Question about 1986 Pontiac Fiero

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I have a 1987 pontiac fiero and i took the spark plug wires off the distributor and now i don't know where they go.

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'87 Fieros had distributorless ignition (i.e. coil packs) on the 2.5L Tech IV 4cyl.

2.8L V6's on the other hand still had an electronically controlled dizzy. The firing order for these engines is: 1-2-3-4-5-6. When looking at the engine from the rear of the vehicle, the odd cylinders are closest to you (furthest from the front of the car). The even numbered cylinders are furthest from you (the forward bank of cylinders). Since the engine is mounted transversely (sideways), the 'front' of the engine is actually facing the passenger side of the car. The 'back' of the engine obviously bolts to the transaxle, which occupies the driver's side of the engine bay. Cylinder #1 then becomes the rearmost, pass. side or back, right corner of the engine.

The distributor rotates clockwise when viewed from above. Due to the fact that these cars are older and have had so many different 'mechanics' working on them over the years, you can't always assume that the distributor is still clocked properly. You'll need to find the timing marks on the harmonic balancer (crank pulley neck) and get them near 0 degrees BTDC. Remove cyl.#1 spark plug and determine if the cylinder is on it's compression stroke, or the end of exhaust stroke. Note where rotor is pointing inside distributor cap. If cyl. #1 is on compression stroke, then rotor points to #1 position for wires. If cyl #1 is on end of exhaust stroke, then rotor points to #4 position. Once you know one of the wires, by deduction you should be able to put the other 5+coil wire back on.

Dizzy rotates clockwise when viewed from above.
Firing order: 1-2-3-4-5-6

Next time, remove the wires one at a time, or write the #'s on the dist. cap itself.

"It's okay to make mistakes, just don't make the same one twice."

Posted on Aug 10, 2014

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The firing order on 99% of 4 cylinder engines is 1,3,4,2. look on the distributor (dist) cap and see if it has any marks like a line or a #1 by on e of the plug wire towers. start with that one and then go in the direction the distributor rotor turns. attach wires one by one in the order 1,3,4,2 . to find the direction of rotation take the cap of the distributor and have a friend crank engine for 10 sec. no1 cylinder is in front of engine, i think it is on the right side on the Fiero, where the belts are. if no markings on the dist. cap remove no1 plug and get ti to the top on the compresion stroke ( both valves closed) and see where the rotor in the dist. ends up that is your no 1. hope this helps.

Posted on Aug 29, 2010

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1987 fiero cranks but wont start


If the tach doesn't move while cranking, it's likely the ignition control module in the distributor.

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I need firing order and cylendor locations for replacing rotor and wires


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Hope this helps (remember to rate this answer).

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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

Do you know plug wire line up for a 1995 pontiac fiero 2.3


The Pontiac Fiero was made from 1984 to 1988
In the 84 thru 88 Fiero's they had the 2.5L In-Line 4-Cylinder or the 2.8L V6.
I have included both below

For the 2.5L In-Line 4-Cylinder:
Firing Order:
1 - 3 - 4 - 2
Cylinders:
.........(back)............
|...1....2....3....4...|
.........(front)
Distributor Connections:
..............2
...................(+)
....4
....................1
(+)
..........3

For the 2.8L V6:
Firing Order:
1 - 2 - 3 - 4 - 5 - 6
Cylinders
.......(back).........
|...1.....3.....5...|
|......................|
|...2.....4.....6...|
........(front)
Distributor:
............2
......1.........3
(+)...............(+)
......6.........4
............5

Let me know if this helped, or if you have additional information or questions. Feel Free to contact me at FixYa.com!

Jul 09, 2010 | 1985 Pontiac Fiero

1 Answer

My 86 fiero wont start ? i check the coil no sprak ,, went and got another one replace it the car start onecs then wont start again it cranks but no spark at all ... can some one help me plz


Could be a number of things. Check the distributor cap and rotor, check spark plug wires, check the actual spark plugs for worn or missing electrodes.

It also could be your distributor, but that needs to be checked out in a shop.

Have you checked the fuel? To start a car, it needs fuel + spark. Fuel pump working? Squirt starting fluid in the intake while trying to start it. If it starts for a second and dies, your problem is fuel delivery. If it doesnt, it's probably electrical.

Apr 19, 2010 | 1986 Pontiac Fiero

1 Answer

Spark Plug Gap for 1987 Pontiac Fiero


I believe in that era G.M.had what they called their H.E.I. and it was .060, check on radiator top or in engine compartment or its in the owners manual or better yet call a G.M.. dealer they'll know for sure

Sep 26, 2009 | 1987 Pontiac Fiero

2 Answers

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think you mite have vapor lock in the fuel system-if its a maechanical pump-go to the auto zone or shlep boys there are some remedies viva gov motors

Jul 28, 2009 | 1987 Pontiac Fiero

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1987 fiero starts runs good til you put a load on it then no response.


check vacuum advance module on distributor with cap off **** on hose if advance not moving you have found problem.

May 09, 2009 | 1987 Pontiac Fiero

1 Answer

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


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