Engine Performance problem
1994 Daihatsu Mira Front Wheel Drive Manual 119000 miles
My car experiences violent bucking when engine is warm. The top speed is limited as a result of this bucking that kicks in at 70mph. I also have this problem occurring randomly at lower gears upon acceleration. Could this be an EGR valve problem? I have already upgraded the fuel pump, fuel filter, and larger injectors, but the problem remains. I'm extremely annoyed. Please help.