1991 Pontiac Firebird Logo

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Posted on Mar 01, 2011
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1991 pontiac firebird 5.0lt V8 what size battery(amps) do i need

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  • Posted on Mar 03, 2011
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Joined: Mar 03, 2011
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A standard size for most cars is the most common.
You will want at least a 550 cold cranking amps, but I would recommend at least 700.

Testimonial: "many thanks for your help.firebird merv"

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91 firebird new battery just wont start

I agree, more information would be helpful and engine size too. Also, why did you replace the battery and what was it doing or not doing just prior to the battery change?
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1969 firebird

I guess my first question would be - what are your plans for the car ?
Totally stock, modified, or race ?
Totally stock would be the most valuable in terms of resale. Modified or race would limit the number and type of possible buyers.
It had a straight 6 cyl 250 - a 350 V8 - or 400 V8 when new. The VIN would tell you want the original engine was. And this was before GM swapped engines between brands. So the V8 engines were Pontiac built. The Pontiac 6 cyl was overhead cam.
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How much cranking amps are in a 1991 pontiac firebird starter

cranking amps are rated for battery-the more you have the stronger and longer it will last-cheers Denny
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My son has a 1991 pontiac firebird v8 base model 5.0. The previous owner put in an inline fuel pump, which is now going (confirmed by a mechanic a couple months ago). My son is away at college and...

If you can identify the manufacturer and model of the fuel pump, you can probably locate a replacement on Amazon or by doing a web search. The inline pumps range from 3psi to 100+psi (used for racing and high-performance engines). Any replacement pump that provides 5-10 psi should be usable.
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Spark plug gap size for 1991 formula firebird

See if you still have the Vehicle Emission Control Information label (the VECI label) under the hood on some radiator support member, probably. The spark plug gap is listed on it.
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1991 firebird has spark fuel pump running. will start sometimes and run perfect if you shut it off it will not restart until it wants to still has spark and fuel pump.changed coolant sensor no help any...

Try this - CLEAN your battery cables both top & BOTTOM. Everybody cleans the tops but ignores the bottom ends which are exposed to grease,grime road sludge. What makes me suspect of cables - when cold cables contract and make good contact. As soon as they heat up, they expand and any grease or dirt adds resistance.
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Firebird firing order diagram

For the 1992 Pontiac Firebird:
I do not know if you have the 3.1LV6, 5.0L V8, or 5.7L V8; however I have included all of them below:

For the 3.1L V6:
Firing Order:
1-2-3-4-5-6
Cylinders:
.....(back).....
|..5..|...|..6..|
|..3..|...|..4..|
|..1..|...|..2..|
....(front)
Distributor:
....(back)
......(+)-screw
...3......4
2............5
...1......6
......(+)-screw
....(front)

For the 5.0L V8 and the 5.7L V8:
Firing Order:
1-8-4-3-6-5-7-2
Cylinders:
......(back)........
|..8..|.......|..7..|
|..6..|.......|..5..|
|..4..|.......|..3..|
|..2..|.......|..1..|
.......(front)
Distributor:
....(back)
(+).6...5
3............7
4............2
.....8...1.(+)-screw

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!
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1991 firebird turns over slow,but always starts.

If the battery is in good condition, good connections and passes a load test, the starter may be bad. But be sure the connections and the grounds are good.
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