QuestionQUESTION: I'm having a power steering problem with my 2002 Chrysler Concord. The power steering works fine above 1,000 RPM, but doesn't work below that RPM. If you rev the engine or are driving above 1,000 RPM it's fine. I've replaced the power steering pump with a new one, the belt is tight, the fluid level is fine. This is starting to cost me A LOT of money! Help.
ANSWER: Hi Zane,
There is a way of testing the steering system described in the shop manual that would help identify the problem. It requires a test kit and pressure gauge so probably is not worth investing in yourself. A possibility, given that you have replaced the pump, would be that the steering gear is leaking internally which would be assessed by the test. The other possibilities are: too low tire pressures and lack of lubrication in lower control arm ball joints (lubricate if these have fittings), given that you have replaced the pump, have the belt tight to spec, and have correct pump fluid level. So you could start with the two very simple and inexpensive items, and see if either of those is helpful. If you would like the details of the test let me know a postal mailing address and I'll xerox and postal mail you a copy.
Roland
---------- FOLLOW-UP ----------
QUESTION: Thanks for the info, I'll have the pressure checked. Also, could it have anything to do with the SPEED PROPORTIONAL STEERING gear? Sorry, I didn't mention that my car has that. In the factory service manual it references something about a 'Solenoid control valve' that controls the steering sensitivity based on speed or rpm? Please forgive my ignorance - I'm certainly not a mechanic. Thanks!
AnswerHi Zane,
Yes that feature is the possible culprit. The solenoid is mounted on the steering gear and varies the orifice to the gear to vary its assist level. You could check its two wires for patency: pin 1 wire is connected to pin 10 of the gray 13-pin plug at the fuse box under the dash, and pin 2 goes to pin 8 of the same connector. The wire colors are light green/pink and violet/orange, respectively. It may just be that the plug at the solenoid has become disconnected. You will see a cable between the end cap of the gear and the solenoid mounted where the pressure hoses are attached. You may be able to see and remove the plug from above, it is just below the brake fluid reservoir/master cylinder. It may well be that this feature has been disconnected due to a simple unplugging of the wires or damage to the wires. I would check this possibility out before measuring the pressures. It could be a simple fix.
Roland
