Haltech Flex Sensor Vs Gm Flex Sensor

[sinistaGTR]

SO I have a platinum pro and are looking at going flex and stumbled across some American forums that had you can use the GM sensor, you just need to change the plug:

Use a GM flex sensor

Part # 13577394 (long tube) $66 or

Part# 13577379 (short tube)

Either buy the GM Harness and rewire Part # 13352241

or buy the plug and pins yourself

Now they look exactly the same and works out to be a lot cheaper, apparently both are 50-150hz.

Pic below.

Can anyone confirm this

[sinistaGTR]

The other side is that a guy in the states is running this sensor and instead of using a IO expander, he is using a zeitronix ethathnol gauge to convert the signal to a linear 5v signal.

He then inputs that signal into the spare AVI.

The sensor also reads fuel temp, so you use the other AVI to read the fuel temp......

[numleg]

That is how my flex fuel is setup, Zetronix ethanol gauge feeding the Haltech 0-5V.

[JezzaR32GTR]

Keen to find out also

[Kinkstaah]

I wouldn't be surprised if they are rebranded GM sensors - Their external MAP sensors (4-5 bar) which I have are "GM" ones or "Haltech" ones depending on who you ask.

I have the haltech one, and happily paid the extra to make sure it worked.

I wanted to peel the sticker off to look more 'factory' but never did it. Maybe I'll do it and see if the PN under the sticker is there/the same.

[sinistaGTR]

^^^ Yeh thats exactly what the american guys are saying. Some of them even bought the haltech and then sold it later to swap for the GM one.

[GTRPSI]

I always thought they were exactly the same thing relabled when i was looking into them.

[sinistaGTR]

So basically this is very doable.

Zeitronix gauge is $200

GM Ethanol sesnsor and wiris $80

This issue I have run into, is that my dual widebands occupy my AVI inputs into my haltech. So looks like I will have to get the exander box regardless.

If I had the newer CAN widebands.... good to go on the flex set up I have described, as the newer dual bands use the CAN input and not the AVI slots.

[Mitchee]

You have a couple of options.. Go the Zeitronix unit and use 2xAVI's on the Haltech, but by this stage you have spent $500 and have used up 2 valuable inputs (if you have them spare - if not Haltech can mod the AVIP inputs to act as regular AVI's if you have those spare)

Haltech sells a CAN IO Expander Bundle with Flex sensor for RRP$599 (haltech part HT-059906), slightly more expensive but the IO box gives you plenty of extra IO should you need it down the track (fuel/oil/coolant pressure sensors, extra temp sensors etc). You also only use a single digital input on the Haltech to get both Ethanol Content and Fuel Temperature.

[sinistaGTR]

Yeh completely understand those options and I will have to go the IO route,

But the Zeitronix route can be done for $300

Zeitronix gauge is $200

GM Flex sensor $60

(postage and plugs $40)

[scotty nm35]

Most ecu's can get away with using one input, ditching the fuel temp input. It would be nice to have, but surely you have one spare 0-5v input... It depends how you want the tune done, and how hard you plan to push it I guess

Personally I would just run dual maps as there is less chance of a failure. It's not like you will ever run petrol again once you convert.

[lcxu105]

I have been told that gm is the only manufacturer of fuel flex sensor and any others are just rebranded gm products. 

[admS15]

I have been told that gm is the only manufacturer of fuel flex sensor and any others are just rebranded gm products. 

That would be correct, but I believe continental is the manufacturer. Siemens also makes flex sensors of a different type. At the end of the day make sure you buy one from a reputable source, i bought one off ebay that was meant to be of good quality but was no good. I then got one through nistune.

[lcxu105]

If it out of a ve commodore I'm sure Holden would use a quality one from factory.