Electronic Fuel Systems Class Update

One classmate brought in his Jeep and we swapped wheels. They're BIG!

December is going to be the end of my last automotive class at York Technical College, and this last class is all about Electronic Fuel Systems. We've learned about how the fuel system works, focused on diagnosing problems, learned about using a scan tool to track Oxygen sensors, Short Term Fuel Trim, Long Term Fuel Trim, and plenty of other related engine topics such as turbos and superchargers. We're also spending time in the shop working on various automobiles, so here's a look at some recent activity. 

A peek inside a rear differential

This class is titled Electronic Fuel Systems, so that includes the system from the intake, turbos, superchargers, the engine, and all the way through the exhaust, catalytic converters, mufflers, and tailpipe. 

A big blue spacer on those big Jeep wheels. 

Trying to find the source of an oil leak? Give this a try. 

Inside of a supercharger.

Inside of a turbo.

Cutaway inside of a muffler. 

Catalytic converter that needs to be replaced. 

Looking up to where the exhaust comes down to the catalytic converter, and you can see the upstream oxygen sensor up there. 

Another student's car, he's putting a turbo in his Miata. Next photo is the turbo initial install. 

Nothing to see here, but we've spent several days on this 1998 Buick LeSabre tracking down an issue that affects cruise control, brake lights, and the transmission. The brake pedal light switch is related to all of those systems, so we've been using a multimeter to test all the wires involved. Another easier to solve issue was a trouble code on the evap cannister, we found two hoses that had disintegrated and come loose, so we fixed that part easily. 

Four cylinder exhaust manifold into a catalytic converter. What I think is funny is the big arrow on the silver part, so that you know which way the exhaust flows through the cat. Maybe someone installed one backwards!