2 "?"s : Fuel Power and V-Power/Amoco ult.

[MolaKule]

From the Lab Report:

quote:

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An initial “shock” dosage of 3 oz. per tank may be needed for neglected fuel systems.

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Thereafter use 1 oz/five gallons as maintenance dose.

After third tank treatment, drop down to 89 octane and see if pings or knocks.

Make sure knock sensors are ok, timing is correct, and fuel delivery isn't too lean.

 

[97tbird]

quote:

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Originally posted by MolaKule:
From the Lab Report:

quote:

---

An initial ?shock? dosage of 3 oz. per tank may be needed for neglected fuel systems.

---

Thereafter use 1 oz/five gallons as maintenance dose.

After third tank treatment, drop down to 89 octane and see if pings or knocks.

Make sure knock sensors are ok, timing is correct, and fuel delivery isn't too lean.

---

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Molakule,

Thanks so much for the reply.

If the normal dosage is 1oz/5 gallon, did you mean to say I should use the "shock" dosage of 3 oz. per 5 GALLONS and not per TANK?(My gas tank is 18 gal, so then I should put about 3.6 oz, right?)

How can I verify if the fuel delivery is lean?
(car runs pretty normal on 93 oct.)

Thanks again

 

[Bdiddy]

One thing you should check is the PCV and any other vacuum hoses.

My 95 Tbird with 4.6 has ran pretty well since I got it with about 50,000 miles. Recently it started throwing a p0174 code, indicating lean driver's side bank. Turns out the cause was an obscure piece of vacuum hose tucked away under the throttle body had rotted and developed a pretty big hole. I imagine the hose has had a hole in it since I got the car and only recently could the ECM not adjust the A/F ratio to compensate for it.

So the moral of this story is to check ALL your vacuum hoses, or just go ahead and replace them all.

 

[97tbird]

Hi again,

(1) I have to use 93 oct. to prevent pinging in my 97k miles old 1997 T-bird, which had the mod.4.6L, although I've already cleaned my MAF once.
I really would like to try Fuel Power; so far what prevented me from ordering it was that I have to get it in large conatainers. It doesn't look like that's gonna change in the near future, so I'm going to get it soon, thus the following questions:

(A)For 1st time use, what dosage would be the most effective(car has 97k miles)?
(B)Should I keep using the 93 oct. during the 1st tank/application?
(C)If yes on (B), when would be the ideal point to go the next lower oct(89) and try it out?
(D) After going to a lower oct, and IF it doesn't ping, should I continue to use FP?
if yes, in which dosage?
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(2) IF FP doesn't help me to go to a lower oct.:
I'm trying to decide which gas I want to use; both are available in my area:
BP/Amoco Ultimate or Shell V-Power? Which do you think is better? any feedback/experiences are welcome.

Thanks in advance.

 

[shortyb]

Ok, lets see,

#1a- I'd say the 3oz/5gal OR 2oz of MBF (MolaBrew fuel, 3:1 FP and Neutra) per 5 gallons.

#1b- I would, to avoid adding more variables for the time being.

#1c- 3~5 tankfuls, pinging comes back, continue with 93 for a few more tankfuls.

#1d- Stick with the FP, in the regular 1oz/5gal dosage.

#2-

Dunno, I've pretty much always used Amoco and don't have any experiences good or bad with other fuels.

You can check for a lean condition with a Consult II scan tool or eqivalant. Most should give you a real-time read out of fuel ratio. 14.7:1 is stoichmetric or optimal ratio. Obviously different conditions dictate different fuel ratios, ie: full throttle-richer, but it should not go too much above optimal. The cheap way would be check your plugs for excessively lean condition (bright white insulator tip).