Aussieveedubbers · Tech Talk

Engine not revving through

https://forums.aussieveedubbers.com/threads/86986/engine-not-revving-through

t_tuffnut ·

hi, just need some advice. My stock 1300 bug is giving me some grief. It will kick over on full gas, splutter a bit and start to rev, then continue to struggle and then stall. I have drained the carby through the 13mm bolt at the bottom, though it looked quite clean.
Any ideas? Fuel filter looks fine, its a new fuel pump, new lines and tank. Could it be a crappy spark or just the carby needing an overhaul? I've got my head around certain areas of the bug, but i really could use a crash course on engine trouble shooting. Thanks Ian for the carby suggestion.

jjwebb123 ·

G-day mate.
It could be spark,have the plugs been replaced?
Also could be sucking in air,but sounds more like fuel or spark problem to me.
Good Luck

greedy53 ·

Have you checked to seeif the fuel pump filter vis clean and your online filer is also clean

t_tuffnut ·

hi Jason, no, the plugs are still the old ones that came with the car - god knows how old they are. I'll pull one tomorrow and get some new ones. I've got some new cables as well that I might try installing.

Hi Greedy, I've visually inspected the in line filter and it seems fine. I'll look into the fuel pump filter tomorrow as well - thanks for the tip!

Thanks for the advice - I posted this from the doctor's waiting room via my phone. 3 Hour wait for a 10 minute consult. 3 hours. So we waited 20 minutes for every minute and 20 seconds we saw him. 3 Hours. 10 minute visit. Good results, so mustn't complain. 3 hours.

greedy53 ·

Take the fuel line of the cardy and see if the fuel runs out well by holding the fuel line down.
Good luck

t_tuffnut ·

I found some fine splits in the fuel line just before the pump, so i cut that section out and refit it. I then checked the plugs which were very sooty, so i cleaned em all. I then thought about the dizzy cap and remembered i had a spare, one of the flashy empi see thru ones that are meant to be crap, but it chucked it on anyway for a test. Fired it up and it runs sweet.
Then bought some new ngk plugs and took it for a drive. What an improvement! Like a different car!
It could be the rotor cap, but t is running sweet now, so im happy again. Thanks for the advice though.