94 wrangler, runs great a low speed (below 40) normal driving....but as soon as I get on the gas it hesitates and the engine shuts down like the key was turned off til I back off the accelerater. High speed simply stepping on accelerater causes the same reaction. push the clutch in rev the engine it will start to rev then shuts down like above
I have checked the fuel pump with a meter, it checks out strong, return fuel line works fine, changed fuel filter along frame checked fuel lines all good fuel tank is poly type so no rust good gas (just cleaned tank) have run fuel injector cleaners numerous times, changed spark plugs rotor cap distributer cap checked plug wires WHATS LEFT? anybody got a suggestion???????
Clogged Catalytic Converter. What happens is as you push down harder on the accelerator you force more gas into the system causing a slightly richer mixture and more exhaust flow is neccessary. The easiest way to look for a clogged cat is when it's dark out take it for a ride causing it perform it's problem look under the vehicle if the cat is literally glowing red hot you either have a clogged cat or an extremely rich fuel mixture.
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4.0 4x4. at freeway speeds, allrunning fine. then engines shudders and rpms go up. just goes away after awhile. replaced all plugs wires cap distributor coil fuel filter. at low speeds, it will cause engine to die but the injectors continue to fire off as if its running. it will start again after 15 - 20 minutes.
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