Excessive oil in throttle body and intake - please help

venom1307

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Hey guys I need your help/expertise. My 04 cobra has 28,000 mile on it. I had an accident a while back and it sat for years inside the body shop. The guys who owned the shop died and it was Legal battle to get my car back, which I won.

Any way, I got the car back last august and have been working over the last 9 months. Today was that exciting day where I was finally ready to start her up. Thought my BAP was acting up so I bypassed it and put the car back to stock. We tried to start it maybe 8-10 times waiting in between to not overheat the starter or be too hard on the ole girl. Figure out it was the stock MAF by unplugging it, and she fired right up, idled for a few seconds and shut it off.

Later I pulled the JLT intake and there was a little dark drown/black oil in front of the blade. I wiped it up and then hit the throttle blade to look inside and clean the edge of the blade when holy Shiz there was a large puddle that came running out. I grabbed a rag before it poured on to the valve cover.

The intake is a brand new JLT Hi boost & I had just pulled the throttle body and the elbow off to hit them with my bench polisher inside and out, there were some surface pits in the aluminum from sitting, so I know how clean it was inside. Throttle body is an Accufab big single blade which was just cleaned & pristine before reinstalling it. There was no prior evidence of excess oil anywhere in the past not even from the stock PCV setup. She has only ever had a tiny bit of normal vapor from the PCV that never needed cleaning up.

The car sat for 6 years before I got it back. It was inside a heated and air conditioned shop all that time while we battled out the legal stuff.

The car only ran today for a few seconds. I had just installed a new fuel filter and pressure sensors so I expected to have a few tries to get the air out. I did get it started after unplugging the MAF, so I know that was the issue then she ran totally fine. Idled for 10 seconds and I shut it down. Later I found the oil when putting the intake back on.

I am freaking out something is really wrong from it sitting. The oil in the throttle body was super dark almost brown/black. All fluids in the entire car are brand new. Where this gross dark oil came from, I have no idea.

What we have checked:
- The PCV tubes on both sides are dry.
- The blower is full and the oil is pristine in it. I had changed it not long before it was parked.
- engine oil is fresh AmsOil, just put it in
- oil filter was not excessively pre filled.
- put a scope down each cylinder and pistons look fine. Little dirty but no pieces missing.

Couple notes:
Since it sat so long, I did spray a very small amount of Marvels Mystery Oil into each cylinder and let it sit for a week before starting it. I didn’t want to risk any thing being stuck like a piston ring, dry cylinder walls, etc. however, this was a small controlled amount through a spray head we made to up to create a fine mist, just to moisten things as a precaution. Again, a very small amount just to pre lube the top of the pistons and rings from sitting. I scoped each bore as I lubed them to ensure it was barely damp in each cylinder as I went.

We also made up an engine pre-luber with a pump sprayer we tapped an air fitting into and pumped a full 6 quarts of fresh oil into. We used the extra port by the oil temp sensor to pre lube the entire top end. We could hear it trickling down into the oil passages and into the pan nicely.

The car did sit with what ever coolant was in the block due to the radiator being taken out from the accident.
The entire block was flushed with hot water that was 135 degrees Fahrenheit for 3 hours. The water was exchanged in 20 min intervals so it could soak to clean the block and coolant passages. I wanted to get all traces of ford gold out and happy to report no gunk, rust, or chunks. When we filled the system we used a vacuum coolant setup. We vacuumed it down and let it sit for 1 hour the gauge never moved so I know there are zero leaks in those areas.

I know we went a little overboard to make sure she was in the best possible condition as we repaired her, cleaning and flushing every system to ensure it was pristine. I do change fluids early and always do full flush and fills every other year in all systems.

Tomorrow we are planning on doing a compression test and leak down but wanted to get your thoughts. Why would there be so much oil after only running for a few seconds and maybe 8-10 start stalls from the bad MAF?

As we wrapped for the day, we started it one last time let it idle for a few seconds with the MAF disconnected and pass side valve cover tube disconnected then shut it down. We then waited, checked the throttle body and didn’t find any oil like before, there was tiny spot but I think it was just residual. I put my scope in the blower and it’s super clean in there nothing looked coated or dirty.

My dad is finishing the car for me since I recently moved across the country to Scottsdale AZ. He is hoping to ship the car out soon so I can get it Dyno tuned with the new mods and 2.76 pulley (had a 2.91 previously). But this oil today was a real concern and we don’t want to ship it if he is going to have to tear into it again. Sucks since it’s been many months in the making. Hope it’s just some residual from something and a fluke but it doesn’t feel that way :(


Look forward to your thoughts.

P.s. Anyone know a really good tuner in the Scottsdale / Phoenix area.

Someone recommended Cordes Tuning, feedback welcome.

Forgive my typos wrote this on my phone.

Night all ! Thanks again.
 
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03cobra#2

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Honestly I would check the oil level, make sure it's good, try cleaning or replace the maf so It runs correctly with the maf plugged in and start it up, let it get to operating temp, check for leaks.
 

derklug

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For all you know, the body shop could have ran some oil into the cylinders if they knew it was going to sit for awhile. If the compression test comes back good I would just get it started and let it run for a while then recheck everything.
 

03' White Snake

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Oil in TB is from the PCV system and boost. If you were to pull the blower and intercooler your intercooler would be covered in oil. Use brake cleaner to clean it. Just idling will not produce the oil, it happens from boost.

You should add an oil separator or catch can.

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DSG2003Mach1

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Happen to have a picture of where you pumped the oil in?
Should be right there at the oil filter. I know my car had a spare port with an NPT plug or just back out the single wire oil pressure sender.

Remember NPT is tapered, I’d you over tighten you’ll crack the housing, ask me how I know…
 

Blkkbgt

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If the oil you found is dark and black it has to be old. New oil doesn't get black in one start up.

Also if the oil level is still where you serviced it to thats another sign its old.

Now where it came from I am not sure. The only think I can think of is it was sitting in the blower some how and rolled out after your shut the car off.

At this point I'd scope the lower manifold and see how much oil is below the intercooler.
 

venom1307

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Oil in TB is from the PCV system and boost. If you were to pull the blower and intercooler your intercooler would be covered in oil. Use brake cleaner to clean it. Just idling will not produce the oil, it happens from boost.

You should add an oil separator or catch can.

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Thank you I think this is what is happening the oil collected from sitting and I sucked it up at startup.

We did get it running today with good MAF and it ran and no more oil at all. I guess it was just residual that pooled and the lower pcv tube sucked it up.
 

venom1307

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If the oil you found is dark and black it has to be old. New oil doesn't get black in one start up.

Also if the oil level is still where you serviced it to thats another sign its old.

Now where it came from I am not sure. The only think I can think of is it was sitting in the blower some how and rolled out after your shut the car off.

At this point I'd scope the lower manifold and see how much oil is below the intercooler.
This is a good point. Thank you. Makes sense. Will check and report back
 

NightRide

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Who do you guys like for the catch can setup ? I want to collect as much of this as possible to keep her clean?
Most use jlt like I have, upr had a great setup for my s550 not sure what they have for the Cobra. In reference to tuning Cordes is good but mainly a vette/camaro shop last I heard. I would make the trip to Dyno edge in Albuquerque. I've also hear good things from aed In Cali whichever is closer.
 

venom1307

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Happen to have a picture of where you pumped the oil in?

Found a pic for you. There is another port next to the oil temp sensor. Threaded into this port and pumped my oil using a heavy duty pump sprayer. You can do it by hand but you can also tap an air fitting into it if you want to make it a bit easier. A cheap DIY solution and it works. You can get a one way NPT fitting if you want to leave it in there or just thread the stock plug back on. Make sure to be ready with the stock plug, once you remove the pre luber fitting so you don’t make a mess.
 

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venom1307

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Most use jlt like I have, upr had a great setup for my s550 not sure what they have for the Cobra. In reference to tuning Cordes is good but mainly a vette/camaro shop last I heard. I would make the trip to Dyno edge in Albuquerque. I've also hear good things from aed In Cali whichever is closer.
I wouldn't want to drive it that far without it tuned. I do have an SCT and a Diablo Predator I could use one of those pulley tunes to get me to a shop and just baby it for the ride.

Couple places around here that friends told me about are

Godspeed Performance
Dyno Comp
Snail Performance AZ
Modern performance and tuning
Xact Dyno

Thoughts?
 

venom1307

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I only have experience with the JLT/J&L OSC catch can. I like it a lot. Well made kit. Easy to install. Easy to check and empty as needed.
jl-osc-catch-cans.jpg
Thanks, I was just looking at these over the weekend. What do you guys thing of the ADD W1 V3 with the triple twist baffle system ? I was talking to them yesterday and they are working on a lot price for me to do one on each side that will still function like the stock setup does, only it will remove the oil from the lines before they go back into the motor.

Reviews online have been solid and they seem to catch a lot of oil.
 

CobraBob

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I checked my JLT/J&L OSC catch can this morning at approx. 1,500 miles) and there was about a tablespoon of oil in the can. About what I expected.
 

Bdubbs

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The bigger the separator, the more oil you generally can capture in it. I never had much luck with the JLT and went with a Elite. They don't make a specific one for our cars but I made it work..
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CobraBob

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The bigger the separator, the more oil you generally can capture in it. I never had much luck with the JLT and went with a Elite. They don't make a specific one for our cars but I made it work..
4e960670439e4c70e4008a13f4c082d1.jpg


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I'm not understanding the logic there, Brady. What has the size of the canister got to do with capturing more oil unless a smaller canister fills to capacity? I don't see any way that installing a larger canister on my G70 would have collected more oil than the tablespoon I found on Friday. Please explain.

Also, what specific issue did you have with the JLT oil separator?
 

Bdubbs

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I'm not understanding the logic there, Brady. What has the size of the canister got to do with capturing more oil unless a smaller canister fills to capacity? I don't see any way that installing a larger canister on my G70 would have collected more oil than the tablespoon I found on Friday. Please explain.

Also, what specific issue did you have with the JLT oil separator?
This has been a topic for years. It's nothing new. A larger capacity oil separator/ longer lines will collect more oil. It gives it a chance to drop "down" instead of just passing through.

I've run the air compressor separators and JLT. Both collected very little compared to what I'm running now.

This has been a topic on here for years.

Edit: you ever notice that with your current separator will only get so full and then stop? Test this out and you'll have your answer. Also location is important...

Edit x2: BTW my 350 has JLT separators on it. But I bought the car with them on. Usually a forced induction car will have more blow by than NA cars.

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