Temp Guage EJ22 to Brumby.

lovey80 · Post by **lovey80** » Sun Jul 08, 2012 10:20 pm

Ok tomorrow appart from doing some tappit covers for a mate with a calais the next little problem to sort out is my temp guage in the little Brumby.

Since changing the fuel injection rail the Brumby seems to be running beautiful. Although I am hoping my fuel guage is acting up as the few short runs up a back road near home seems to have used a large amount of fuel.

The engine running smoothly makes me think that the temp sensor is fine and I just need to fault find to the guage.

Any tips from, others that have gone through this proces on a conversion?

GOD · Post by **GOD** » Sun Jul 08, 2012 11:29 pm

I'm confused. Are you talking about the fuel gauge or the temp gauge?

Fuel gauge is unchanged in most conversions. If you're concerned about fuel consumption, first step is to measure it properly.

An old temp gauge won't read properly with an EJ sensor - you need to get an EA temp sensor into the EJ engine.

Dane.

lovey80 · Post by **lovey80** » Mon Jul 09, 2012 1:04 am

I'm talking about the temp guage. I am assuming the temp sensor that is buried down under the intake manifold sends info to the ECU and the guage. If I find a EA sensor and replace it won't I then have running problems?

GOD · Post by **GOD** » Mon Jul 09, 2012 8:30 am

There are currently two coolant temp sensors buried under your manifold. The larger one with a reddish plastic plug is for the ECU. The little brass one with a single wire (usually white with green trace) is the EJ gauge sender, which you don't need.

The EA gauge sender won't go into any existing holes in the EJ engine, so to make your original gauge work, you need to do something like this:

Dane.

steptoe · Post by **steptoe** » Mon Jul 09, 2012 8:48 am

That looks like a brass adapter in the pic - should be easy enough to source.

OOps, wrong alrady...Closer look says it is whole boss welded to that cross over section !!

Makes sense to retain Brumbys gauge sender in EJ donk esp if the resistance values between two models are different - which is likely

I got same fuel consumption fright by gauge indications when I first went to twin carbs, the fuel gauge changed its spots and dropped marginally over a short period, or maybe I was knocking over some distance a little quicker than I should ( I do recal haulling up some long inclines at a um.... acceptable new shove) All was good with figures in the end. Gauges are crude.... they are not trip computers getting calcs from ECU injctor times and numbers

GOD · Post by **GOD** » Mon Jul 09, 2012 9:21 am

steptoe wrote:Closer look says it is whole boss welded to that cross over section !!

Yep. EJ sensor goes in that little hole on the right in the pic. EA is the much larger sensor added on the left.

Makes sense to retain Brumbys gauge sender in EJ donk esp if the resistance values between two models are different - which is likely

The sensor outputs are different between EJ and EA82, and I think EA81 and 82 are the same. An EA gauge with an EJ sensor will only work through the bottom quarter of its scale.

Dane.

lovey80 · Post by **lovey80** » Mon Jul 09, 2012 11:08 am

How did you add the EA sensor?

GOD · Post by **GOD** » Mon Jul 09, 2012 11:21 am

See the picture? Work out a good spot for the sensor, then drill a hole and weld a threaded bung there. I took it to a cylinder head shop to get it welded.

Dane.

lovey80 · Post by **lovey80** » Mon Jul 09, 2012 12:02 pm

I'm thinking running a separate temperature guage will be easier and cheaper.

steptoe · Post by **steptoe** » Mon Jul 09, 2012 3:32 pm

You are in Brisbane - home of the watchdog, some may say it is easier to get a thrreaded bung welded in , with no extra wires - any aftermarket temp minder/gauge is gonna cost and have a few wires to hook up nicely