starting issues on a 4.5

[Toadusmodus]

Guys, trying to help a friend out who is having trouble starting his 4.5 Cerb. Has been sitting around for a couple of weeks, so we have a booster pack connected to battery. Use key fob to de-arm alarm, but when we put the ignition on, there is no fuel pump noise, and it will not even turn over when we hold the start button. I cant check any ECU faults as my lead is not the right type for his newer ecu. Was thinking maybe the crank sensor issue?

[robsco]

Have you checked the fuel pump relay? Its relay 4 on a 4.2, not sure about your friend's though.

[Toadusmodus]

robsco said:

Have you checked the fuel pump relay? Its relay 4 on a 4.2, not sure about your friend's though.

Hmmm, will get him to check. Would that stop the engine from turning over though?

[purpleliability]

It will crank over if there is a crank sensor fault in my experience, it just won't fire spark or fuel.

[robsco]

Not sure - have you left the booster pack connected for a while, or tried boosting it from another car with jump leads? It might be so flat that the booster pack doesn't provide enough power to turn the engine over.

PS - I've been on the drink since early afternoon, so feel free to tell me I'm talking crap. I'm nearly as bad as Fubes in the DIY department.

[spongy]

Sounds like it could be our old friend the immobliser.May be the battery is really flat,but the pump should prime even on a low battery.Crank sensor may be the problem but i doubt it in this case.May even be the silver key has been moved a tad

[robsco]

spongy said:

Sounds like it could be our old friend the immobliser.May be the battery is really flat,but the pump should prime even on a low battery.Crank sensor may be the problem but i doubt it in this case.May even be the silver key has been moved a tad

Depends whether any of the dash lights light up? Could be silver key if there's absolutely nothing at all.

[Toadusmodus]

Thanks for all the ideas, turns out the battery was to blame, would not start even with 2 booster packs connected, but a new battery sorted it! I did tell him.......

[FUBAR]

It'll be the battery for sure.


Pfft to Robsco