The 4.2's fuel filter is in the engine comaprtment - different than the MPFI engines. It's that metal canister on the fuel line right in front of the carb. It has one input and 2 outputs (one to the carb, one is a return line back to the tank). It's stupid easy to replace.... just loosen the hose clamps for each line to remove them. Shouldn't take more then 5 minutes.
'87 YJ Laredo
- 4.0L, AX-15, NP231, 4.10s: 3.5" BDS, 31" Muds
- Donated drive train to the YJ, Parted out the rest
- Buick 225 V6: Painless Wiring Harness, Warn Overdrive & Hubs, 2" Lift, 31" Muds