Hi all just wondering if anyone on here has dealt with van vacuum problems no cruise power brakes work random chugging took it to autozone for scan and was told vacuum leak. Any input would be appreciated.

 

Gonna have to pull the doghouse, and start looking around. Usually, the vacuum booster (brakes) has it's own dedicated line....... Vacuum assist being intermittent really isn't a good sign.

 

I think the cruise is a clockspring issue now air bag light is on and only one horn working. The breaks always work guessing maybe evap problem hopefully just a bad vacuum hose will get after it tomorrow.

 

If you don't find any bad hoses or breaks, be aware that the underside of the intake has a gasketed plate that can cause an unseen vacuum leak.

 

OK scanned van again and came up with 4 codes 1. PO455 EVAP Large Leak Detected 2. PO0132 O2 Circuit High Voltage Bank 1 Sensor 1 3. P1763 Governor pressure sensor voltage to high 4. P0442 Evaporative Emission System Leak Detected (small leak). would the leaks cause the other faults? Has anyone had these before, any ideas on where these leaks happen?
Thanks again.

 

Nope, you have a couple different problems there. The EVAP leaks are likely just rotted hoses. They run under the van, so are exposed to the worst nastiness driving can manage. You will need to inspect them all, end to end. If they feel dry, or they are starting to crack, replace them. (it's just vacuum line after all.) Deal with the large leak first, see if the small leak code goes away.

Plug in your scanner, and see if you can see just what voltage the O2 sensor is reporting. Typical failure mode is to short internally, and replacement solves the issue.

Governor pressure sensor is on the same five volt feed as the O2 sensors, so, think I would address the O2 sensor issue first, clear codes, and see if the pressure sensor code stays gone.