MYSTERY SOUND

1991 Pontiac Transport

Tiny

56jiliz

March, 17, 2011 AT 2:28 AM

1991 Pontiac transport minivan - after shutting off the van a motor running sound begins coming from the rear driver's side. It runs for several minutes and then shuts off.

FOUND 16362 RELATED QUESTIONS

Wiring Issue?

68 ANSWERS
134 IMAGES

8 Answers

Tiny

PROTECH1980

March, 17, 2011 AT 2:40 AM

Can you get under there and pinpoint the noise.

Tiny

56jiliz

March, 17, 2011 AT 3:01 AM

Looks like it is coming from something under the van at the point where you put in the gas.

Tiny

PROTECH1980

March, 17, 2011 AT 3:18 AM

Could it be coming from your tank? As in your fuel pump buzzing or humming? Pump will run for a few seconds after you shut the vehicle down.

Tiny

56jiliz

March, 17, 2011 AT 3:23 AM

The noise begins about 10-15 seconds after I shut off the van. Sounds like a generator beginning to run.

Tiny

PROTECH1980

March, 17, 2011 AT 3:29 AM

Does the vehicle have air shocks in the rear, possibly a compressor running? Maybe the van was modified for handicap accesibility and was equiped with air shocks.

Tiny

PROTECH1980

March, 17, 2011 AT 3:31 AM

How long does the sound last?

Tiny

56jiliz

March, 17, 2011 AT 4:02 AM

I don't know if it has air shocks. This just started happening about a month ago. It runs for about 5-10 minutes then stops. Another post asked if the van had a self-leveling suspension and this is the compressor runnng until the air pressure is boosted to the point that levels the van. Said to check for leaks in the hoses to the rear shocks. This sounds like what you are asking also. I'm obviously not fixing this myself. Just hoping it isn't a major thing and wondering whether to ask the mechanic or go to the electrical repair shop.

Tiny

PROTECH1980

March, 17, 2011 AT 9:04 PM

Yes, more than likely it is the compressor running overtime, it is normal to run for say, 5-15 seconds but 5 minutes is way too long, have it checked out for possible leaks, bad shocks, level sensor etc.

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