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Re: 1996 jeep laredo is losing pressure and want pick up...
Mikey108 has it. I believe. The inside of your catalytic converter may have collapsed, blocking the exhaust from exiting. This would cause a problem like u describe. The 'air pressure' noise u hear is the exhaust trying to exit a pipe opening that is much too small since it's plugged up now, and it would greatly reduce power of the engine (like u running while trying to exhale thru a straw). Let us know how u make out.
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Attempt to open manually. With the gate open use the remote to close. If the support pistons lose their gas pressure the gate will close automatically but not have the force to open Replace the gas piston on the passenger side.
If something is blocking the sensor will also prohibit the lift gate from opening.
To verify there is a problem, remove the oil pressure sending unit, replace it with a test gauge, start the car, idle, accelerate etc and watch the gauge for any abnormal variations it should react to evry change in acceleration and not be below the minimum or above the max as per the service specs.
Could be the idle air control valve or a dirty throttle body. The computer controls idle speed by how much air enters the throttle body and intake. You would need to check the throttle body and test the control valve.
Fuel filters are cheap and simple to change, so try that first. If that is not your problem it may be your catalytic converter. Before having that replaced, check your fuel return line. You should be able to blow thru the line with your mouth. If you can't, or it's really hard to do. . . then you have blockage. The blockage could be flooding your engine with fuel. Checking the fuel pressure with a gauge from an auto parts store may help you out. If the pressure is really high, then that may be your problem.
its most likely the transmission i have a 96 jeep grand cherokee laredo 12 yrs old ..it went about 3 months ago.i would take off at normall speed and it would rev. to about 3,000 RPMS and then the gear would catch ,and give u wiplash.lol but then it got worse. it would be fine taking off then while i was driving ,,i would be going any speed but wen i got up to speed it would start reving high [the gear was sliping] and i had to get it rebult it was like $3'000 grand plus