Rear suspension & s/c question

[01ssei]

So I have a 01 ssei and the whole car shakes from 60-70 mph seems to have bad rear shocks and at wot it only seems to get to zero psi.. And the oil pressure is at 120 but I assume thats a sensor please help with what ever u can thank you

[Ken_W]

So I have a 01 ssei and the whole car shakes from 60-70 mph

Refer to Common Problems list at the top of this section. A lot of our Bonnevilles have this.

seems to have bad rear shocks

Can you elaborate please? What is happening that makes you think the shocks are bad?

and at wot it only seems to get to zero psi..

I don't know about this one. Hopefully another member will help with this one.

And the oil pressure is at 120 but I assume thats a sensor please help with what ever u can thank you

Very easy to fix with new $40 sensor (get AC Delco). See Common Problems list for solution.


Ken_W

[01ssei]

When you jounce the rear of the car out takes achiote bounces before it settles

[01ssei]

And was curious about if the shocks being blown could this be the cause of the vibration cuz I had my tires road forced and balanced but, my main concern is this no boost crisis

[Ken_W]

The rear shocks are not causing your 60-70mph shimmy. That is caused by something in the front end.

[Archon]

Check all of your vacuum lines for a leak. Pay special attention to the "T" that connects to the LIM under the supercharger snout. That could cause your low boost.

[00Beast]

Also the blower control solenoid, the small black box below the round can bolted to the blower, disconnect the electrical connector from it and see if it fixes your problem. If it does, the BCS is your problem.

[mende21]

... And the oil pressure is at 120 but I assume thats a sensor...

Or possibly the gauge itself. Half of my gauges were all over the place until I replaced all the stepper motors.

[00Beast]

Much more likely that the sensor is bad. That's much cheaper/easier, and should be tried first. A pegged gauge is almost always the sending unit. A gauge stuck on 0 or in a funky spot or that jumps around much more often could/would be the stepper motor in the cluster.

[01ssei]

Do I un plugged the connector to the black box under the wastegate? And still no boost I can't really hear the sc whine at all could the charger be dead

[00Beast]

Yes, what you are calling the waste gate is the boost control actuator, the round thing, the boost control solenoid is the black box with the vacuum line and wires coming out of it.

Your supercharger could not be dead. With a stock airbox you won't hear whine really. Unless you destroyed your coupler (extremely loud clattering would be apparent) or your belt came off, you could not have a "dead" charger.

More info here, about half-way down: http://www.3800supercharger.net/diagnosing.html

[01ssei]

I can hear a clattering but its only on occasions and it sounds like a heat shield though

[00Beast]

A bad coupler would clunk at idle, but wouldn't give you no boost. It would literally have to disintegrate.

[01ssei]

Ok I'm still larkin this while super charger thing I can r&r a turbo set up any day but this is different so I should check for a boost leak around the hoses by the sc? And check the bcs with a dvom?

[Z-type]

I'd say the solenoid is probably the problem, but another possibility is the bypass valve inside the supercharger being stuck too. A rare problem, but it happened to me when I first got my '00 SSEi. There was so much carbon buildup the valve simply wouldn't allow more than 1 PSI at WOT. Cleaned it, lubed it, all is well to this day.

Check the solenoid first though. You can check the valve for function by moving the lever attached to the boost actuator. Should move fairly easily with your finger.