Yellow fuel?

[Stengord]

After some troubles with my 88 sierra, we got it running after playing around with the cam gear, it ran fine for a few days then it had trouble in 1st and 2nd with jerking around (felt like a combination of fuel troubles and a slipping clutch)

So I took the fuel filter off, its dirty, as expected but it has yellow fuel coming out
Currently siphoning the tank and it is all yellow!?!??

What would make a cars fuel yellow?
Some kind of additive such as carby/injector cleaner?


any help appreciated

[short stuff]

maybe abit rusty in side

[Stengord]

its more of a urine yellow then an orange yellow

[nicbeer]

ultimate 98 i think is yellow. not 100% sure thou

[pcman]

doesnt the crappy ethanol fuel have a yellow colour too it

[coxy321]

How old is the fuel??? And does it stink?

Drain the bowl, drain the tank, replace your filter, and run FRESH fuel right through it.

[Stengord]

Sorry I forgot to mention I just bought it a few weeks ago, and have had troubles since
Thats why I thought there was additives added to make it run that little better when I test drove

The tank is nearly empty, to dark to keep siphoning now , but I planned on running new fuel on it

Thanks for your help so far guys!

[pongo]

different fuel companies use different colour dyes. Part reason is if you try to sure for fuel related damges they can use a colour chart to see how pure the fuel is.

Pretty sure like said, BP is yellow.

Cheers

[Stengord]

Righto I'll get a jerry can of BP fuel tomorrow morning and let you all know how it goes

[toaddog]

Maybe someone peed in your fuel tank?

[T_Diesel]

doesnt the crappy ethanol fuel have a yellow colour too it

Yep.

[mrw82]

ULP 91 is purple, this includes ULPE10
ULP95 and ULP98 are yellow. this includes E95 and E98
diesel is fluroescent yellow or can be clear(watery looking)

octane level/grade of fuel determines the colour dye they put in, not whether it has E10 or not. this is the same for all oil companys.

you have premium grade fuel in the tank (could be 95 or 98), either that or someones been pissin in the tank.
blame the rough running on the dirty filter.

[christover1]

My Sierra won't run on 96 or 98.
I need to run 91.
Motor cycle riders tell me that the fuel is to dense for smaller jets.
Zooks have tiny jets that block up easily.
I have no tech to back this up.
But its true for mine.
Try 91 for a while, as well as cleaning system out, extra filter before carby and after pump..
I use an inline efi filter from a commodre 9I think)

christover

[PJ.zook]

The only difference is (in lay terms) the octane grade of the fuel. The higher the number, the harder it is to burn and therefore reduces risk of pre-combustion.

[Jacked]

yes premium is yellow

My Sierra won't run on 96 or 98.
I need to run 91.
Motor cycle riders tell me that the fuel is to dense for smaller jets.
Zooks have tiny jets that block up easily.
I have no tech to back this up.
But its true for mine.
Try 91 for a while, as well as cleaning system out, extra filter before carby and after pump..
I use an inline efi filter from a commodre 9I think)

christover

thats correct, i dont know about the sizing of the jets in your carb but on my bike i only run regular. there is a slightly differnt viscosity between regular and premium. leans out on premium.

bring back leaded fuel :(

[Stengord]

Thanks so much for this info guys!
I should probably get a lockable cap just in case anyway

[Jacked]

might be due for a back fire

swap leads 2 and 3 over and rev the guts out of it.

check leads for resistance, cap and rotor etc etc

[lump_a_charcoal]

different fuel companies use different colour dyes.
Pretty sure like said, BP is yellow.

Cheers

Yeah Bees pee yellow.

[Stengord]

We put some regular unleaded in and played around with the timing
The timing was out by 10*
Set the idle revs to 1100 for the next few days to see how it goes

Thanks for your help guys

[coxy321]

ONLY 10 degrees??!!!

Hope its all sorted for you.

[Stengord]

Yep only 10 lol
Hopefully its fine over the next few days