Land Yacht
NAXJA Forum User
- Location
- MS
92 unmodified XJ 4.0 HO with no symptoms of problems.
Gas milage has decreased suddenly and I have tuned it up in the last 6 months replacing the plugs, distributor cap & rotor cap, cleaned the injectors, ect., ect. & so on. All basic stuff.
The only mod is a 180 thermostat, installed well before this.
The factory exhaust manifold is cracked pretty bad. Could this be the problem?
TIA for any help.
Gas milage has decreased suddenly and I have tuned it up in the last 6 months replacing the plugs, distributor cap & rotor cap, cleaned the injectors, ect., ect. & so on. All basic stuff.
The only mod is a 180 thermostat, installed well before this.
The factory exhaust manifold is cracked pretty bad. Could this be the problem?
TIA for any help.