Temperature Gauge Flicker

[ShiftyTys]

Hey Guys,

Has any one seen this before? http://youtu.be/3gHCvWREjIM

It has only started a couple weeks ago.

I was fiddling with coils as one was suspect (turns out it was gone - splitfire too annoyingly - bought a replacement splitfire and all is now well)

Perhaps I bumped something while replacing the the coil?

Is it likely to be a gauge fault?

Everything runs fine otherwise, the UPPER limit of the flicker is always my accurate temp. So in the vid the temp is normal, and the car has warmed up.

Any advice guys? Thanks in advance.

- Tys

[89CAL]

Does the flicker happen with engine revs or something along those lines or is it flickering in that video without you touching anything (sorry no sound here)

I think you'd have more serious problems then the temp gauge if you left the earth at the back of the coilpack brackets off but it might be a common earth.

Check the earth's near the water temp sensors too. Should be bolted to the intake manifold near the sensors

[ShiftyTys]

Thanks for the Reply.

This is on idle. It doesn't fluctuate while driving either.

As far as I know I put everything back exactly as I took it off during my swapping of coils to diagnose. Seemed pretty simple.

Unplug loom, remove bolts, take out bracket things holding 3, *fiddle*, REVERSE prior method to put back on.

I don't recall taking off or see an earth near the back of the coilpack - however i wasn't looking for one.

I would perhaps have thought it not to be a temp sensor as that would mess with my tune too right? I know when my engine is cold the boost is limited and a few other things for safety (tried merging into traffic on a cold engine to nearly faceplant the dashboard many a time). Surely while giving it a bit of boost, while the sensor is reporting "hotcoldhotcoldhotcold" would cause it hiccup and cut and do all sorts of funny things?

[blind_elk]

2 different sensors. The gauge uses the single-pin sensor. Have you tried replacing it? I'm pretty certain it's electrical - no way the coolant can change temp that rapidly.

Could be a fractured wire on / near the sensor.

[ShiftyTys]

2 different sensors. The gauge uses the single-pin sensor. Have you tried replacing it? I'm pretty certain it's electrical - no way the coolant can change temp that rapidly.

Could be a fractured wire on / near the sensor.

Ah understood.

Agreed, not possible to fluctuate that fast. So where is the sensor located for the gauge? - forgive my ignorance.

THanks!

[89CAL]

They are both next to each other on the front of the intake manifold. It's been a while since I've had a standard manifold but should be around the radiator hose fitting on the manifold anyway.

There are 2 earths that I think are for these near the sensors as well.

The earth lug on the back of the coil pack loom is pretty important (Mainly for your coilpacks) so maybe just double check its there and connected. Unless they are different on the series 2 engines?

I'll have a look at my wiring diagram in a minute for you

[ShiftyTys]

They are both next to each other on the front of the intake manifold. It's been a while since I've had a standard manifold but should be around the radiator hose fitting on the manifold anyway.

There are 2 earths that I think are for these near the sensors as well.

The earth lug on the back of the coil pack loom is pretty important (Mainly for your coilpacks) so maybe just double check its there and connected. Unless they are different on the series 2 engines?

I'll have a look at my wiring diagram in a minute for you

Thanks heaps for the assist.

Ill have a check under there tonight.

Although funnily enough the trip to work this morning has has no flicker... this is after it constantly doing it the last fortnight. *sigh*

Ill still check though.

[89CAL]

It'll be a minor wiring issue or an earth issue if it's intermittent I would say

[ShiftyTys]

Yeah That's my thought. As it is back again.,

You haven't seen a gauge go before? Or begin to show signs of going by flickering?

Couldn't check last night as it was raining heavily.