Chrysler Repair: fuel pressure vs map sensor, exhaust leaks, fuel pressure

Question
Hello Roland ,your offer to lend me your DRBII is above and beyond but I will respectfully decline as the local parts store has a scanner which tells me the only code is 33 (AC relay) it is starting to drive 'lurchy' when cold now as soon as i start the car and a quick re-set of the ignition and it drives okay for a few miles. I am leaning away from the open/closed loop scenario and more toward a failing part ,You say it is unlikely to be the fuel pump or coil so I will have to check on a map sensor.How can I check the fuel pressure without a gauge ? The exhaust leaks are at the back

Answer
Hi Paul
I can't think of a way to test the pump for pressure without a gauge, except perhaps to listen for whether it sounds different if the engine is misbehaving during that 1 second activation in the "run" position. My MAP signal read 4.67 in the off position and 1.3-1.5V when idling with the engine hot, for reference as you check that. I wonder whether the "reset" of the ignition might mean you have a flaky ignition switch? You could watch fuse 4, 9, and 13 with a voltmeter to see if any of them are jumping around while you are driving. Those are powered by the three sections of the switch that operate in the "run" position.
Roland