Airaid TBS and CEL

[kalkan]

Merry Christmas, and Happy New Year, everyone!
Well, I need all y'all's input here: I have a K&N Gen II FIPK, Granatelli MAS, and just installed Airaid's throttle body spacer. It fits, but it messed up my idle rpms. First, it did idle at 1,800-2,000 rpm. After two battery disconnects/computer resets, it's "down" to 1,200-1,300 rpms (versus 800rpm before TBS). And I've had the Check Engine Light lit twice, in two days. When in gear (it's a stick), it's fine (maybe a couple hundred rpms lower) -except the CEL. Any sugestions? Anybody else had the same problem? Why the light? How can I change idle rpms for a '01 Ford 4.0l V6 SOHC? Thanks in advance for your help!
Cris

 

[Jason_25]

Go ahead and take the throttle body spacer out and send it back. It's worthless.

If it still doesn't work after that, take a close look at all the connections in the k&N making sure there are no leaks upstream of the MAF. If it's still running weird, clean the MAF, if that doesn't work, then the MAF may be defective.

You might try and get the trouble code read too.

 

[aldive]

I too have a Granatellui MAF as well as an Airaid TBS on mt SOHC.

I have experienced nione of your difficukties. What was the code the CEL indicated?

When moving the throttle linkage with the TBS, could you have somehow installed it incorrectly?

What are your opinions on the mods?

 

[aldive]

I just remembered having some difficulties with the attaching hardware that came with the TBS and had to modify it. Take a look at the install write up at Dead Link Removed

 

[kalkan]

Hm!

It rained during my break from work today, so all I had time to do was to tighten all the screws, and check all the conections around the K&N/Airaid. As for the CEL codes, I have no ideas. So far, I like the TBS: I feel I have more torque/ better acceleration, same gas mileage. I didn't dyno it, just a "seat-of-the-pants" feeling. I'd like to keep it. On the other hand, was it worth $94+tax? Probably not. I wonder how did the MAF suddenly get dirty, while installing the TBS. Tomorrow, I'll have to find a place to read the codes. Fun!
Thanks, guys

 

[aldive]

Again, I remember a CEL situation when I installed my Granatelli ( old age memory, sorry ). It had to do with IAT and the sensor. Take a look at its write up at Dead Link Removed

 

[kalkan]

Code

Guy at Autozone: code 1506 Iddle Air Control overspeed. Dealer-only part, so off we go...

 

[rocklaurence]

Does the new MAS need calibrated?

 

[kalkan]

Bummed!

Got my truck back from the dealer. They got the same code, replaced the IAC -still get the CEL, and the idle is still messed up! They say that the computer doesn't/can't adjust to the "aftermarket part" (i.e. TB spacer), so they gave up. They didn't charge me for anything, so I can't accuse them of throwing the blame on an aftermarket modification, and not honor the warranty. rocklaurence, I have a Granatelli MAS, so I don't think it can be recalibrated. And for what? I have the same amount of air as before (from the K&N); it doesn't make any sense that a signal from upstream of the spacer to mess the computer. Can I "recalibrate" the computer? Will a Superchip, or Apten chip (see Group Buy, get things right? Any suggestions here, before I take the spacer out? aldive, it seems to be working, more torque & better acceleration; can't check fuel economy, because of the idle mess. HP? I don't care. So, will a chip, probably one custom burned, help?
Thanks for all your input, guys, and have a Happy New Year!
Cris

 

[aldive]

Does your stock MAF have a 4 wire input? How about the Granatelli? My Granatelli had a 2 wire input and the IAT sensor was built into the stock MAF, therefore I had to add an IAT sensor. Check yours......

 

[John_Rock]

I think you probably don't have a good seal between the TBS and throttle body or the tubing in front of it.

To test this try spraying carburetor cleaner around the edges of the TBS. If it changes the idle speed, then you have a bad seal.

 

[aldive]

Originally posted by Johnstone
I think you probably don't have a good seal between the TBS and throttle body or the tubing in front of it.

To test this try spraying carburetor cleaner around the edges of the TBS. If it changes the idle speed, then you have a bad seal.

I was unable to get a good seal using the stock attaching hardware.

 

[kalkan]

Post mortem

All right, everybody: figured it out. Took the truck to 4 Wheel Parts, where I bought the spacer from, we took the whole thing apart, and talked to about three people at Evergreen. Guess what: FoMoCo, in their infinite wisdom, changed the design of the upper intake, starting with model year 02/manufactured from 08/01 on -or so they say! Before, there was a metal plug between the throttle body and upper, separating the primary from the secondary (idle) intake. Around them, there's an oval rubber gasket. "If it ain't broken, let's fix it anyway!" So Ford got rid of the plug, changed to a 8-shaped rubber gasket, and started doing it before the advertised date (my truck has the manufacture date of 6/01). The Airaid spacer is configured for the plug device, and has only the exterior oval rubber gasket. There was nothing separating the intakes, that's why it was revving so hard at idle. Took the spacer off, put everything back on, dis/reconnected the battery, and now it runs smooth, CEL is gone, and 4 Wheel Parts graciously took the product back, and refunded the money. Supposedly, Evergreen is working at a solution...
Anyway, thanks everyone for the input, and all the helpful suggestions.
Cris

 

[John_Rock]

There are Job 1 and Job 2 2001 Sport Tracs. There was a big change in the throttle body assembly between Job 1 and Job 2 models.
I have a Job 1 2001 Sport Trac, and I unintentionally ordered the Airaid TBS for the Job 2 model. I didn't figure this out until I had my throttle body off the truck. But, it was obvious that a Job 2 TBS was not gonna fit on a Job 1 truck. I took the Job 2 TBS back and got the Job 1 model. It fit and works fine without a problem.

Sounds like you had a similar problem.
I'll have to look at my pictures that I took during the two different install periods and compare them to what you described on yours.

 

[kalkan]

Job #s?

Johnstone,
When did Job 1 end, and Job 2 start? For all the Evergreen Airaid guys, it was a model year change, and they didn't have a correct part. Do you remember the part numbers for the 2, since I doubt anyone will be able to sell me the part coresponding to the apropriate Job?

 

[John_Rock]

kalkan,

I searched on www.mysporttrac.com and found the following information:
I found conflicting information for the cutoff date between Job 1 and Job 2's. But, the one that I saw a couple of times was 6/22/2000.
Another person posted this:

The easyest way to determine what job # you have is this:
8th digit of VIN = "X" - Job 1
8th digit of VIN = "E" - Job 2

I don't know how accurate that is.

When I get home I can probably post a picture of my intake manifold cover. That's the biggest visual difference between Job 1 and Job 2 models. I believe the oil filler cap is on opposite sides of the engine too. My Job 1 ST has the oil filler cap on the driver's side valve cover.

Here's the Poweraid TBS part #'s that I dug up:
Job 1 Part # = 400-598
Job 2 Part # = 400-507

Here's a picture I dug up of the Poweraid Part # 400-507 that should fit a Job 2 model and of my Job 1 ST's throttle body. The difference is obvious.

 

[kalkan]

Difference

Yes, and No!
The part number I got was 400-507. 400-598 doesn't fit, because it has the throttle linkage on the right (facing the engine), while mine is on the left. However, check the Airaid in the picture: the gasket goes around the intakes, in an oval shape. My TB has one round gasket completely surrounding the main intake, and an extension going around the secondary. Kind of an 8 shape, so there is a rubber gasket between the intakes. Look at the picture: there's nothing between them, because there used to be a metal plug. That changed, starting with 08/01, according to Ford, but, aparently, earlier. Waiting to see if Airaid people will come up with the new part, with the 8-shape rubber gasket.
Cris

 

[John_Rock]

Yep Kalkan, sounds like you have some version of a Job 2. I guess Ford is never satisfied with their designs and keeps changing them and making the aftermarket people crazy.

For those that don't know how to tell a Job 1 4.0L from a Job 2 4.0L, here's a picture of my Job 1 4.0L with the Intake Manifold cover on it.

 

[John_Rock]

Here's a picture of my Job 1 4.0L with the Intake Manifold cover off so that you can see the throttle body and linkage better. Notice the linkage is on the driver's side.

 

[kalkan]

Job 2 with mods

It's a Job 2, but I have the TB/intake change. The part 400-507 doesn't fit the engines made after 08/01 -according to Ford, but starting earlier, since mine is a 06/01. Oh, well, live and learn!