I have a ford falcon Au Series 3
Just started driving made a left turn and accelerated when i heard a loud pop/bang noise.

I stopped put it in N then back in drive and drove home with no noises,
Now i have taken it for a drive today and it felt fine, When i say fine i mean no clunk noises no grinding nothing!, I drove around the block twice then got confident.

Accelerated 60% and BANG, lost Rpm instantly now i still had my foot down during the bang usually if a diff or axle would break i would assume it will rev off its head?? well it didn't then engine seemed to drop to 1,000 Rpm instantly as the noise took place,
then put it into N and Back into drive with no noise doing that and made it home.

I honestly don't know whats going on, and cant get my head around why my rpm dropped when it went bang.

Any help appreciated thank you.

 

 

Attachments:

File comment: tail shaft entering into the gearbox dirty normal looking metal then shiny new metal right near the seal of the gearbox, could the tail shaft of came out or something happen inside the gearbox to push it out? IMG_20140701_121739.jpg [ 311.6 KiB | Viewed 244 times ]

Last edited by SlySlayer on Wed Jul 02, 2014 2:23 pm, edited 1 time in total.

with tailshaft your pic shows normal wear as it has to move in & out gearbox


if its 'only' going 'bang' under heavy acceleration i'd hazard a guess n say its backfiring under load

hopefully soon someone with sum more experience will show up.................

Does it have LPG ????....if so, there's a problem there....like HT leads, or spark plugs or something along those lines.

Yes it is LPG and to add to the situation, when i checked under my bonnet my air filter box that is clipped down wasn't the clips were off it and the filter sucked inside the box

LPG Backfire.

Thanks for the reply guys really appreciate feedback

https://www.youtube.com/watch?v=gk-73uxKFZs

I think your correct mate because it is doing exactly this and sounds the exact same.

Now to work out why and how to stop it

one of your ht leads is buggered , my bro inlaws au was doing that and he got the number one lead changed and fixed it.

Yeah LPG backfire.
That's how they let you know it's time for new leads and plugs.