Power Steering Randomnly Goes in/out

[TheJerseydude]

Ive been having this issue with my 94 Q for about a month now. I dont think its the fluid because I check that regularly. Its getting more and more annoying especially when it decudes to stop working right before I paralell park my car. Try parralell parking a 4 thousand lb car with 2 surgically repaired shoulders and no powersteering lol. SUCKS. Plus sometimes when Im on the highway the power steering kicks back in while im going around a bend go 80mph+ which causes it to jerk badly into another lane. Any help with this issue would be appreciated. Thanks in advance because you all have been a great help since I got my Q in 06'.

[Q45dude]

my 94 Q45 has also been doing the same thing for ever. I'm not an expert but reading the forum for so long my suggestion would be:

1. speed sensor in the p/s pump2. p/s pump is going out

good luck

[grunze]

Check out ST-33 of the manual. It may be malfunctioning to fail-safe mode which puts it in high speed assist. Mine needs some muscle when that kicks in at low speeds.

I have flushed the PS with 2 quarts of PS fluid, and a couple of us have now added an ounce or two of Sea Foam Trans Tune(also for PS) to help remove any varnish. It's better but not yet normal.

[Q45tech]

How will Sea Foam remove varnish it does not contain the correct solvents?

Now BG Quick Clean for transmissions or engines does!

Based on volume of fluids about 2 ounces of either in PS and a 15 minute hot up before draining and flushing should remove some varnish.

Always take a few days to experiment chemically with various solvents and detergents on junk yard parts to understand what the requirements for success are

[jcblock]

I have a 97 Q45 and have been fighting a power steering problem for about 9 months. This started with the fluid foaming up and foaming out of the resouver. The steering got very stiff. Through extensive troubleshooting I found a filter in resouver that filtered the return oil before it would supply the pump. I tried first to clean this filter. After that did not work I ordered a new resouver. After I installed that and bleed the air out the power steering is like new.

[Q45tech]

Legal proof that you or previous owner didn't replace the PS fluid every 30k a recommended. The interior of hoses fail from acidic PS fluid and flake off filling filter.

Unfortunately [or otherwise] the 90-96 don't have filters.

In a future machine run world humans will be arrested by robots for abusing machines

[lino]

The previous owner of my car complained about the same problem and the service records indicate the dealer replaced the speed sensor to rectfiy the intermittent loss of p/s, but obviously that wasn't the solution.

I ended up replacing the instrument cluster and it never happened again, but my car is an Active model and the cluster is different than the standard Q45.

[TheJerseydude]

Is it too late to fix the issue? if not what steps should i take?