I decided to try out the descreened MAF/debaffled elbow. I did all of the work the MAF elbow last week in anticipation of doing this. The elbow was a pain in the *** to put back on the car too. On the first startup, everything seemed fine. Went to bed, started the car up the next morning and there was a gurgle in the exhaust note. It seems to go away after driving it for awhile, but what would cause that? Now it does it every time I start up the car. The sound is similar to an 80's muscle car with an opened up exhaust. I have the stock exhaust on the car.

I still have the Needswings CAI and am contemplating re-installing it if this mod is hurting my baby.

The car is at the body shop getting a door ding fixed and I won't have it back until Saturday.

Thoughts?

 

This is the first issue I've heard regarding that... Stupid question, but everything is buttoned up properly, yes?

 

First off, i'd put the Neddwings CAI back on. I can't think off anything that would cause this, except some kind of air or vaccuum leak. This usually causes surges, rough idle, etc. I think this maybe gave about 3-5 HP increse, but the biggest change was the sound of the engine. I remember taking the Air cleaner off so we could hear the carb honk on my old cars as a kid, that is what this sounds like.

I would check at the MAF where the sensor is mounted for a very small vacuum leak. Is is possible that the Elbow body cracked where the the baffles were removed?

Sorry ,no other ideas.

 

Several of us have had issues, max and myself included, when changing items in the TB, intake, elbow, etc and there is only one thing that has cured them all - time. Apparently, even with throttle resets and battery disconnects, this ECU takes a long time to adjust itself to changes...

I don't know if yours will be the same, but if everything was indeed installed correctly and there is no vaccuum leak, I would give it up to a few weeks to correct itself IMHO.

Good luck.

 

+1

Tom, just to be clear, you're not talking about the gurgle sound of the engine decelerating after it warms up are you? I think thats normal.

 

+1 on this, mine was more pronounced with the new TB and descreened MAF + elbow

 

With any auto manufacturer, you'll find that they will put all sorts of random countermeasures in place to delete sounds, farts, and other mechanical chatter. While they were probably aware that the baffles would rob a horse or two from the rear wheels, they knew that they would rather have a whisper-quiet system that could be sold to hundreds of thousands of customers without a complaint of an odd noise.

Take the Nissan Leaf -- the ONLY reason the headlamps look as silly as they do, is to alleviate the wind noise from the mirrors by adjusting the slipstream. With the silence of the electrical motor, the wind noise was simply too pronounced. We went through fifteen mirror designs before we simply raised the headlights -- problem solved. No idea on how much electric horsepower that gained/lost.

 

Thanks guys. When I get the car back on Saturday, I'll do a video and hope the sound comes in clear enough to hear it. The idle is fine, but the acceleration even feels more jerky now than it did before I swapped out intakes. It's weird.

 

No. This (only from what I can hear) happens only after starting the car up after it sits overnight.

When I switched my MB airbox to the NWCAI, there were no weird side effects. The engine fired and idled as normal, without a change in exhaust note at startup. That's what has me concerned after switching it back.

 

Help here plz..... re sentense below...
Please explain what the new TB is ?
What is a DESCREENED MAF +ELBOW ?

Thanks :-)

+1 on this, mine was more pronounced with the new TB and descreened MAF + elbow


QUOTE=TomStratRT;677334]Thanks guys. When I get the car back on Saturday, I'll do a video and hope the sound comes in clear enough to hear it. The idle is fine, but the acceleration even feels more jerky now than it did before I swapped out intakes. It's weird.[/QUOTE]

 

Click on I love nay sayers in my tag line.

 

Mmm that was as helpful as a hole in the head....

Can some one translate the abreviations please, and where these parts are on the vehicle, what i have to to and whats achieved.... im all for a few extra horses at the wheels :-)

 

Hmm could have swore it had pictures too..
MAF
Mustard and Fries .. or mass air flow.. (multiple choice test)
TB
Tablespoon.. or Throttle Body

"new" TB.. as opposed to "old" TB
Not so much referenced as factory fresh but more along the lines of Original EquipMent being a 68 MM bore vrs (new) 74 MM bore

Did you really click on the link and read the thread? What to do and what is achieved couldn't be explained and or debated more. If you did read it.. maybe we should check for a pre existing hole in the head...

 

mmmm yep, pre existing hole in the head is present and correct lol.

I since read the link - excellent thankyou.

still need to know what the elbow is, where the baffles actually are and what is MAF .. Mass Air Flow ???

Again . . . what is chopped off or modified ?



Looked at the wording on the link and it didnt read like it was relavent, as it bore no relavence to the topic... Nay sayers etc lol

 

The "tube" the original engine cover-air filter housing fits over in the back of the engine has a "grid" on the top.Pull the cover and look..its staring back at you...that gets removed.. You are correct on MAF... that "tube" you removed the grill from also connects to a 90 degree elbow..that connects to the Throttle Body. There is a screen in there also.
A cold air kit replaces both those components...which in itself aids in it's efficiency ..

And the link tittle.. LOL.. was more representative of the body of the thread.. 6 pages of no ..no...no.. and 1 page of stepped out and did it anyways and all is good..

 

Since everyone else seems to think this is a cause for humor, I'll take it from here:

The MAF is "Mass Airflow Sensor".

The "TB is "Throttle Body".

The "Elbow" is the bent piece between the two. It has 3 large vanes inside to re-direct airflow. They are large and clunky, so some folks have taken them out. They are attached only on one end.

When they are referring to "New" parts, it usually means "Ugraded" The N/A OEM (Naturally Aspirated, Original Equipment Manufactuer) MAF and TB bore is ~ 68 mm.

The "Upgraded units are generally ~ 74 mm.

Clear as mud, 'eh?

 

Tom,

+1 with Boiler and Witchal. While I found leaks built-in from the factory, the ECU seemed to accept them.
But, when I fixed them, it took quite a while for the ECU to figure it out.

 

Actually the humor was in the relevance of the link.. which he bypassed.

 

All understood. thankyou..
Next question . . . where does a COLD AIR KIT come from ?

Regards to all for assistance here.

GB

 

1. Needswings : NeedsWings Crossfire Naturally Aspirated Cold Air Intake System
2. Make it yourself from various parts easily obtained from the web : pipes, silicon hoses, silicon elbows, clamps, air filters etc. ( See maxcichon's sig for homemade, see my gallery for a Needswings single CAI ) :




NOTE: on a N/A, the dual CAI is a waste of money, stick with the single ( this from Rob himself at Needswings ).