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Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=3003
Printed Date: 22 November 2024 at 8:04pm
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com


Topic: Fuel
Posted By: DeathLight443
Subject: Fuel
Date Posted: 01 August 2012 at 12:40am
I got a 1985 Pontiac Fiero V6. Im just asking, how much liter do I put in it. On the internet, My fiero can take 40L. So i tried it. Empty my gas tank and try it. BUT It only took 25-30L. If I take more fuel then it will overflow and the gas will come out. Any help here???



Replies:
Posted By: bcampbell
Date Posted: 03 August 2012 at 12:03am
Chances are there's still fuel in the tank when the gauge
is reading zero. That's the only thing I can think of.
It's the same in my car.

-------------
'86 2m6 F23 5-speed, LSD, 3.5L LX9
'89 Firebird 3500T, T56


Posted By: Dr.Fiero
Date Posted: 04 August 2012 at 6:06am
At least your gauge is reading on the wrong side that way!

Most Fieros run out of gas when the gauge reads 1/4 tank.

The 85's had a slightly smaller tank than the 86/7/8's which were (45L?).



Posted By: Romeo
Date Posted: 04 August 2012 at 2:27pm
Originally posted by Dr.Fiero Dr.Fiero wrote:

At least your gauge is reading on the
wrong side that way!Most Fieros run out of gas when the
gauge reads 1/4 tank.


YUUUP.

-------------
Never shift into reverse without a back-up plan.


Posted By: bcampbell
Date Posted: 06 August 2012 at 12:49am
When I had my gas tank off I cleaned the resistor on the sending unit
and I can drive till my gauge goes to zero. (although I haven't tried
going past 1/16th). Before cleaning it would read full constantly and
resistance was 3 times that required to max the gauge.

-------------
'86 2m6 F23 5-speed, LSD, 3.5L LX9
'89 Firebird 3500T, T56


Posted By: Dr.Fiero
Date Posted: 06 August 2012 at 6:09am
Totally common problem...

It should read between 0 and 90 ohms, with a linear sweep between. Sort of need a graphing meter to really see it, and to see if you have high or low spots. But in a pinch a normal meter will do.

They get varnished over the years.  Almost all GM fuel level sensors do it!



Posted By: Capt Fiero
Date Posted: 06 August 2012 at 9:17am

84-86 10.3 Gallons or about 40 liters

87-88 11.9 Gallons or about 50 liters

Basic rule Empty on an 85 is 30 liters empty on an 88 is 40 liters.  They usually have about a gallon or 2 in the tank after a correct gauge reads empty. 

Side note for those that don't know, the Fuel Pump is cooled by fuel running through it, if you run a Fiero pump empty you reduce its life considerably.  So don't make a habit out of running out of gas or you will get in the habit of replacing fuel pumps.



-------------
Capt Fiero
88 Fiero GT 5spd V6
Eight Fifty Seven GT V8 5spd.



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