mad dog

Was wondering why you go over a bump in the road or a speed bump sounds like the rear is bottoming out i thought it was the shocks but i checked the shocks there good. The check engine lt came on here are the codes i got 172 ego not switching,lean exhaust bank 1 - 223 no dueal plug inhibit dpi control- 224 1,2,3,or4 circuit failure i checked the fuses there good.thanks for any help you can give..

sleeper_inc

Bad springs/exhaust hitting

codes
172 - Oxygen sensor not switching - system is or was lean
Bad o2 sensor or a loose wire
223 - Dual Plug (DPI), SPOUT or IDM circuit fault
Dose your tach work? get coil packs and ICM tested to make sure they are working right
224 - Failure in ignition coil primary circuit
Check above

mad dog

A mech told me today the pinion was worn out in it i looked in the chilton maual when i got home didnt see a pinion in the rear end and why would that make it ride rough.

sleeper_inc

A pinion transfers motion into the axle from the drive shaft. If it's worn out it will cause a clunk if the car accelerates hard or it could make sound at speed

97tplsGT

When I had my first car (88 4banger) it would bottom out like you're talking about. Im sure it was because of the massive stereo I had in it (2 jlaudio w6 18's, PPI 1800w amp ). Im so sure because it didnt start until after I installed it, lol. A quick fix that worked for me was some spring spacers that I bought from advance auto parts. They were just wrenched in between the coils of the springs. Worked for me all the way until I sold the car.