[jimmaki]

There isn't nearly enough pressure to support DI. For port or throttle-body injection nozzles the fuel pressures are typically well under 100 PSI, so air from a common compressor is plenty to get the cleaning mixture moving through.

Is something like this what you're referring to? This must be really old ... pre-sunglasses. Price on Amazon doesn't seem too bad, especially if you install the Capital One discount extension on your browser.

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[Daltongang]

Well this is what Pat Goss recommended. (RIP)

From BG.

BG 22 View VIA® Vehicle Injection Apparatus – BG Products, Inc.

Provides highly effective cleaning for gasoline fuel injection systems.

www.bgprod.com

 

[jimmaki]

[this pulls the OP futher off topic, so not offended if this post gets moved]]

I used this setup for both the Pilot and my Mazda (DI). The Pilot fuel line is simple to separate at the cowl. My Mazda has a disconnect right before the high pressure pump. I use my air compressor to pressurize the canister (with a metal locking air chuck, now) and its onboard regulator set around 30 psi; it's lower than the nominal 60 to 70 psi from the low pressure pump, so it forces the PCM to use longer injector open times during cleaning.

View attachment 158464


The canister is one of these:

View attachment 158465


With this added to a drilled & tapped hole on the bottle cap:

View attachment 158463

Clever idea! $19.95 sure beats $180!

 

[dr bob]

The gizmo I assembled is a DIY clone of the BG system that Pat Goss demo's in his video. For our Pilots. there's a check valve downstream of the pump and filter in the tank, so no return line to pinch before pushing cleaner through the injectors. Having more injector open time as some suggest, with running a lower rail pressure, doesn't change the total mass of fluid passing through an injectors, at least while the PCM is in closed-loop mode.

My throttle-plate spray nozzle is a piece of copper tube with an adjustable brass spray nozzle from a garden chems sprayer, for instance, and a brass quick-connect fitting on the other end. The brass pieces and the copper tube solder up nicely. The cannister I used is almost a gallon total capacity, and I use the connectors from my fuel pressure testing kit to get an assortment of fuel rail fittings for different cars. The gauge on the fuel pressure tester is 1/4" NPT, so a brass "street T" between the gauge and the hoses allows the hose from the cleaner can to plug in. I now have quick-disconnects on both the gauge and the cleaner-can ports to get things set up and working quickly and safely.

From BG, the cleaner for the throttle plate and intake runners is different from the cleaner that gets pushed through injectors, so it's at least a two-step process to clean everything.

I usually run my scope camera down past the throttle to see how much carbon and oil are in there. For cars that have more than a little bit of oil and coking in the runners, it's worthwhile solving the oil carryover issues before wasting time and chemicals trying to sanitize the runners. It's the oil carryover that's coking on the intake valves too when you see big deposits there. Valve stem seals need to be good, and the cam boxes need to drain or get oil pumped out to keep oil off the stem seals and out of the intake ports. Fun stuff...

 

[PHM]

You may want to reconsider putting that heavy oil in the Pilot. It may be working but it's not good for the engine. It would be a strain on the oil pump.

I am going to proper weight, from now on.

 

[AVC]

Having more injector open time as some suggest, with running a lower rail pressure, doesn't change the total mass of fluid passing through an injectors, at least while the PCM is in closed-loop mode.

It doesn't change the total volume dispensed for a firing cycle but it does improve the dwell time (chemical reaction time) of the fluid through the pintle, per compression cycle. I got this from some study years ago, re: parameters for those injector cleaning stations and strategies they use, that would apply to on-vehicle cleaning. With a fixed volume of cleaning solution, cleaning is often more effective with larger dwell times.