P1128/p1130

[Jager]

Originally Posted by ramo80

Thanks Jager

I just tested it. when I wrestle the cap off i wouldn't say the rpm goes down but the car sputters and runs rough until i put it back on.

Bad AOS?

If the AOS is good the RPMs will actually increase but the motor will shutter a bit. A bad AOS the RPMs will drop, the motor stumbles and sometimes stalls. While the motor is running and you take the oil fill cap off does it sound like a shop vac at the opening? Put your hand over the oil fill opening, is there allot of vacuum (like a shop vac) grabbing your hand?

[ramo80]

Checked again. there is no change in RPM. Stays a hair over 800 or right at 800. car sputters when cap is removed. I put my hand over it and it left a mark. it did feel like a shop vac. Its was on there good.

[Jager]

Originally Posted by ramo80

Checked again. there is no change in RPM. Stays a hair over 800 or right at 800. car sputters when cap is removed. I put my hand over it and it left a mark. it did feel like a shop vac. Its was on there good.

If there is that much vacuum the AOS is bad.

[Jager]

Originally Posted by ramo80

Checked again. there is no change in RPM. Stays a hair over 800 or right at 800. car sputters when cap is removed. I put my hand over it and it left a mark. it did feel like a shop vac. Its was on there good.

Have you ever had a large cloud of smoke on start-up?

[ramo80]

Nothing out of the ordinary with respect to smoke. I probably should have started with this but the car has 145,000 kms. I have owned it since it had 50,000 km and i have never replaced the AOS. I don't know if the previous owner did. Here is what i found about the symptoms of a fail AOS on pelican parts

"The failure of the air-oil separator is often (but not always) accompanied by huge amounts of white smoke exiting the vehicle's exhaust and a generally poor running engine."

[Jager]

That much vacuum (shop vac) tells me the AOS is bad, it's a common problem with the M96 motors. You have been fortunate to go that many km without replacing the AOS. If you decide to replace it are you going to do it yourself or take it to a shop to have done?

[ramo80]

i very rarely take my car to a mechanic. I love DIY projects. I'll order up all the parts as described in pelican parts and tackle this when they get here.

[Jager]

I recommend this tool (or similar) to remove and install the lower hose clamp.

Craftsman Cable Operated Hose Clamp Pliers - Tools - Mechanics & Auto Tools - Automotive Specialty Tools