So after reading the mannual It says the max likes higer octane (91) I just filled up with 87 ....so would It do any harm to put in some octane booster? When i start the car in the morning sometimes the engine sputters and wants to stall unless I give it gas....So I'm thinking it sthe gas....unless you guys think its something different?

 

water in the gas or bad fuel or clogged injectors or bad coil pack or bad plug or...

shall I go on?


Octain boost will fix the low fuel issue, but the only problem you should see is knocking, not stutterin to my knowlege. You have something else going on as well.

 

Agreed, I doubt octane booster will fix this. Seafoam it.

 

uh, no. Get some iso-propal alcohol in the gas tank to mix the gas and water again (ethanol attracks water and at .5% water, the ethanol and water separate out and sink to the bottom of the tank where your pump is sucking).

 

octane boosters..... waste of money.... just run the car with 91+, also might want ot flush your injectors,.....

 

octane booster did nothin for me....im runnin 93 octane since i got the car n still pinging.....
but i got the dealership to swap the engine for a new one.

 

Are you saying IPA is ethanol?

Isopropyl > iso-propal. (IPA)

IPA =/ ethanol

 

drfuelmax

mmkay?

 

mmmk

 

If you add up the cost of a decent octane booster (not the 99 cent store s**t) and divide that by 15 (the average gallons needed when the idiot light comes on) you'll see it's cheaper to pump in premium!

 

Octane booster is garbage. Even though gas is $100 per gal. Its not worth messing up your car to save a few bucks. You will be needing what you saved to fix it...

 

seafoam will fix anything

 

will it fix my headache...

 

Don't drink so much...

 

cann't stop that....... hehehehe

 

12 pack of Bud waiting for the tranny fluid to drain...


Your filter change write up > *

 

I think ill just throw some 91 in there thants for the help guys

 

(WARNING, COMPTONSPEAK)
w3rd

 

You did not say how many miles you have on your Max. There is a chance your fuel injectors are partially plugged. I believe in giving my injectors a cleaning every 7.5K miles by running a bottle of Techron through them (blended into a full tank of gas) just before I change my motor oil (synthetic). That would be my first line of attack on this problem.

If you are not getting pre-ignition (knocking), then the 87 octane is probably not the problem. I run regular in my Max all the time and have no problems -- even run 85 octane here at 6 K feet elevation. In my 04 owners manual it says that regular gasoline is OK to run in the 10.3 to 1 compression ration VQ engine. Given that your VQ is only 10.0 to 1 -- this should also hold for your VQ.

If you frequently race and or call for WOT, you should run only premium gasoline in your VQ. Otherwise regular is fine and appears to give slightly better gasoline mileage when cruising (not stop and go) on the interstates.

 

When was the last time you changed your fuel filter?

 

The fuel filter could be the problem. But this filter will be more of a problem if you call for WOT (wide open throttle). If the filter is the problem, the engine will sputter and not run right because the filter is starving the engine for fuel. Try it and see what happens.