Question about 1986 Pontiac Fiero

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I need to know how the alternator is wired to the vehicle in a 1986 pontiac Fiero. mostly the small plug not the main red power. Were do the two small gray wires connect

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Per the shop manual those wires are brown and red. So pull back the black wire cover and check the color of those wires. On the V-6 the small red wire connect to terminal 2 , small brown wire connect to terminal 1. On the I-4 the small red wire connect to terminal S , small brown wire connect to terminal L

Posted on Sep 13, 2009

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1987 pontiac fiero spark plug firing order fron distributor to spark plugs


Hi,

The firing order is - 1 2 4 5 6

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Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Nov 26, 2010 | 1986 Pontiac Fiero

1 Answer

How do you replace alternator on 1986 fiero gt


Remove negative battery cable. Jack up rear of car. Remove passenger side rear wheel. Loosen A/C compressor tension bolt. Remove A/C belt. Disconnect 2 wire plug and single wire bolted to back of alternator. Loosen alternator tension bolt. Remove alternator pivot bolt from up top of bracket. Wiggle out through bottom.

Reverse for install.

Good luck,

Rebel Faggioli

Oct 07, 2010 | 1986 Pontiac Fiero

1 Answer

FIERO GT V6 THE MANIFOKL IS GETING RED AFTER START THE ENGINE, WHAT I HAVE TO DO?


That is usually caused by a plugged exhaust system. Either the converter / pre-converter or muffler is plugged. Also check to make sure EGR valve is working properly

Jun 23, 2010 | 1986 Pontiac Fiero

1 Answer

Whats the spark plug gap for a 1986 fiero 6???/ i reallt need to know i had spart plus put in but my car just got wrose so they really werent the right one i thin or the last 2 i put mayb the ones that...


.045 should be about right.

when you buy spark plugs for your specific vehicle, look on the box or ask the auto parts salesperson, they should have that info

May 19, 2010 | 1986 Pontiac Fiero

1 Answer

Where is the starter wire connected to?


It runs between the starter and the junction on the engine wall next to the battery (the junction has a bunch of red wires and other wires connected to black connectors with lots of wires and a couple metal bolts that secure some connections together)

Apr 16, 2010 | 1986 Pontiac Fiero

1 Answer

Have an 84 Fiero and want to upgrade the alternator to a newer 100 amp style delco from about early/middle 90s. Where do the 3 sensor wires go to (the ones in the plug) not the one on the stud?


If you got the correct replacement alternator, the connector wires should just plug directly in to the new one. Make sure you have the right one, any thick red wire is the output to the battery, the rest i'm not sure, just compare to the old alternator you took out, maybe match up by comparing wire colors

Mar 17, 2010 | 1984 Pontiac Fiero

1 Answer

Runs rich and miss fires


Make sure the spark plug wires are on right (propper firing order), and check the TPS sensor. Are there any exhaust leaks or vacuum leaks? Did you use the original intake manifolds and Holley throttle body? If not you need to replace the PROM chip with the one from the donor car.

Sep 20, 2009 | 1986 Pontiac Fiero

1 Answer

86 fiero voltage spike


Check for bad/corroded ground wires/straps, going to the body and to the motor. 

Jan 10, 2009 | 1986 Pontiac Fiero

1 Answer

Need a wiring diagram for distributor for a 1988 pontiac fiero gt with a 2.8 v6


There are two plugs which are plugged into the distributor one is a two wire  and one is a four wire. the two wire has a pink wire on terminal A and a white wire on terminal B these two wires go to the remote coil  black plug The four wire has a black wire with a red trace on terminal A A tan with black trace on terminal B A purple with white trace on terminal C A white wire on terminal D

Aug 09, 2008 | 1988 Pontiac Fiero

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