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Gtir Motorsport club » General Discusion » Gtir related Discussion » Starting issue

Starting issue

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1 Starting issue on Fri Jun 24, 2016 8:00 am

gtir_woody

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Since I've rewired my car with a Haltech ECU I have this starting issue. It sounds like the starter motor isn't getting enough power.

I currently have the ECU and starter motor wired to a distribution block under the dash with a 0 gauge cable running from the battery.

The battery is brand new.

Posted video below, forgive my alternator belt Laughing

https://vimeo.com/172074413

The wiring instructions said I should have all the haltech + wires connected directly to the battery but I thought it would be ok with my current setup, do you think this could be my problem or something else?

2 Re: Starting issue on Fri Jun 24, 2016 9:27 am

Mr B

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gtir technician
gtir technician
If you got long cable run & quite few joints I would do voltage drop test from starter & if low move test through all joints & cables to see where bad . Do cranking amp test too if got clamp amp meter .
Is battery in boot & what spec is batt, what voltage ecu when cranking !?

3 Re: Starting issue on Fri Jun 24, 2016 9:54 am

ducie54

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You need a big ass earth cable to gearbox

4 Re: Starting issue on Fri Jun 24, 2016 10:14 am

gtir_woody

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@Mr B wrote:If you got long cable run & quite few joints I would do voltage drop test from starter & if low move test through all joints & cables to see where bad . Do cranking amp test too if got clamp amp meter .
Is battery in boot & what spec is batt, what voltage ecu when cranking !?

Thanks B, Ill take the multi-meter out tomorrow and see whats happening

@ducie54 wrote:You need a big ass earth cable to gearbox

Thanks for the advice over the phone mate.

Ill try an earth near the starter, an earth near the dizzy and grounds for the ecu to the block.

5 Re: Starting issue on Fri Jun 24, 2016 10:32 am

ducie54

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Happy to help. Any time you need a big power wire you also need a big earth wire. Goes for anything you wire like fans and fuel pumps.

Now where's my rep point Smile

6 Re: Starting issue on Fri Jun 24, 2016 10:44 am

gtir_woody

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There it is Laughing

7 Re: Starting issue on Fri Jun 24, 2016 11:48 am

Mr B

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gtir technician
gtir technician
Try a quality jump lead or 2 as temporary earth test , if earth lead short length it generally not need be as large as long run + wiring, check earthing at battery too, seen a few batt in boot with serious voltage drop through poor cable but mostly 1 bad join on + or eath . Nice little inspection job for a cold beer or 2 ...

8 Re: Starting issue on Fri Jun 24, 2016 11:58 am

gtir_woody

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Indeed there will be a few beers sorting it out tomorrow afternoon mate Laughing The battery is just behind the drivers seat with a good earth and the 0 gauge cable following the tunnel to a distribution block mounted where the factory ecu would be.

9 Re: Starting issue on Sat Jun 25, 2016 7:00 am

gtir_woody

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Put new earths on the engine, gearbox and battery and problem fixed, thanks for the help Smile

10 Re: Starting issue on Sat Jun 25, 2016 8:46 am

Mr B

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gtir technician
gtir technician
Job jobbed then, how many beers that takeĀ  :-)

11 Re: Starting issue on Sat Jun 25, 2016 9:02 am

gtir_woody

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1 beer and half bottle of JD this arvo Laughing

edit, that included taking my plenum off aswell lol

12 Re: Starting issue on Sat Jun 25, 2016 10:05 am

Mr B

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gtir technician
gtir technician
hahaha :-)
Nice day here, about 32degC, bit of sun but not strong & light breeze. I not on the hard stuff, I got 3 bottles Itchitan green tea & lemon biscuits. JD would put me on the floor after 1/4 a bottle I think lol . Have fun ...

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