Just a quick fuel additive question

[Kendan]

Hi all, just picked up a pre-owned 2013 Genesis sedan 3.8. Neat car. Wasn't on my list of potential options, but after test driving it, just had to have it. Anyways, since I don't know what kind of fuel was used previously, I wanted to put in some fuel system cleaner. I'm in Alberta, Canada and wasn't sure where I could find some Chevron cleaner thats been mentioned in the forums, so while at Canadian Tire I bought some Rislone Fuel system cleaner as it was the only one that mentioned both Direct Injection and intake valves on its label. I also filled the tank with Shell Premium as there is no ethanol and more cleaning agents according to shell....
Anyhow, is anyone aware of what the chevron cleaner offers over the Rislone? I know Rislone's been around for years, so i'm assuming they know what they are doing. And if i did come across some of the chevron stuff, probably not to put another bottle of cleaner in so soon.
Thanks in advance!

 

[svensk]

There is no way for fuel system cleaners to touch the intake valves on a GDI engine. The only thing it can do is keep the injectors clean and stabilize the fuel in the tank.

 

[Doc W]

. . . I bought some Rislone Fuel system cleaner as it was the only one that mentioned both Direct Injection and intake valves on its label. . .

I have no experience with Rislone, sorry, but svensk is correct in stating that it will have absolutely no effect in cleaning the intake valves on our GDI engines.

Buildup on the top of the intake valves usually is indicated by driveability problems, rough idling and/or misfires. CRC Industries makes an Intake Valve Cleaner for GDI engines, and I think it's pretty effective. You spray in into the throttle body downsteam of the MAF sensor, let the car hot-soak, then give it a spirited drive.

The intake valve buildup comes from the EGR and PVC systems. If you do a lot of stop & go driving, you might want to increase the frequency of oil changes. And by all means use synthetic oil rather than dino.

Besides CRC, I think BG also offers a product for this application (some kind of a two-part process, but I've never used it).

Try to burn Chevron gas occasionally, otherwise use high-grade Shell since their additive is more concentrated in the high-grade compared to the low-octane fuel.

Hope that helps,

Doc

 

[marinakorp]

I have no experience with Rislone, sorry, but svensk is correct in stating that it will have absolutely no effect in cleaning the intake valves on our GDI engines.

Buildup on the top of the intake valves usually is indicated by driveability problems, rough idling and/or misfires. CRC Industries makes an Intake Valve Cleaner for GDI engines, and I think it's pretty effective. You spray in into the throttle body downsteam of the MAF sensor, let the car hot-soak, then give it a spirited drive.

The intake valve buildup comes from the EGR and PVC systems. If you do a lot of stop & go driving, you might want to increase the frequency of oil changes. And by all means use synthetic oil rather than dino.

Besides CRC, I think BG also offers a product for this application (some kind of a two-part process, but I've never used it).

Try to burn Chevron gas occasionally, otherwise use high-grade Shell since their additive is more concentrated in the high-grade compared to the low-octane fuel.

Hope that helps,

Doc

Hmmm... Thought you said that running gas additives had no affect on the cleanliness. So how would running Chevron / Shell Gas occasionally be a benefit for this issue?

If running the Techron was to assist in cleaning the injectors clean, then there would be a benefit (although not complete) and negate or minimize the need for the Chevron / Shell gasoline.

Please elaborate.

 

[Doc W]

The OP started this thread by saying he wanted a "fuel system cleaner". My comments regarding Chevron & Shell gasoline was pointed at this, specifically for keeping the injectors clean. The gas used will have no effect on the other issue, that being intake valve carbon buildup. The intake valve issue is a separate issue, having nothing to do with the gasoline used. The chemical cleaners I mentioned address the intake valve issue.

Regarding fuel system cleaners for the injectors, I'd much rather keep them clean over a long period of time by using the most effective gasoline, instead of periodically using harsh chemical cleaners on a one-shot basis.

Doc

 

[Doc W]

P.S. Nice Valk!

 

[Kendan]

Thanks for the replies. Was just curious if the Chevron cleaner had any advantages over other brands. I will certainly keep the CRC stuff in mind. For now its Shell Premium (no ethanol) and Pennzoil Ultra synthetic.
Thanks again.

 

[Mark_888]

Thanks for the replies. Was just curious if the Chevron cleaner had any advantages over other brands. I will certainly keep the CRC stuff in mind. For now its Shell Premium (no ethanol) and Pennzoil Ultra synthetic.
Thanks again.

Hyundai Motor America branded Fuel Injector Cleaner is the same as Chevron Fuel Injector Cleaner. That should tell you something, especially if your engine is under warranty.

If you a Costco member, they usually have Chevron Fuel Injector Cleaner at a great price for 6-pack.

 

[rminor]

Has anyone used the CRC cleaner? I'm going to pick up a can and was curious where the best place to disconnect the air intake to spray it in.

 

[DRS]

^^ get the I-V like system that draws it in with vacuum. There are smaller hide fittings at the front if the intake manifold that will work for that. It will idle for 20 minutes as you let it drip in slowly and clean the intake valves. BG makes the system. And I posted another brand I have been using every 10k.

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[HavasuPaPa]

Has anyone used the CRC cleaner? I'm going to pick up a can and was curious where the best place to disconnect the air intake to spray it in.

I used the CRC intake valve cleaner a week ago. Currently there is a $5 rebate on it. I removed the intake tube just above the filter box (3.8 V6). At first, the engine started to die, but then the rpm's came back and it went fine from there. Wear some mechanics gloves. It got very hot on my hand while dispensing the CRC can. I had 20K miles on it. I wish I had done it at 10K also. CRC recomends every 10K miles. I use Mobil 1 oil with a factory filer and use Chevron fuel system cleaner at each oil change (5K miles). I also installed an oil catch can to help reduce oil from the PCV getting into the intake manifold. I plan on keeping the car a long time, so time will tell.
Here is my oil catch can install:
http://genesisowners.com/hyundai-genesis-forum/showthread.php?t=15454&page=2

 

[rminor]

Thanks for the tips. Mine has 41k miles. Better late than never I guess.

 

[rminor]

Did you spray from the air filter end or completely remove the air intake back to the throttle body? The can says to spray past the maf sensor, where is that located?

 

[zielritter]

Did you spray from the air filter end or completely remove the air intake back to the throttle body? The can says to spray past the maf sensor, where is that located?

There's not a MAF on our 2012 V6's. There's an IAT that's built into the filter box, however. From the filter box to the TB there are no sensors (well, MAF like sensors), so spraying anywhere from the air box to the TB should be OK.

 

[rminor]

Thank you. That should make it easier.

 

[HavasuPaPa]

Did you spray from the air filter end or completely remove the air intake back to the throttle body? The can says to spray past the maf sensor, where is that located?

I separated the intake tube at the first connection after the air filter box. The MAF sensor is right where the air leaves the air filter box. You'll notice there is a connector plugged in where the air filter box and outlet tube connect. That is the MAF sensor connector.

 

[zielritter]

I separated the intake tube at the first connection after the air filter box. The MAF sensor is right where the air leaves the air filter box. You'll notice there is a connector plugged in where the air filter box and outlet tube connect. That is the MAF sensor connector.

That's actually an intake temperature sensor and not a MAF sensor. I looked at the shop book on HMAService.com before it went to subscription. I was designing an intake and wanted to make sure I knew what everything did before installing.

 

[rminor]

Just completed it. Hardest part was for my wife trying to hold somewhere near 2000 rpm. I just popped the filter top, rotated it, and sprayed. How does the gdi measure air flow?

 

[zielritter]

Just completed it. Hardest part was for my wife trying to hold somewhere near 2000 rpm. I just popped the filter top, rotated it, and sprayed. How does the gdi measure air flow?

Don't 100% quote me on this, but from what I remember in the schematics it uses a MAP sensor (manifold absolute pressure) built into the intake manifold.

My Elantra had a similar set up. Basically, it uses the temperature reading from the IAT and the pressure from the MAP to determine how to trim the fuel based on the incoming air. Then it's just a feedback loop with the outgoing O2 sensor. So, you have fuel trims made based incoming air and outgoing exhaust composition.