ENGINE RICH

My Sub (5.7) Has 205000 Miles With A Rebuilt Engine Installed About 40000 Miles Ago. It Smells Rich And Fuel Mileage Is 10-12 Mpg. The Egr...

Will Running My Buick 3.8 Liter Engine To Rich, Cause Much Problems Later? My Gas Mileage Is A Little Worst I Think? Are There Other Things...

I Have A 94 Grand And It Is Runnnig Rich. 112000 Miles Did A Full Tune Up Plugs Wires, 02 Sensor. Cleaned The Trotlle Body. Changed The...

I've Checked The Vacuum Tubing And Replaced All Of The Ones That Are Connected To The Fuel Injector. I've Done A Regular Tune Up. I'm Not...

Engine Performance Problem 2003 Chevy Avalanche V8 Two Wheel Drive Automatic Avalanche With 5.3 Liter Engine With Codes P0300, P0172...

I Have 1995 Grand Am With A Quad 4 Engine. It Has 110'000 Miles On It. A Few Months Ago I Replaced The Coils, Plugs And The Coil Housing....

1999 Alfa Romeo 156 Ok You Will Have To Bear With Me Here As I Am A 25 Yo Girl That Has No Idea About Cars At All! It May Seem Long...

Ive Have A 1990 Ford Taurus That Started Missing. I Have Gave It A Complete Tune Up As Well As Air Bypass Valve, O2 Sensor, And Ignition...

What Could Be Causing This In A Cummings Engine?

Every Sensor Changed, Not Fuel System Or Computer. Could A Worn Out Timing Chain Cause This? Why?