Question about 1984 Pontiac Fiero

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Fiero problems 84 Fiero - while driving the engine runs fast, poor gas milage, tach jumping, radio lights flashing when tach jumps,and head lights and all power flashed and engine slowed, but stayed running.

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 1988 Pont Fiero won't start

are you friggin kidding me, nobody has replide to such a friggin stupid *** question.... that is so basic please call me and i will fix it over the phone......562-503-5134 isaac

Posted on Feb 21, 2009

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  • 21 Answers

SOURCE: 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

Posted on Apr 23, 2009

cadman000
  • 607 Answers

SOURCE: fiero idles but stumbles on acceleration

Replace that cap and rotor, most likely your problem will disappear. Hope this helps

Posted on May 01, 2009

  • 40 Answers

SOURCE: Check Engine Light on and flashing on Montana 2001

Most major Autoparts stores will get the Diagnostic codes from car computer and give you info on why light is on and what the problem is.

Posted on Jun 01, 2009

  • 14036 Answers

SOURCE: what is the 1987 pontiac fiero gt v6 check engine

CODE 12- NO DISTRIBUTOR REFERENCE PULSES ECM. CODE 13- OXYGEN CIRCUIT. CODE 14- COOLANT SENSOR HIGH TEMP CODE 15- COOLANT SENSOR LOW TEMP. CODE 21 - THROTTLE POSITION SENSOR VOLTAGE HIGH.CODE 22 - THROTTLE POSITION SENSOR VOLTAGE LOW.CODE - 23 MIXTURE CONTROL SOLENOID.FOR CARBURETOR ENGINE. CODE 24 -VECHICLE SPEED SENSOR. CODE 32 - BARO CIRCUIT LOW.CODE 32 - FUEL INJECTED EGR VALVE VACUUM SWITCH SHORTED TO GROUND.OR EGR VALVE SOLENOID CIRCUIT OPEN. CODE 33 - MAP SENSOR.CODE 34 - VACUUM SENSOR OR MAP SENSOR.CODE 35 - IDLE SPEED CONTROL. CODE 41 - EST CIRCUIT. CODE 42 - ELECTRONIC SPARK TIMING.CODE 43 - ELECTRONIC SPARK CONTROL UNIT. CODE 44 - LEAN EXHAUST.CODE 45 - RICH EXHAUST. CODE 51 - PROM OR MEM CAL.CODE 52 - CALPAK. CODE 53 -EGR VALVE CARBURETED ENGINE THE EGR VALVE VACUUM SENSOR HAS RECEIVED IMPROPER EGR VACUUM. CODE 54 - M C SOLENOID CARBURETED ENGINE MIXTURE CONTROL SOLENOID SHORTED OR FAULTY ECM.CODE 54- FUEL INJECTED ENGINE FUEL PUMP VOLTAGE IS LOW.CODE 55 - ECM MAKE SURE PCM GROUND CONNECTIONS ARE TIGHT.IF OKAY.REPLACE THE ECM.

Posted on Mar 27, 2010

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1 Answer

How do i use the diagnostic tool (tools) in my 1987 Pontiac Fiero GT?


Your Fiero uses the OBDI system. Do you have a OBDI scan tool? A OBDII scanner will not work on your car. It is possible to jump across the A and B terminals on the ALDL connector under the dash, using a metal paper clip as a jumper. The trouble codes would appear on the dash as a blinking check engine light. If you wish, I can get the website that has excellent instructions on readidng the flashes to determine the codes.

Jan 29, 2011 | 1987 Pontiac Fiero

1 Answer

Engine will pump gas to start the engine but as soon as it started it would start pumping gas? i have a 84 thats doing it


The 84 was the first year of production and tended to have some problems. You can go to
www.fierostore.com
for fiero specialists and parts.
Hope this helps!!

Nov 17, 2010 | 1986 Pontiac Fiero

1 Answer

Tachometer on my 1986 fiero gt is out of calibration it ,engine runs right but tachometer is off the graphs limits.


There's a good chance that the tachometer switch setting on the tachometer is broken. They use the same tach for different engine sizes and change the amount of cylinders with the switch. You might have to replace the tach

Jun 15, 2010 | 1986 Pontiac Fiero

1 Answer

1987 Fiero GT automatic trans. Won't turn over-ran fine the day before. Even with a jump nothing works, radio, lights, break lights. There is no click or anything when the ignition is turned even the...


So no power anywhere? Nothing at all? I'm assuming the battery is fine since it ran the day before.

This actually happened to me one time in my fiero

What is happening is no power is getting to the car at all, no power is reaching the engine, lights, interior, etc.

This simply or not so simply means there is a severed connection from the battery.

1) Check BOTH positive and negative connections, make sure the posts are clean and make a solid metal-to-metal contact and see if there is power yet.

2) Check the power junction area (or whatever it's called) in the engine bay (on the passenger side wall near the battery). There are red wires
and such which supplies the car with power in this junction area attached to posts and inside of black plastic connectors. Look for worn or severed wires which may have come loose over the years.

When this happened to my fiero, one of the wires corroded and came loose from the post where it was bolted on and attached to other wires.

Just reconnect the loose wire(s), you may have to crimp new ends or whatever, but that should fix it.

If not, start hunting for where the 12v supply from the battery is cut off. Use a multimeter and good luck!



May 10, 2010 | 1987 Pontiac Fiero

1 Answer

Where does the OBD reader plug into in the 88 Fiero? Need to run codes to see why ck engine light intermittingly goes on and off...


On my 84 I had many years ago, I had to remove the panel right behind (rear of )the shifter. If I remember the cigaette lighter was there as well.
How is the Fiero running?
I still wish I had mine, but kids got in the way, and the high price of replacement parts.

Jan 05, 2010 | 1988 Pontiac Fiero

1 Answer

Where is the brake light relay on a 1984 Fiero


Check the brake light switch. It's located under the dash by the brake pedal. Disconnect the electrical connector from the switch. Jump the connector with a paper clip. Be careful not to let the paper clip touch a metal surface. If the brake lights come on then the problem is a faulty brake light switch.

Sep 27, 2009 | 1984 Pontiac Fiero

1 Answer

1984 fiero


sounds like u got a timming issue or a wire on the wrong plug geta book and check your firing order

Feb 06, 2009 | 1984 Pontiac Fiero

1 Answer

Tail lights fora 1986 Fiero


rear of the car is totally different, if you want to do the gt conversion you will need to exchange the whole rear clip.
gt light are wider,cant use just the lens or cover.check for parts at vegas fiero club

Jan 27, 2009 | 1986 Pontiac Fiero

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