For the first time - The Animal SPEAKS!

[V8 Vum]

Son and two fire-extinguishers at-the-ready, battery booster on, the key was turned to crank up the oil pressure...CHECK!

Then pumps switched on, and the pleasing whirr of the pumps building pressure sang and stopped...CHECK!

Rush around with the led light and check for fuel leaks - NONE... CHECK!

Son said " Go on Dad! ...start it!" You know something? I was beginning to get cold feet! I did'nt want to do it! My brain was telling me to postpone and do some more procrastination!

Ten seconds went by, then I took a very deep breath, squeezing my eyes shut...and turned the key......COUGH!

Then COUGH... like a giant clearing its throat!

...and the animal spoke for the first time!

Huge grins from me and Son....switch off and checked for fuel leaks...NONE!

Started again....and with a flair... I pressed the throttle expecting an earth shattering roar.....NOTHING?

Checked all was plugged in, including the fly-by wire, all the sensors in place... tried again - nothing...no accelerator?

Unplugged and replugged most sensors, even changed the fly-by-wire cable ...still no accelerator?????

Went to PUB!

And so, the animal idles nicely, but wont BARK!

What have I missed?

Any pearls of wisdom please?

Keith

[spatz]

i think without knowing what engine, ECU, loom it might be difficult to help.

[V8 Vum]

Your right Mate! it is a Briggs & Stratton 150cc lawnmower engine! ....

...oooops... looking at the wrong vehicle!

LS7 GM ECU

Cheers

Keith

Edited by V8 Vum on Monday 13th September 08:55

[spatz]

if you are using a GM ECU you should be able to diagnose a lot of stuff using the OBDII interface. If I remember right you can even get a wireless adaptor that is speaking with an IPhone App. If I would have a OBDII interface I would definetely buy some package that allow you to see all information that is available through that interface.

[V8 Vum]

That sounds very testnical!

What software do I need?

HP Tuners?

...although I have never used anything like this before so this sounds like it could be fun!

Cheers

Keith

Edited by V8 Vum on Monday 13th September 09:53

[UltimaCH]

V8 Vum said:

Son and two fire-extinguishers at-the-ready, battery booster on, the key was turned to crank up the oil pressure...CHECK!

Then pumps switched on, and the pleasing whirr of the pumps building pressure sang and stopped...CHECK!

Rush around with the led light and check for fuel leaks - NONE... CHECK!

Son said " Go on Dad! ...start it!" You know something? I was beginning to get cold feet! I did'nt want to do it! My brain was telling me to postpone and do some more procrastination!

Ten seconds went by, then I took a very deep breath, squeezing my eyes shut...and turned the key......COUGH!

Then COUGH... like a giant clearing its throat!

...and the animal spoke for the first time!

Huge grins from me and Son....switch off and checked for fuel leaks...NONE!

Started again....and with a flair... I pressed the throttle expecting an earth shattering roar.....NOTHING?

Checked all was plugged in, including the fly-by wire, all the sensors in place... tried again - nothing...no accelerator?

Unplugged and replugged most sensors, even changed the fly-by-wire cable ...still no accelerator?????

Went to PUB!

And so, the animal idles nicely, but wont BARK!

What have I missed?

Any pearls of wisdom please?

Keith

Congrats and I can imagine your frustration on not being able to hear more of the animal. Like a baby born which can breath but doesn't (yet) cry....!

[pilbeam_mp62]

V8 Vum said:

Your right Mate! it is a Briggs & Stratton 150cc lawnmower engine! ....

...oooops... looking at the wrong vehicle!

LS7 GM ECU

Cheers

Keith

Edited by V8 Vum on Monday 13th September 08:55

Whaich loom did you end up using ?
I seem to remember you were considering buying the Ultima-specific loom.... did you buy that one, or did you modify another one ?
It has to be a wiring issue I reckon

Regards

[spatz]

HP Tuners probably allows you to change even ECU setting, not sure if your ECU can be opended and tweaked ?
If you only want to know what is going on, that is all you need

http://www.wgsoft.de/de/shop/obd-2-komplettsysteme...

[V8 Vum]

I seem to remember you were considering buying the Ultima-specific loom.... did you buy that one, or did you modify another one ?
It has to be a wiring issue I reckon


The loom is the one supplied by JS!!!!

cheers

Keith

[spatz]

From what I understand is that a LS7 has a motor at the throttle body that is controlled by the fly by wire pedal.
You can try opening the throttle body by hand and see if the MAP and MAF sensor are working.Engine should start reving up.

[738 driver]

Have you checked all the fuses in the power distribution case?

[V8 Vum]

Keep-em coming guys...I can then have a long list to try tonight!

One thought...does anyone know what the wiring colours vs signals are in the fly-by wire cable, so I test the signal, power, and see if the pot is working?

BTW have ordered a wifi dingle, dongle and the Rev app for my iPad/iPhone!

Maybe look at getting the HP Tuners program a bit later if I am stuck!

cheers

Keith

[Gulf LS3]

if there is a problem with the engine the ecm switches the pedal off to protect.

if you un plug the ecm connectors it can clear faults, i think its most likely to be a fuse or relay problem. If you are using a standard gm fuse box is the red light situated inside glowing with the ignition on?

[V8 Vum]

Actually Kyle, that rings a bell!
I seem to remember an orange light on when energised.

What I will do is have a look tonite - wonder if you would not mind a call this evening if I need to, to help me?

Once the whole car is rolling my idea is to come up to you for a careful check-over anyway, before IVA! You may remember me as the Old Grey Haired one who took Robs car out for a very short and nervous spin, a few months ago!

cheers

Keith

[Gulf LS3]

no problem keith..

when you switch the ignition on does the throttle body click ie the throttle body should let you know its receiving a signal from the ecm? If not then check the fuses and relays.

i have had a loom where the wiring to the throttle body was damaged, also if you are using a E67 ecm do you have the correct motorsport throttle body to run with that ecm?

[V8 Vum]

Yes, there is a definate 'Click'. In fact I wondered what that was...couldnt locate where it was coming from, but now I know!

What I will do is check the fuses when I get back...can't think what else it could be. There is an orange light that comes on near the ECU when the ign is switched.
I am looking to buy HP Tuners stuff as said before...is this what you use?

I will pm you ref a tel number if you don't mind that?

cheers

Keith

[V8 Vum]

This is getting frustrating Kyle:

Plugs to both the throttle body and pedal, and connector to ecu fine
Disconnected and reconnected all including the ecu itself
No blown fuses
The throttle body I think is working as I feel a strong resistance pushing back on my gentle attempt to open manually
ECU is an E98
Only 2 relays – one for pump, one for A/C

What’s next?

[Gulf LS3]

have you a facility to check the continuity of the wiring? then you could try and find where the problem is ie the fuse box, pedal or the throttle body.

e98? i will have to read up on that one, i have a pinout diagram for a e67 but im not sure how much use that will to you

i have a pedal you can borrow if it helps but i think its best you find out where the problem lies first, do you know a good auto electrician

[pilbeam_mp62]

V8 Vum said:

The loom is the one supplied by JS!!!!

cheers

Keith

I assume you have already spoken to JS for his advice ?

[pilbeam_mp62]

V8 Vum said:

The loom is the one supplied by JS!!!!

cheers

Keith

I assume you have already spoken to JS for his advice ?