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

Hi,

The firing order is - 1 2 4 5 6



Let me know,if needed further assistance.

Hope i helped you.

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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

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

.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

1986 Pontiac Fiero 2.8 liter V-6




Hope this helped (remember comment and rated this post). Good luck.

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)

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

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.

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

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