Injector Flush

[Rmay]

I'm having an injector flush done, and I recall someone mentioning that the fuel filter should be changed after it is done. Is this so? Also, is there anything else to look out for in this process?

[Mayhem_J30]

I don't know why the filter should be replaced when having the injectors flushed since the filter comes before the injectors. But it easy a cheap and easy job and you might as well do it while the hood is open. Just make sure the fuel line is depressurized, which it probably will be if you're doing the injectors. I usually do this by just pulling the fuse to the fuel pump until the engine dies from fuel starvation. I think there's another method by using the gas pedal or something.

[Professor_Mike]

Fuel filter replacement is more related to miles driven, 30k miles is a good interval.

[Q45tech]

It's a total process since the fuel lines are looped back on themselves while the 30 minute rail flush is running the engine from the pressurized metal bottle of fuel subsititue/solvent/detergent.BG 44k is put in the tank 5-10 gallons or 2 with 22 gallons this rapid recirculation frees up crud in the pipes leading to/from fuel filter.

There willl be some after effects as loose particles may dislodge after the system is returned to normal and during the blow the soot/doors off phase thus a new filter.

I change my filter every 6 months and always find junk after cutting it open.it really depends on local gas and how often you change the 6 rubber fuel hoses!.......as different fuels react differently with the inside rubber!

[alexhho]

It's a total process since the fuel lines are looped back on themselves while the 30 minute rail flush is running the engine from the pressurized metal bottle of fuel subsititue/solvent/detergent.BG 44k is put in the tank 5-10 gallons or 2 with 22 gallons this rapid recirculation frees up crud in the pipes leading to/from fuel filter.

There willl be some after effects as loose particles may dislodge after the system is returned to normal and during the blow the soot/doors off phase thus a new filter.

I change my filter every 6 months and always find junk after cutting it open.it really depends on local gas and how often you change the 6 rubber fuel hoses!.......as different fuels react differently with the inside rubber!

Where can one find the BG 44K product? After reading several posts from the forum, I set out to look for this product. I have tried a few automotive stores, Walmart, Target to no avail.

[Q451990]

BG Products are typically available only at local repair shops... you might call your local distributor from the list at http://www.bgprod.com/locator.html

Also, I think Joe at Infiniti of Scottsdale can ship the stuff to you UPS.

Heath

[Q45tech]

"Fuel filter replacement is more related to miles driven, 30k miles is a good interval."

With the wide variance of miles driven it is hard to set a fixed mileage interval since the pump runs whenever the engine runs and fuel is being circulated at idle [1/10 amount vs WOT....1/4 amount at cruise] 4 gallons per hour to 40 gallons per hour.Lets use 15 gallons per hour....1/4 of a gallon [1 US quart] per minute as a good average so the entire tank gets filtered once every 90 minutes.

The question is how much dirt [water] is in a tank full !

30,000 miles would be 1,580 gallons........1 ounce of dirt in [128x 22.5=2880] is 0.00035 or 99.965%...... is it pure 99.9999985%....is every one of the 70-100-140 fillups that pure?

What are you chances of NOT getting 1 ounce of dirt in 4,550,400 ounces of gasoline.........the same as if you bought 9 tickets to the Georgia Lottery and expected to win $35,000,000.

I think annually is a good safe interval but many people go longer.

Eventually as the paper clogs the pressure maybe enough to punch thru the filter and your injectors get flooded with dirt?

Important to make sure you have 43.4 psi at the rail input at WOT [4,000-6,900], as I have seen some cars that make it a few seconds but it drops due to the filter resistance so the engine goes flat in long acceleration [5-15 seconds worth]!

Also recommend that all the fuel hoses be changed once every 100,000 miles as that is the test interval [for internal destruction and peeling] for the hoses! If you use oxygenated fuels you may have to do it more often!

[alexhho]

BG Products are typically available only at local repair shops... you might call your local distributor from the list at http://www.bgprod.com/locator.html

Also, I think Joe at Infiniti of Scottsdale can ship the stuff to you UPS.

Heath

Thank you. That was a great link. I'll try the product out as soon as I get it. Take care.

[Mayhem_J30]

Where can one find the BG 44K product? After reading several posts from the forum, I set out to look for this product. I have tried a few automotive stores, Walmart, Target to no avail.

if you don't have a distributor nearby, i noticed that http://www.infinitipartsusa.com is carrying bg44k now.

dennis, after running a bottle through at the recommended potency is a rail flush still necessary? what are the advantages of the flush and what all does it accomplish? Also when you say the fuel lines should be replaced after 100,000 miles, does that include the line all the way back to the tank?