So I haven't been driving my 93 Crown Vic for about 3 weeks because of the bad bucking and kicking ignition problem and also because of the front end troubles. About 1.5 weeks ago, I bought a cheap 25 dollar IEquus code scanner at the Walmart in town. I hooked the car up to it and ran some tests. I'm getting a EGR sensor voltage lower than expected code, but the big news was the code 211, for Profile Ignition Pickup circuit error. If this circuit fails, the PCM essentially loses track of the position of the cam and crankshaft, therefor losing all spark and fuel delivery. That would explain why I was feeling the bucking. A number of things can cause the PIP failure, ignition module failure, PCM failure, cam or crank sensor failure, wiring short between the IGM and the PCM...Yesterday, I went up to the junkyard and picked an ignition module off another Crown Vic. This module I got at the junkyard is an actual Motorcraft unit, not some unknown aftermarket piece like the faulty one I had was. I installed the junkyard module and started the car then took it for a drive. NO MORE BUCKING!!! Problem solved! The old module obviously must have only been working intermittantly. I drove the car for nearly half an hour (car isn't insured!) and I could only notice a very slight surging in 2nd gear, but this can be explained by my badly worn spark plugs, old plug wires, vacuum leak behind the throttle body or by the EGR sensor problem. I reran the tests 3 times earlier today, and the code 211 does not show up anymore. So now I'm going to put it back on the road once I do the repairs it needs for inspection. Something in the front end, RF coil spring, muffler and 2 front tires. I should do a tranny flush, change the axle lube, change the plugs and wires, change the cam and crank sensor and fix that EGR problem. I should fix the right rear ABS sensor plus recharge the AC too. I'm thinking of using Amsoil for the axle and tranny, and maybe some 15w40 in the engine for the summer months.
Junkyard ignition module fixed my 93 CV's code 211
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