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Had my carby rebuilt the other day and it was badly corroded, so just flushed my fuel tank and lines. Blew air back thru the feed and return lines for 10 mins each, popped a small dint in my tank out by sealing the outlet and am now draining the tank.
Tank has had about 10L in it and has been sitting there since last May I chucked a litre of metho in before bubbling.
Fuel is this colour but a bit more translucent. Flash makes it look denser than it is. Is this indicative of a badly rusted tank needing work, or just normal-ish for fuel that's been sitting there for a year?
Hmmm think I might run a second fuel filter between the fuel rail and the fuel pump. No issues putting one in the engine bay (away from heat / vibration obviously)??
Doesn't look right to me (I think that urine sample would get you disqualified in the Olympics though), but I'm no expert.
Isn't there some chemical/fuel conditioner type stuff you can use to clean the tank?
Think it's only a stop-gap measure though....
A second filter will help too.
Especially if your driving in dusty conditions and the car sits for a bit.
My old sierra ran very badly after sucking a gutful of dust after a weekend away and all it took was a new filter and Italian tuneup on clean fuel and she ran sweet.
I think the Suzuki carbs are a bit temperamental, especially on angles/uphill when it comes to fuel quality and delivery.
I've hooked up the second filter near the fuel pump just behind the carby, so I should be able to keep a close eye on both fuel colour/clarity and filter cleanness over the next few months. Will see how it goes over that period. I don't really want to drop the tank and replace all the lines unless absolutely necessary - the fuel sample I photographed has been sitting in there stewing for over a year!
Stuck a second fuel filter on the firewall near the fuel pump. Fuel enters top and leaves through the bottom of the filter which is a great setup because while the filter's clean, it only runs 1/4 full of petrol (clearly visible thru plastic housing). As the filter blocks up, the fuel level will rise. Once the fuel level reaches the top of the little filter medium, I'll know its time to change the filter
Left the fuel in there overnight, pumped a litre through tonight, and it came out that lovely fresh pinky ULP colour. I don't think I have major issues so hopefully the carby will stay in good nick for a while.
fuel does tend to separate after sitting in a tank for a extended period of time with no movement. i had an old cr 125 i was rebuilding and it sat in the shed for 3 months with only a liter or 2 of fuel and it was stale like your picture. drain the tank if it the car is not going to be used for a long time.
Rebuild all finished at last - Suzi runs puuuuuurfectly. Have spent the last couple of nights breaking her in (low load but medium revs, a couple of quick blasts to redline once she had 30k's up) and am really happy.
Has regained a lot (relatively speaking!) of torque vs pre-rebuild - a hill that used to be third gear to keep 80kph can now be done in fourth.
For the money and time though, I think a 1.6 conversion would have been the better option.... ah well. Next time
and am now draining the tank.
I chucked a litre of metho in before bubbling.
- Suzi runs puuuuuurfectly. Have spent the last couple of nights breaking her in (low load but medium revs, a couple of quick blasts to redline once she had 30k's up) and am really happy.