General Information The Fiero speedo is fed by the VSS sensor, which is mounted on the transaxle. This sensor produces an output whenever the rear wheels turn, no matter in which direction (so driving backwards won’t turn back your odometer). This output is a sine wave of 4000 pulses per mile. So, in effect, if [...]
The information in this article can be used to troubleshoot or repair your tach if you have some knowledge of electronics, but it can also be used to modify or adjust your tach if you are doing an engine conversion or try to put a backlit V6 tach into an L4 or other car. And [...]
The following is a description of the Fiero‘s ignition system. It applies mainly to the V6′s, but also to the 1984-1986 4 cylinder engines. The 87/88 4 cylinder engines are too different, but 87/88 L4 owners may still want to read on, since they’ll see how their engine is superior to the prior years. I’ll [...]
I don’t know about you, but every second Fiero owner I come across has cruise control problems. Even with my three Fieros, two had a non-functioning and an intermittent cruise respectively. Reason enough to give the Fiero cruise control system the treatment it deserves and hopefully get you cruising again. Even if your cruise is [...]
The symptoms for a bad TCC are obvious: If your car comes to a stop and the engine stalls, but restarts (in neutral), and immediately stalls again if you put it in drive, your TCC is shot. You can verify this by disconnecting the plug facing forward on the transmission near the oxygen sensor. If [...]
While browsing through the 87 Helms manual, I stumbled across the drawing of the instrument cluster on page 8C-8 (see picture). As you can see, Pontiac obviously planned to use the center right indicator light for a low coolant indicator. On cars without the voltmeter this indicator is used for the battery “idiot light”. But [...]
Three of our four Fieros have the 4 speed transaxle, and each of them had shifting problems from day one. All standard methods like shifter cable adjustment as described in the shop manuals, clutch or clutch pedal adjustments brought no notable change. On one of the cars it was impossible to shift into first without [...]
This article is a compilation of some information I have collected on GM’s delay wiper system (as used on the 85-88 Fiero) from various sources. It is by no means complete. I appreciate any and all information you might be able to share about this error prone bugger. Some of this information may or may [...]
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