Ok guys this is why i truly enjoy FTE.......all this info is what i need unfortunately though as i stated before i am constantly reseting my comp by disconnecting my negative....... and today i tried the cleaning trick but with no success now as for saying the jet chip is junk YUP i couldn't agree more the only thing i can really notice is a smoother shift pattern but i am not sure if it is actually occuring.....but this dang check engine light man whatta joke!!!!!!!!

 

i am suprised no one noticed the dual exaust.... how bout that last set of 02 sensors after the cats? those could cause a lean running and CEL on. make sure allll your o2 sensors are there and connected and workin. pull codes to see what it says too. since its 03 its OBDII i think and would have more o2 sensors than earlier obdI sytems.
Just my .02 cents..... god i hate EFI lol

 

The 02 sensors after the cats (downstream) are there to make sure the cats are working properly. They have nothing to do with engine management or fuel control. These sensors, therefore, cannot trip a lean code.

On the other hand, the 02 sensors before the cats (upstream) are directly involved in engine management and fuel control and are often the source of lean codes.

 

Also...I know when the muffler shop did mine they cut off the old pipes after the last O2 sensor, so I wouldn't lose it.

If anybody in the Dallas area needs a muffler shop, I know Wylie is kinda outta the way, but Rich's Performance Mufflers is great!

Ok *slaps self* back on topic!

RP
Zach

 

its an 04 not an 03 thx though

 

It doesn't matter. An '04 is OBDII as well, have the codes pulled at your local auto parts store. A CEL means codes.

RP
Zach

 

It's comon to throw a cell with a highflow intake, more air, but no additional fuel = cell, lean condition. I'm not saying that could be the only cause, but my experience with intakes tells me it probobly is. Truck computers are far less forgiving, than lets say, a mustang, or even my focus. Ford intesapates people screwing with street performers to a degree. A ford spokesmen recently said, the reason there isn't a new svt focus, is because the aftermarket for the focus is such, that people can design thier own style, and performance into the car. With the price of a focus, you can have a 250-300 hp car, and still be cheaper than the competeters performance cars. Trucks are different, most folks use them for work, hauling, towing, and such. Not trying to get off subject, but I still think there is a good chance your computer isn't compensating for your mods. Contact Doug at bama chips, he's a good guy, you don't have to buy anything from him, just tell him your problem, he loves to give advice, he knows fords, and especally the ranger. Let him know every mod, and change you've done to the truck, so he can better help you solve the problem. I'm sure it's an easy fix, with just a proper tune.

 

With intake & air filter mods, there isn't an increase in the volume of air flowing, but these mods cause the MAF to improperly measure the volume of
air flowing, which causes a lean condition (MAF sensor thinks less air is flowing, which cuts back on fuel). I echanged e-mails with Doug, and he said this is especially true with the new design of MAF sensor that
Ford is now using.

 

Bob, did Doug say a proper program would fix it, I assume, or did he have anyother solutions? I wish Doug was around when I had my f-150, instead of using that jet crap, I paid almost 300.00 for the jet chip, and another 300.00 for a lame machanic to install a fuel presure regulator (still don't know what that did) and mess with the programing. It got rid of the cell, and ran pretty good, but not near as impresive as my ranger with the bama, "now thats a programer"!!

 

Now I have sent an email to your friend at bama and am waiting for a response I paid a bit over 300 cdn for this jet rip off and am waiting for a response i do beleive the fellow will have a sale if it corrects my problems and improves my ride!!!!!!!!

 

Wendell, Doug just said that changes to the intake and/or air filter would cause problems with the new MAF sensors....

 

10-4 Bob, I thought he might have rattled on about his programer taking care of it, I know it will, I just wondered if he went into a little more detail.

 

If the MAF sensor doesn't sense the correct air flow, then it would be impossible to adjust the tables to run correctly.....

 

That can't be , cause to many of us are running intakes on newer rangers with bama tunners, and no cell. Don't beat me, but I ended up buying a k&n 57 series intake, cause AEM was to slow in developing one, At any rate I told Doug that I had a gutted air box, but was going to get a intake, he said he would tune for it. I have had no problems before, or after the intake with the bama. I am putting on a AEM filter. Over at rps, intakes are a common mod, and no one has reported any problems after bama. Before 04, there are after market maf's available, or people have swapped mafs from a mustang, or a crown vic, that maybe part of the solultion. But after 04, the maf on the 4.0 is intergrated into the airbox, thats why intakes are slow in comming out. Never mind Bob, your right again. I just answered my own question. The new k&n intake has a maf built into it, so it does have an upgraded maf allready in it, so the bama had nothing to do with that aspect. Well then maybe this guy just needs to upgrade his maf? At anyrate I would still chuck the jet and get the bama, it's a shame to spend money on upgrades, and not get the full benifit because of a generic tune.

 

Wendell, check out these URLs. They might be useful to you in explaining how the MAF sensor works, and the complexity of the entire intake "system". There is also a good explanation on a tuner, which might work better for you instead of a "chip":

http://para.noid.org/~lj/PCM%20Tutorial/PCMtutorial.htm

http://fordfuelinjection.com/files/EECTuner_FAQ.pdf

http://www.allfordmustangs.com/Detailed/583.shtml