Tough one to figure out. tech gurus???

[PhilC]

Under extremely hard braking (ie coming off back straight at Pocono into the infield) The car is bogging down once back into the throttle and then blowing clouds of smoke (oil) out of the exhaust.

I've read the threads about oil getting forward of the valve covers and then blowing through the air cleaner but that's not the problem in this case as my air cleaners are perfectly clean with no oil evident.

I've got a 99 acr. I had the baffled oil pan, we tried removing the windage doors and the various partitions which did not solve the problem.

Has anybody else experienced this and if so were you ever able to diagnose and remedie the problem.

Could this be a pcv issue? If so, why would hard braking be part of the equation?

Thanks in advance for your assistance.

Phil

 

[GTS Dean]

99's don't have a PCV valve - they use something called orifice control. If you think is ISN'T the oil in the airbox issue, I would invite you to examine the small rectangular filter on the driver's side of the airbox rear. You will probably find it to be soaked with engine oil.

 

[PhilC]

Dean:

Thanks for the reply. I didn't quite understand where to look. Is there an additioanl filter other than the K & N's in the air box I've never noticed. I'd love it if this problem were that easy to fix (just a puke can between the valve cover and the airbox right). I am at work so I cant run out and look this very moment.

Been fighting this one since last August when I got black flagged at Pocono. (It doesn't happen too often, only on the track)

 

[PhilC]

I'll Look tonight when I get home. Thanks again

 

[Hoosier Daddy]

The combined valve cover vents into the air stream just past the air filters on the drivers side.

 

[Larry Macedo]

Sometimes leaving your oil level 1/2 quart low on the dipstick will help the regurge situation as well. Quite a few people in road racing and drag racing utilize puke cans and that would probably be a good idea from what you've described.

 

[Russ M]

I had the same problem on my 99, so I fixed it.

1).Remove the factory breather tubes which go from the Valve covers to the airbox.
2).Cap off the hole on the airbox.
3).Put a K&N breather on the end of the valve cover, 1 on each side.

Problem gone.

Just make sure to put it back on if you need to smog the car.

 

[PhilC]

Thanks everyone for your input. I will be happy (and feel stupid) if it does turn out to be the one thing that I was aware of. If it isn't, I'll be back to try and pick your brains for more ideas.

Phil

 

[Daniel Cragin/DC Performance Inc]

We have a fix for this. I can also give you some advice on how to do it yourself.

 

[Daniel Cragin/DC Performance Inc]

We have a fix for this. I can also give you some advice on how to do it yourself.

 

[GR8_ASP]

Hmmm, Dan do you have a stutter? LOL

 

[PhilC]

Well, unfortunately I'm back fro more help on this one. Took the air cleaners out and they are perfectly clean (both of them). I did notice that the tube coming from the pass side valve cover had come disconnected from the connector where they join and then go to the air cleaner. I dont think this as anything to do with the problem, but I did reconnect it.

Thanks Dan, I'll give you a call right now. Anybody else have any other suggestions?

Thanks,

Phil

 

[Hoosier Daddy]

Well, unfortunately I'm back fro more help on this one. Took the air cleaners out and they are perfectly clean (both of them).

The air filter (two) will not get dirty from the oil. The valve cover vents into the box downstream of the filters! Take off the drivers side tube that connects the airbox to the throttle body. That will be oily.

 

[PhilC]

Hoosier Daddy, you're absolutely right. I was just coming in to post that mine vents into the box behind the filter and that the oil can be getting sucked through the throttle body without ever touching the air filters. Thanks, I'm going back out to chech the smooth tube.

Phil

 

[PhilC]

Thanks everybody, that was definately the problem. Sorry I was operating under the wrong impression that the filters would be the telling tale.

Now I need to get a couple of those breathers I can connect directly to the valve covers.

Phil

 

[vegasviper]

is there a part# for the breathers and name brand?

 

[GR8_ASP]

PhilC you may want to take a borescope and take a peek at your pistons. Heavy oil consumption through the pcv system is the easiest way to get heavy detonation and pre-ignition. If this occurred at WOT it may be worth a look.

 

[Gavin]

I would pass on the breathers - you are just swapping one problem for another potential one.

I will attempt to explain
Your valve covers have a metal plate that sits above the rockers
Viper motor pump a tremndouse amount of oil to the rockers
Under hard braking this oil gets above this plate and the oil takes the easy way out - the breather exit.

In addition to installing a proper puke can, you should look at modifying the metal plate above the rockers to allow oil back down into the motor - this is where the tuners come into it.

Bottom line - half a fix is no fix - do the job properly.

 

[PhilC]

Viper SRT and Gavin. Your points are well taken and I appreciate your help.

Dan Craigen, I left a message for you at your office please call me at your earliest convenience, I would like to speak with you regarding whatever remedies you referenced earlier in this thread.

Office (800) 979-9801 m-f 9-6 est

 

[sbkim]

PhilC or Dan - would you guys mind sharing the fix for this? I am getting ready to install a puke can that acts as an intermediary between the air box and valve vs. a breather unit.