Vacuum leak detection.

In this article I’ll cover the general things that apply to all Fiero versions, then later I’ll break out the version specific and detail items. Contrary to popular belief, vacuum plumbing problems are a major issue. Even small vacuum leaks can cause major headaches.

A major problem? Why?

The ECM will try to compensate . . . → Read More: Vacuum leak detection.


Knock knock….

Who’s There?

Ping. Ping Who? Ping I just knocked a hole in your piston….

Engine Knock, Fuel Octane and other myths

Thing One: Never use higher Octane fuel than the engine needs to prevent knock.

I’m going to try to greatly simplify a very complex topic here. They write encyclopedias about this stuff. I’m . . . → Read More: Knock knock….


AOD Conversion

The TH440-T4 (4T60, RPO code ME9) is the only GM Automatic Over Drive transmission that will easily drop into otherwise stock Fiero. I’ve been interested in this conversion myself for a long time. I’ve pulled together some of the more pertinent data into this article for those considering the swap. Maybe I’ll get around . . . → Read More: AOD Conversion


Torque Converter

Torque Converter Lockup.

Why is TC locking important?

The biggest reasons are fuel economy and heat control. The TC is the car’s single biggest heat generating device besides the engine. The transmission will run significantly hotter if the TC doesn’t lock. Before listening to people that tell you it doesn’t matter read this article . . . → Read More: Torque Converter