i,ve got a 93 jeep cherokee 2.5 petrol starts fine runs ok until i go uphill or need power to overtake etc it seems like it is being starved of something and misses replaced air filter no differance. its just like its get up and go has gone any ideas thanks

Can you rev the engine normally? If the catalytic converter is clogged you probably won't get up to or much past 1500rpm.

Can you rev the engine normally? If the catalytic converter is clogged you probably won't get up to or much past 1500rpm.thanks, yes seems to rev properly when parked

First place I'd look would be to the plugs, cap, rotor and plug wires. How long since they've been replaced?

yes seems to rev properly when parked

fuel pump could be on it,s way out. this problem usually shows when climbing hills. can,t sufficiently supply the gas the engine calls for.any bucking when climbing is another fuel pump symptom of failing also.

[quote=longfellow]fuel pump could be on it,s way out. this problem usually shows when climbing hills. can,t sufficiently supply the gas the engine calls for.any bucking when climbing is another fuel pump symptom of failing also.[/quotehi guys, have changed plugs its stopped missing and goes fine up to about 85 kph then wont do any more?any ideas please
toff]

hi guys,have changed plugs its stopped missing and goes ok up to about 85kph then its got no more go any ideas please ?

Someone mentioned possible problem with catyletic converter being plugged.
Have you had a chance to see if converter is ok. This would cause this type of
problem just written above. Like partially plugged condition.:uhoh:

You can put a vacuum gage to the intake manifold with a T and run a long hose to it and bring it into the cabin or tape to the windshield and take for a drive.
Get a reading and report back.

Or you can disconnect exhaust before the cat and drive it. Way noisy though.