90 Brumby Cutting out while Accelerating

Reg Brumbys · Post by **Reg Brumbys** » Fri Sep 21, 2007 12:12 pm

G'Day Guys,

Got a problem with my new brumby loosing power during accelleration - bad enough that sometimes I have to chuck on the hazards.

Occurs When:
Engine is cold and going up an incline at lower revs
When engine is warm and are in the high revs going up an incline

What I've done so far
I've taken the carby apart and put in new gaskets and the other bits and peices,
put a new fuel filter in (please excuse my ignorance - but I heard there may be 2 fuel filters- where is the other one??)
New spark plugs
Replaced all 5 leads from the dizzy
Adjusted the timing
replaced the ignitor module in the dizzy
I've just sent the Vacum Advance unit off to be re-conditioned as it was buggered (hopefully putting it back on thisarvo).

Any other ideas as to what this might be??

Cheers Lads.

Reg.

89lseries · Post by **89lseries** » Fri Sep 21, 2007 2:44 pm

Brumbys have a filter under the tray and another in the engine bay. i would b definately investigating the fuel pump as well and possibly replacing as they are only around the $100ish mark off memory. i had a simliar problem in me l series

Reg Brumbys · Post by **Reg Brumbys** » Fri Sep 21, 2007 4:37 pm

Thanks for that - I'll give it a shot over the weekend and let you know.

Cheers

Reg

Matatak · Post by **Matatak** » Fri Sep 21, 2007 9:08 pm

definitely try doin the other filter first.
its exactly the same as ur engine bay one.

Suby Wan Kenobi · Post by **Suby Wan Kenobi** » Sat Sep 22, 2007 11:22 pm

Sounds like your float level is too high or you have a wire shorting the fuel cut solonoid or something in that circuit

90brumby · Post by **90brumby** » Sat Sep 22, 2007 11:41 pm

ye like others have said change the other filter but will it do this if u rev it up (in ur drive way) does it still like cut out

DOES THE CARBY HAVE A RETURN LINE if so try and block it off so the fuel cant return to the tank there for supplyin all fuel to the carb

mine was doin this the other day blank the return hoses fixed it i think the fuel pump might b on its way out but this is wrkin 4 now

steptoe · Post by **steptoe** » Sun Sep 23, 2007 11:58 am

and my trick is to blow compressed air through the fuel lines from front to back with all filters and pump disconnected - listen for a thoomp as shoot hits the inside of the tank - and use the sender unit hole to look through - with an empty tank of course.

Reg Brumbys · Post by **Reg Brumbys** » Mon Sep 24, 2007 9:25 am

No - it wouldn't do it sitting in the driveway reving it or even going down a hill and getting up in the revs

I changed the fuel filter and put on the re-conditioned vacum advance unit and it seems to have worked - gave it a good work out first thing on Sunday morning (while it was cold) and it didn't miss a beat up Mt Cootha and then onto the freeway when it was warm and no dramas - Yee Haa!

mullet · Post by **mullet** » Wed Sep 26, 2007 10:53 pm

I had the exact problem a month ago with my brumby did the same as you and even posted here. My rear fuel filter was chocka block with crap . Only by chance that i saw it while looking for the fuel pump.