Doesn't it mean that the system has an air leak of sorts if the compressor runs for 90 seconds and shuts off?
Like Unity said...if your relay was bad, the compressor wouldn't run at all.
Like I said above, when Sunday rolls around, jack the front of the car up so its level with the rear, this will most likely "seal" the cracks in the bags, keeping the weight of the car off of them, and the compressor will pump it up and level it out.
Also, while you have it up, look at the bags, I bet you'll be able to see the cracks as the bags "roll" up when you're lifting it with the jack.
Like Unity said...if your relay was bad, the compressor wouldn't run at all.
Like I said above, when Sunday rolls around, jack the front of the car up so its level with the rear, this will most likely "seal" the cracks in the bags, keeping the weight of the car off of them, and the compressor will pump it up and level it out.
Also, while you have it up, look at the bags, I bet you'll be able to see the cracks as the bags "roll" up when you're lifting it with the jack.