Is the ZJ fitted with an air flow meter ?. I notice that the air filter seems to go directly to the Throttle Body !.

My mechanical knowledge is - I admit fairly limited but I thought the meter was a main part of a petrol fuel injection system

 

Yes it is on the throtle body where the intake tube connects. Its on the backside (firewall).

 

Not a Mass Air Flow sensor, but a Manifold Absolute Pressure sensor. Uses manifold vacuum instead of air flow to determine how much load is on the engine.

 

I have a can of stuff that cleans the injectors valves etc, you have to disconnect the air flow meter before you use it.
When I disconnected the one on my Jag the engine cut out so I couldn't use it.

I'll try it on the GC later on.

 

the mass air flow sensor and air mass meter is on the intake tube just before the throttle body. these sensors are extremely sensitive.

 

No mass air flow meter on an XJ or ZJ.

 

I sprayed the can into the engine without any problem, time will tell if fuel economy improves as claimed

 

Don't hold your breath. I jumped a full 1mpg just by lowering my average speed to 65 instead of 70 on the highway. I started out at 15mpg when I first got my 95ZJ. I swapped the injectors out for some Neon 703sand it jumped up to 17.5. Did a complete tune up with new filters, plugs, wires, cap and rotor, and changed the oil to 10w40. I also removed the cross bars from the roof rack, and removed the POS 2"spacer lift. The best I've recorded since all of that was 19.1mpg