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Stepper motor noisey under pressure - Varian Prostar 210 Hplc Pump

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2 Answers

Speedometer doesn't work


You might try an oil pressure sending unit, first making sure the connector and harness are okay. I'm not sure, but I think there is a VSS Sensor as well, or vehicle speed sensor. Check the connector and wiring. If its okay, try a sensor. Good luck, hope this helps.

Sep 15, 2014 | 1998 GMC Sierra

1 Answer

No oil pressure on my 2009 Yukon


You need to be careful here. If you are driving your Vehicle with ZERO PRESSURE, you are going to blow up your engine.

There is also one of 2 other scenero's for a GM Vehicle

FIRST: Instrument Cluster STEPPER MOTORS are KNOWN to be going BAD in GM's/. If the Stepper Motor is bad, make sure you replace it with a X27.168

SECOND. Your Sending Unit could have come unplugged or the Unit itself went bad.

I am Betting that your Stepper Motor went bad (Happens that Frequently).

I would put a Gauge on the Motor and see what the Oil Pressure Actually is, if it is Truly ZERO... do not start or Drive the vehicle and take it to a Good Mechanic or if still under warranty.. To the DEALER

Apr 08, 2013 | 2009 GMC Yukon XL

3 Answers

I replaced the oil pump and rod and main bearings and i still have somewhat low oil pressure


How do you know that you have Low Oil Pressure?

Are you trusting the Gauge or putting an In-Line Gauge?

YOUR GM GAUGE CLUSTER is known to have BAD or DEFECTIVE STEPPER MOTORS...

If you put the In-line Gauge on and see that you have Good Pressure, then what you need to do is rebuild your Instrument Cluster.

MAKE SURE YOU USE X27.168 Stepper Motors... The Cheaper CHINEESE STEPPER MOTORS are black and are defective.

The X27.168 Stepper Motors are WHITE and will last for as long as you own the Truck.

Order 6 Stepper Motors and do them ALL at the same time or you can pay someone $95-$200 to rebuild it for you...


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Apr 06, 2013 | 2004 Chevrolet Silverado

1 Answer

Oil pressure gauge is ready zero in 2003 2500hd 8.1 liter


Hello, this problem is due to a failing stepper motor. The stepper motor is the motor behind the gauge that controls the movement of the needle. When a stepper motor begins to go out it will cause the gauge needle to stick, skip around, stay at zero or max out on the gauge. The only way to fix the problem is to replace the stepper motor with a new one. While replacing one motor it is best to go ahead and replace them all as the others will go out in time as well. Your cluster will have one motor for each gauge. Here's a link to a page showing exactly how to replace a GM stepper motor and where to get the correct parts to do the job! DIY Finally How To Repair GM Instrument Cluster At Home Speedometer And...

May 21, 2012 | Chevrolet Suburban 1500 Cars & Trucks

1 Answer

Oil pressure gauge drops to zero and comes back up to 80


Hello, this problem is due to a failing stepper motor. The stepper motor is the motor behind the gauge that controls the
movement of the needle. When a stepper motor begins to go out it will cause the gauge needle to stick, skip around, stay
at zero or max out on the gauge. The only way to fix the problem is to replace the stepper motor with a new one. While
replacing one motor it is best to go ahead and replace them all as the others will go out in time as well. Youre cluster
will have one motor for each gauge. Here's a link to a page showing exactly how to replace a GM stepper motor and where
to get the correct parts to do the job!
DIY Finally How To Repair GM Instrument Cluster At Home Speedometer And...

Feb 25, 2012 | 2006 Chevrolet Silverado 1500 2WD

1 Answer

The check gages light comes on and off while driving, at the same time, the oil pressure gage drops and then bounces back up after hitting zero


There a couple of possibilities; you could have an intermittent oil pressure switch or an intermittent stepper motor in the instrument cluster. The stepper motor drives the gauge.

Jun 30, 2011 | 2003 Chevrolet TrailBlazer

1 Answer

Fuel gauge dont work i put a new fuel pump in it and it still do'nt work 1997 blazer


Was the wire harness replaced from the fuel sending unit to the frame, it's a good practice to replace the wire harness when the sending unit is replaced. The wires are know to break and cause sending unit issues from weak fuel pressure to faulty gas gauges.
The other possibility would be a faulty connection to the stepper motor in the gauge it self or just a faulty stepper motor that would need to be replaced. You can do a search on Ebay for stepper motors for your fuel gauge which runs for around $15.00 which is much better then $400.00 for a new cluster if it is and bad fuel gauge stepper motor.
Thank you for using fixya and good luck.

Apr 18, 2010 | 1997 Chevrolet Blazer

1 Answer

1999 cadillac deville speedometer is not working. All other gauges are working.


Most likely your Instrument Cluster contains Electronic "Stepper Motors" on all Needle Indicators. If this is the case, you should consult the Factory Website to detrermine if this is the case. I have replaced many in my 2004 Chevrolet Silverado which has 6 Stepper Motors. These typically exhibit erratic indications prior to total failure. The first to go was the Speedometer followed by Oil Pressure and eventually Temperature, Voltmeter and Tachometer. Obviously your vehicle is no longer covered under warranty. I strongly suggest that you find a Speedometer repair facility and have it checked professionally.

FastestRobe

Nov 19, 2009 | 1999 Cadillac DeVille

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