv checked 2 coil packs and both had nothing iv cleaned and wiggled all connectors from ptu to cas, i know the cas is working as when i disconnect the wire the fuel pump and few relays click off and when you connect it back up all kicks in again. im getting cods 13,21,42 coolant , ingnition sytem and fuel temp sensor, iv checked ecu plug its all fine.

 

 

Sounds like she is not running on all 6. With engine running, pull connecter of each coil pack 1 by 1 to to discover which cylinders are running or not. Once you find the faulty cylinders, its a case of checking connectors are on properly for Coilpack and Injector, and checking for corrosion. You can also swap around coilpacks to rule out there failure. If you cant find fault in the connectors then remove a coilpack and plug and test for spark individually.

 

Code 13 - Coolant temp sensor will cause car to run overly rich. Give the sender connector a wiggle, and clean the contacts if corroded.

 

Might also be worth checking the big blue connector is firmly plugged into the ECU, in the passenger footwell....as this would cause similar symptons (or if car has been stood up a while its not unheard of for mice to make themselves a home with the ECU and chew on some wires)

hey everyone just been told that the fuel i put in car (which was when i almost ran out of juice) had abit of diesel in it a mix of 85 unleaded and 15 diesel thta wouldt cause the blacksmoke and starting probs would it? im not getting a spark as well now with code 21 showing sumat to do with ignition! any sugestions?

Someone Helpppppp!! Tryed Working Ptu And No Luck Iv Got Rid Off All Codes Except 42 Fuel Temp Sensor Changed It But Still Not Gone Away!! But Codes 13, 21 Have Gone After Changing Parts, But Still No Spark At Plugs!! Can Any One Help As This Is Right P***ing Me Off Now, Iv Checked All Coils For Spark But Nothing On Any Plug/coil! What Else Can It Be? The Cas Seems To Be Working As It Clicks Fuel Pump And Other Stuff On And Off When You Plug Unplug! So What Else Can It Be??? Any Suggestions Will Be Help Appreciated

http://www.300zx.co.uk/forums/showthread.php?t=90934

 

Looks like this thread may help if your having Spark problems

THAK MATE BUT IV ALREADY CHECKED THAT THREAD BUT NO LUCK.

 

http://www.300zx.co.uk/forums/showthread.php?t=90934

 

Looks like this thread may help if your having Spark problems

THE ecu will need resetting as it hold codes for 50 engine starts IIRC. Disconnect the battery for 1/2 hour or so :)

 

Vijay

hi mate the batterys been disconnected for 3 days now i fitted ptu coolant sensor and fuel temp sensor then i connected the battery up, there simply is no spark at plugs, cheers

 

THE ecu will need resetting as it hold codes for 50 engine starts IIRC. Disconnect the battery for 1/2 hour or so :)

 

Vijay

then I would double check the ECU connection and CAS next

if you still dont have spark & its not the ptu then try changing your main ecu as that could possibly be faulty as well, also the fuel pump control unit/ & even though you mention that the cas is ok have you actually removed it & checked by rotating it to check whether you can hear the injecters clicking ?? if you can then the cas is ok

iv checked ecu connection and seems fine, also if the cas was faulty then that means the injectors wouldnt register yeh? well i hav apexi avcr and the injectors seem to be working acording to that as when i try fireing the car up the injectors show they doing something! if the cas was faulty then that wouldnt happen would it?

 

then I would double check the ECU connection and CAS next

hi no i havent taken it out to check that way but i have a apexi avcr which registers activity in the injectors when i fire it up! so i dont think its the cas

 

if you still dont have spark & its not the ptu then try changing your main ecu as that could possibly be faulty as well, also the fuel pump control unit/ & even though you mention that the cas is ok have you actually removed it & checked by rotating it to check whether you can hear the injecters clicking ?? if you can then the cas is ok

just tried taking cas off but no luck i took 3 bolts off but the cas was realy stuck on hard and i didnt wana force it, but im sure the cas is working.

iv checked ecu connections and all fine, but still the bitch wont fire up im realy p****d off now can any one help me further any suggestions? what iv done so far:

 

changed ptu

cleaned all ptu plugs and connections

cleaned cas plug

cleaned air flow meter plug

afm and injectors are registering on the apexi units so i think cas is working fine,

changed coolant temp sensor

changed fuel temp sensor but code still showing (42) its been like that from day 1 so that aint the problem.

iv changed ign coil relay

checked all connections on coil packs

checked fuel pump

 

all above r fine only the fuel temp sensor. the problem is that i dont even have a little spark on any plugs or coils iv checked all.

 

any help or suggestions will be appreciated tnx guys

also does anyone have or know where i can get hold off info on the ecu plug wires? i wana track the fuel temp wire down as may be broken somewhere.tnx

also does anyone have or know where i can get hold off info on the ecu plug wires? i wana track the fuel temp wire down as may be broken somewhere.tnx

 

Fuel temp sensor is only used for warm starting I think and certainly wouldn't give you this problem.

I drove around for months until I found a garage had disconnected mine.

 

You keep saying you're sure the CAS is OK but you haven't actually tested it by the sound of things and it's one of the only possible causes.

Faulty ECU is very rare and they are the only items in the chain:

ECU --> CAS --> PTU --> Plugs

ECU --> CAS --> Injectors

hi chris well yeh fuel temp sesor defo aint causing this prob as its been there since i bought the car, but i have been told that this can cause the car to be in safe mode so that means safety boost!!! dont know if thats true, and i keep saying i dont think its cas cause when i unplug and plug it in the fuel pump turns on and off also other things not sure what and as i have the apexi avcr i connected one off the wires so it gives me injector readings and when i try to fire the car uo theres activity in the injectors and if the cas was faulty wouldnt all these things not work as well? well ptu is out of question as iv changed it! tnx neway

 

Fuel temp sensor is only used for warm starting I think and certainly wouldn't give you this problem.

I drove around for months until I found a garage had disconnected mine.

 

You keep saying you're sure the CAS is OK but you haven't actually tested it by the sound of things and it's one of the only possible causes.

Faulty ECU is very rare and they are the only items in the chain:

ECU --> CAS --> PTU --> Plugs

ECU --> CAS --> Injectors

The CAS often fails and still activates the pump but the rotation doesn't switch the injectors so it could well be the CAS.

No spark = PTU or CAS and you've changed the PTU ;)

You HAVE to take the CAS off and rotate the spindle and see if you can hear the injectors click.

Could be ECU but they're reliable so highly unlikely and if the ECU dies the fan is permanently on and you couldn't do the diags.

 

Fuel temp sensor won't put it in safety mode, only the knock sensor does that. Also before water is up to temp or the water sensor is disconnected.

 

I've not wired in an AVCR but I presume it connects to the ECU wiring so just because it is seeing a signal doesn't mean the other parts of the system are...

hi well i tried to take the cas off y-day but i just could not take it off, i took the three bolts off and i thout it would just pull out but mine was stuck solid only managed to pull it out 3 mm then i gave up as i didnt wana damage it. so whats best way to take it off mate? tnx

 

The CAS often fails and still activates the pump but the rotation doesn't switch the injectors so it could well be the CAS.

No spark = PTU or CAS and you've changed the PTU ;)

You HAVE to take the CAS off and rotate the spindle and see if you can hear the injectors click.

Could be ECU but they're reliable so highly unlikely and if the ECU dies the fan is permanently on and you couldn't do the diags.

 

Fuel temp sensor won't put it in safety mode, only the knock sensor does that. Also before water is up to temp or the water sensor is disconnected.

 

I've not wired in an AVCR but I presume it connects to the ECU wiring so just because it is seeing a signal doesn't mean the other parts of the system are...