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Gtir Motorsport club » General Discusion » Gtir related Discussion » Need Expert Advise for Start up issues

Need Expert Advise for Start up issues

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51 Re: Need Expert Advise for Start up issues on 26th April 2017, 5:16 pm

Lew_GTiR


@joetheeskimo wrote:Potenitally fixed it....kind of.

Previously when the engine would idle the wideband o2 guage would read around 15 (amber indicator on gauge), thus running rich.

Now ive potentially fixed it after 20 seconds of starting it now reads around 13.5 which is good i beleive as the gauge shows it as green rather than amber.

The connector i had plugged into the water temp sensor was a white connector, i believe it should have been the red connector. The red connector was previouslly fitted to the sensor fitted directly under throttle bodies to the IACV (i think).

I have fitted a resistor to the temperature sensor loom connector and measured it at the ECU connecotr  (when disconnected from the ECU) and it reads the correct value. However when plugged into the temperarure sensor it does not read any value. THis leads me to believe the sensor is faulty as it reads open circuit thus needs replacing.

However this should hopefully be the all the wiring issues sorted. except the oil gauges not working.

That's interesting, it sounds like you have isolated everything up to the sensor.

Have you checked resistance across the temp sensor when the engine is both cold and warm?

Can you back probe the sensor and check voltage across it?

52 Re: Need Expert Advise for Start up issues on 26th April 2017, 5:39 pm

Mr B

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gtir technician
gtir technician
So does the fan stay off when fake the water signal to ecu ?
Do you get the 5v supply voltage at water sensor plug when disconnected ?
I would pull sensor out and check resistance readings and replace if OC or out of spec, do buy a good quality one preferably genuine though .
If sensor checks out ok then check the plug as faulty/damaged plug could give OC reading .

53 Re: Need Expert Advise for Start up issues on 26th April 2017, 6:09 pm

joetheeskimo

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@Mr B wrote:So does the fan stay off when fake the water signal to ecu ?
Do you get the 5v supply voltage at water sensor plug when disconnected ?
I would pull sensor out and check resistance readings and replace if OC or out of spec, do buy a good quality one preferably genuine though .
If sensor checks out ok then check the plug as faulty/damaged plug could give OC reading .

With sensor disconnect at ecu connector with loom connected it reads 5V.

Took the sensor and it measured open circuit so the sensor does need replacing. Also checked continuity between sensor connector and ecu connector and reads correctly

I will call Nissan tomorrow and get a genuine one on order.

54 Re: Need Expert Advise for Start up issues on 26th April 2017, 6:32 pm

mike74

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You can also get them from import car parts (probably faster than nissan)

55 Re: Need Expert Advise for Start up issues on 26th April 2017, 6:34 pm

Mr B

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gtir technician
gtir technician
^
Job Jobbed
ICP do a ecu water sender but no idea what manufacturer and some of their lines is china junk . oem is best if not silly wait/money .

56 Re: Need Expert Advise for Start up issues on 26th April 2017, 6:41 pm

Lew_GTiR


Glad it's sorted!

57 Re: Need Expert Advise for Start up issues on 26th April 2017, 6:46 pm

johnny gtir

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moderator
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If there silly money or a long wait surly someone will have a good working one to sell

58 Re: Need Expert Advise for Start up issues on 26th April 2017, 7:37 pm

nomad

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59 Re: Need Expert Advise for Start up issues on 26th April 2017, 8:01 pm

Mr B

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gtir technician
gtir technician
but what make is it ! values on the R ecu water sensor not that common and most don't match them . I stick to oem on that one when can .

60 Re: Need Expert Advise for Start up issues on 26th April 2017, 8:12 pm

nomad

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61 Re: Need Expert Advise for Start up issues on 26th April 2017, 8:13 pm

nomad

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Is that it .... different colour though ????


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62 Re: Need Expert Advise for Start up issues on 26th April 2017, 9:58 pm

Mr B

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gtir technician
gtir technician
^ is right P/N . either 22630-51E00 or 22630-51E02

63 Re: Need Expert Advise for Start up issues on 27th April 2017, 7:42 am

joetheeskimo

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I had bought the one from ICP before but it doesn't fit.
Bought this one.
http://www.ebay.co.uk/itm/132062533451?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Going to call Nissan today to see what lead time there is on a genuine one. Also going to call a couple of car shops to see I can get one quicker.

64 Re: Need Expert Advise for Start up issues on 27th April 2017, 7:53 am

mike74

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65 Re: Need Expert Advise for Start up issues on 27th April 2017, 10:25 am

Mr B

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gtir technician
gtir technician
If you don't buy genuine always bench test temp values of pattern sensor to fsm chart as some are way off as the nissan sensor is not matched that easily in pattern sensors.

66 Re: Need Expert Advise for Start up issues on 27th April 2017, 10:57 am

joetheeskimo

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I called the garage and they can get one For this afternoon. I will test it against jug of hot water with a thermocouple and measure every 10degreees to match the FSM. Don't happen to have a copy of what the values should be do you?

67 Re: Need Expert Advise for Start up issues on 27th April 2017, 12:53 pm

Mr B

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gtir technician
gtir technician
^
just measure at 3 points
20degC - 2.1 to 2.9kOhm
50degC - 0.68 to 1.0kOhm
80degC - 0.30 t0 0.33kOhm

If not in the resistance range Get another brand sensor or go oem .

Many of the euro make pattern sensors are wank or simply not good cross match spec .

68 Re: Need Expert Advise for Start up issues on 27th April 2017, 6:42 pm

joetheeskimo

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@Mr B wrote:^
just measure at 3 points
20degC - 2.1 to 2.9kOhm
50degC - 0.68 to 1.0kOhm
80degC - 0.30 t0 0.33kOhm

If not in the resistance range Get another brand sensor or go oem .

Many of the euro make pattern sensors are wank or simply not good cross match spec .

Measured it

20degC - 2.2 kOhm
50degC - 0.8kOhm
80degC - 0.30kOhm

Also fitted it and the car now starts without an issue. Problem solved. Always ensure correct loom connector is fitted to the correct sensor.

Other issue now is that the AFR reading is around 14.9 on idle which is rich.

WHen driving at slow speeds it really judders bad, my first thought is following;

- Boost leak / vacuum leak
- dodgy AFM reading
- Dodgy or incorrect IACV reading
- Ignition timing incorrect.

Hopefully these are things bob can check relativly easily when its on the dyno.

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