Question about 1986 Pontiac Fiero

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86 fiero overheating

Starting overheating all of a sudden

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Low on coolant, air bubble in coolant, water pump faulty, coolant fan motor/relay/switch/fuse bad, collapsed hose only when RPMs are raised, bad thermostat, any of these could be the cause. Low coolant and electrical issues are easy enough to sort out.
Good Luck!

Posted on Nov 07, 2014


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Posted on Jan 02, 2017

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SOURCE: How do you know when the fuel pump is bad? My 86

When it fails to start test for spark at spark plug wires, if no spark then it is not the fuel pump ,it would be a ignition mogul in distributor, if spark is OK ,Then test fuel pump with fuel pump gage ,you can ask your local part's store that you in tend on buying the part from if they can lone or rent you the test gage & look up specks,Fallow all warnings.Hope this helps .

Posted on Mar 23, 2010

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I have an 86 fiero 2.8 v6 the car will start and idle.. when I push the gas to rev it up in park it dies and wont restart for hours.. I had the ignition module checked and they said it was good?? any...

Please check the fuel pressure, there is a fitting similar to the refill for the a/c located on the fuel rail. You local parts store may have the gauge available for rental.

Hope this helps.

Feb 19, 2011 | 1986 Pontiac Fiero

1 Answer

1985 Fiero: headlights will not go back down...

Fiero headlights are headaches, especially the early years (84-86). Be glad they are stuck up and not down!

Does it make a grinding noise or anything while trying to go back down?

If so, the internal nylon gears are worn and need to be replaced with metal ones and good lithium grease.

If no noise while trying to go down, then it's a power problem. Check the blue connector going to the headlamp, careful in this area, they motors can turn on/off suddenly if the power is restored to them. Don't get your hand caught in there!

There are also relays to check, 1 for each motor and 1 main one for the headlamps, get a haynes manual to find them. They are little black boxes.

Also, could be your on/off headlight switch, take it out of the dash to see if wires are loose.

There are lots of forums online about these headlights and how to fix them. Look around and good luck!

May 18, 2010 | 1985 Pontiac Fiero

1 Answer

How to change struts on 86 pontiac fiero

Jack up car.
Remove tires on back.
Remove Nut on top of each strut, located inside engine hatch.
Remove lower bolts from spindle.
Remove strut.
Use spring compressor to remove springs.
Reverse procedure to replace.

Apr 30, 2010 | 1986 Pontiac Fiero

2 Answers

I need the firing order for an '86 fiero 2.8L V-6

The firing order for this car from right to left is:-

4 Cylinder is 1-3-4-2.


V6 or 6 Cylinder is 1-3-6-2-5-4.

Good luck and thanks for using Fixya.

Apr 11, 2010 | 1986 Pontiac Fiero

1 Answer

My 86 Fiero SE clutch master cylinder is weeping

Replace it. Not a difficult job. Be careful the bracket on the V6 4spd. isn't strong so don't break it while loosening the slave cylinder retaining nuts.

Good luck,

Rebel Faggioli

Dec 30, 2009 | 1986 Pontiac Fiero

1 Answer

Radio and horn will not work

I had the same exact issue today on my 86 Fiero. The Radio and Horn stopped working same time. There is a 20 amp fuse that is marked for the Horn but no mention of the radio. It is in the middle of the Fuse box. 86 -88 should have the same fuse box. ( If you reference the Chilton book they say the fuse is for Horn Cigarette lighter etc. but again no mention of the radio) I just happened to check this fuse (It was blown) and sure enough everything came back. Hope this helps......

Fiero R12

May 21, 2009 | 1987 Pontiac Fiero

2 Answers

Fuse box

try here you can download the pdf files

contains the fuse box diagram on page 101 of 111 of the pdf reader.

Nov 18, 2008 | 1986 Pontiac Fiero

1 Answer

Fan onradiator 86 fiero

your fan is in the front under the hood even though ur engine is in the rear

Jun 13, 2008 | 1986 Pontiac Fiero

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