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Unread 05-10-2013, 09:26 AM   #1
04Sahara
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Question F.I. Cleaner and Engine RPM?'s

I have a 2013 Jeep Grand Cherokee Laredo (base model) with the Pentastar V6 VVT engine.

First question, is it ok to occasionally put some fuel injector cleaner in the tank (usually after an oil change) just as a preventative thing or will it do harm to something that I may not be aware of?

Second question, when driving on the highway at 100kph (62mph) approximately how many rpm's should I be seeing on the tachometer?

Thank you.

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Unread 05-10-2013, 10:08 AM   #2
Dave2002ti
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FI cleaner

I always used it before an oil change so any deposits went bye bye with the oil change.

I use name brand gas from Shell, Exxon and Mobil so I havent used a FI cleaner in well over a decade. Every once in whil I put in premium since it
has more detergents etc in it.

Other thing you need to do is exercise the engine ie an "Italian tune up" which means take it to the redline in first and second gear and as close as you can get in third with the loud pedal on the floor to push as much fuel through the injectors, valves and combustion chamber as possible. This help keeps things clean. Yeah mpgs suck buts its cheaper in the long run. These days very few vehicles spend a lot of time in the top of the rpm band ith the injectors full open.
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Unread 05-10-2013, 10:38 AM   #3
boyvan
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Dave I had heard of "Italian tune up" but didn't know this was true with the newer technology as well. So far I have never pushed my GC - its a V6 anyways...but still. I am not saying you are wrong but I am curious to know what others think of this.
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Unread 05-10-2013, 01:01 PM   #4
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I tried to do the Italian tune up before and ended up with some black soot on my exhaust tip, so I guess it did something. However I couldn't push it much because it will get to 100mph on 3rd gear. Have to try it again at night or early in the morning when and where it's safe.
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Unread 05-10-2013, 02:08 PM   #5
04Sahara
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Hi: I tend to keep away from the 'off brand' gas and only use name brand with the additives unless there is no other choice at the time.

I've never heard of the "Italian Tune-Up"...think I'd be afraid of blowing up the engine or breaking something internal if I tried doing that.
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Unread 05-10-2013, 03:24 PM   #6
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...you won't blow the engine if you floor it....
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Unread 05-10-2013, 03:28 PM   #7
kens97sto171
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Your seriously thinking that holding the throttle to the floor through 2-3 gears up to 90-100 MPH is gonna hurt something. An Italian tune up helps to blow carbon buildup off the piston crowns and valve train.
Engine should be FULLY up to normal temperature before you do it. And not on a brand new engine .. after 500-1000 miles go for it.
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Unread 05-10-2013, 05:36 PM   #8
04Sahara
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Hello 'kens': Yup, because I don't know, so I'm in kind of a learning curve and appreciate the advise from you people who know better than me can provide and I really value all input.

Thanx

Tom
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Unread 05-10-2013, 08:19 PM   #9
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Quote:
Originally Posted by kens97sto171 View Post
Your seriously thinking that holding the throttle to the floor through 2-3 gears up to 90-100 MPH is gonna hurt something. An Italian tune up helps to blow carbon buildup off the piston crowns and valve train.
Engine should be FULLY up to normal temperature before you do it. And not on a brand new engine .. after 500-1000 miles go for it.
Doing that once a week for 30-60mins will actually do wonders for mpg's in the long run by keeping the carbon buildup in the intake at a min.


Driving like miss daisy will only hurt mpg's and performance after a few thousand miles due to the carbon buildup.
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Unread 05-11-2013, 04:48 AM   #10
97HMCS
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I just did the Italian tune-up yesterday afternoon. I got it up to 90 MPH, but didn't realize there was a cop ahead of me and I was in a 25 MPH school zone. I attempted to explain to the officer how I had read about this on the internet, but he continued to write the citation and mumbled something about being a French model.
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Unread 05-13-2013, 02:10 AM   #11
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Originally Posted by 97HMCS View Post
I just did the Italian tune-up yesterday afternoon. I got it up to 90 MPH, but didn't realize there was a cop ahead of me and I was in a 25 MPH school zone. I attempted to explain to the officer how I had read about this on the internet, but he continued to write the citation and mumbled something about being a French model.
lmao
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Unread 05-13-2013, 07:30 AM   #12
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Originally Posted by 04Sahara View Post
I've never heard of the "Italian Tune-Up"...think I'd be afraid of blowing up the engine or breaking something internal if I tried doing that.
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Unread 05-13-2013, 02:49 PM   #13
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Originally Posted by 97HMCS View Post
I just did the Italian tune-up yesterday afternoon. I got it up to 90 MPH, but didn't realize there was a cop ahead of me and I was in a 25 MPH school zone. I attempted to explain to the officer how I had read about this on the internet, but he continued to write the citation and mumbled something about being a French model.
Classic.
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