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What is the purpose of the Injen intake? is it supposed to allow more air into the heads? If so, the stock fuel/air mapping stored in the PCM/ECU is most likely not be able to adjust the fuel for the extra airflow.
I'd contact its manufacturer and see if it must have a custom tune; most likely it has to get to a dyno, and be tuned.
I would check your EGR valve. I had a similar issue with my 99 F150 5.4 ltre and it was the EGR valve.
There is no EGR on this motor. The cam phasers that do the same job as the EGR.
Originally Posted by Especial86
That video shows a pretty big lag in the speedometer vs the tach.. Maybe you torque converter is slipping too much.. A fluid change certainly won't hurt, or at least a quick check on the color and smell of the fluid..
Before suspecting tranny too much, the tps sensor, and all electrical connections are worth a look. The motor seems to rev clean, if it's rough idling is it doing it in park? Or in gear? Or both?..
Try using the AC and headlights to see if loading the motor smooths out the idle by jumping the RPM's higher.
A tuner does help this "lag" and "low rough idle" problem, because the ford factory tune is designed to appease grandpa, mom, dad but not the son... These trucks are all borderline dogs without at tune..
This is the first AT vehicle I've ever owned. I checked the trans fluid this morning after a 15 mile drive to work and it is the right color and smells fine. It is showing fluid up to the FoMoCo logo on the dipstick so it may be slightly overfilled but you can tell me if that's a major issue or not.
I will say when I'm cruising at 60-65mph and my tach is reading about 1800-2000rpm I get a feeling in the gas pedal that reminds me of a slipping clutch occasionally.
What is the purpose of the Injen intake? is it supposed to allow more air into the heads? If so, the stock fuel/air mapping stored in the PCM/ECU is most likely not be able to adjust the fuel for the extra airflow.
I'd contact its manufacturer and see if it must have a custom tune; most likely it has to get to a dyno, and be tuned.
This is where I was going with my comment earlier, got turned into a "band-aid." There just seems to be post after post about people running an aftermarket intake system, with no change to the tune, who have nothing but issues.
This is where I was going with my comment earlier, got turned into a "band-aid." There just seems to be post after post about people running an aftermarket intake system, with no change to the tune, who have nothing but issues.
And their "issues" will continue.
I recall a few years back where folks were running too lean with an aftermarket CAI on the 5.4's, so an intake manifold has to be even more sensitive in the way of the air to fuel mapping; the stock tune cannot adjust for it apparently.
If it were me, I'd be calling the tech support group that makes/sells this intake, and getting advice in the way of tunning requirements.
I recall a few years back where folks were running too lean with an aftermarket CAI on the 5.4's, so an intake manifold has to be even more sensitive in the way of the air to fuel mapping; the stock tune cannot adjust for it apparently.
If it were me, I'd be calling the tech support group that makes/sells this intake, and getting advice in the way of tunning requirements.
First, there must be a misunderstanding. It's not an intake manifold. It's a CAI (technically not since it doesn't go into the fender well but now we're splitting hairs).
Second, to clear up my band-aid comment. The stalling and idle issues were from the day I bought it before the airbox was replaced. The acceleration was there also, but not as prominent.
I'm not knocking the need for a tuner, as I stated before I plan on getting an Edge Evo HT as soon as I can. I'm simply saying I know that the stock tune is not the main cause of the problems I'm having. If anything it's just adding to the existing problems.
Also here is a quote from Injen's FAQ:
9. Will I need to make engine adjustments to my vehicle after I install an Injen air intake system?
On fuel injected vehicles, the original equipment manufacturer (OEM) computer and emissions control system will usually partially adjust for the increase in air. The OEM computer will adjust immediately if it is reset. Removing the battery cable from the battery for a minimum of 15minutes should reset the computer. Injen Technology offers MegaRam Technology for many of the latest vehicles, MR Technology follows the manufactures air to fuel ratio specifications. In most cases this means no adjustments will be necessary. Many aftermarket kits on the market may require significant adjustments specifically to richen or lean out the system which may require the need to purchase an expensive external electronic management system; this is not the case with Injen products.
Last edited by mmnewcomb; 05-13-2015 at 01:42 PM.
Reason: Adding Information.
It's the size of the MAF environment that MAY change on all CAI's.. If your MAF is suddenly sitting in a bigger tube than it was originally calibrated for, it will not be able to read all the air that's actually passing by it.. Too much air, is lean.. Most tunes will fix the scaling on the MAF and richen up the the burn.. A tow tune on a tuner is richer and can be an appropriate bandage for an uncalibrated MAF..
If the fluid is pink, and not dark your good.. If it is sitting at the do not add line while hot, and in park or neutral that is also good.
The TC could be slipping due to a whole host of transmission related issues. But since you appear to be shifting fine, I would be looking for a sensor connector, pigtail connection, corrosion on terminals, or a bare wire.. Otherwise, your brakes might just be sticking.. Don't worry too much about the tranny itself just yet, check every connector, on the frame, at the tranny and at the TPS and throttle body. For the sake of a quick resolve, I'm hoping you just have a dragging brake that's causing a bit more stall time with your converter..
I am going to change my fuel filter and spark plugs this weekend, so I'll investigate for connector or wire problems while I'm doing that.
The Injen MR technology that's in the intake I have is made specifically to have the same dimension environment for the MAF as stock. If you look at the following photo you can see it actually gets smaller where the sensor is and then gets larger after about a 3 inch section.
My bad for misunderstanding the actual mod that was installed. Since you had the problem of stalling prior to this CAI install, it would not be related.
If I may ask though, why did you install this CAI? There are countless threads here that suggest the opposite, to leave the stock box as is. In reality, it is better than this CAI you show, as the stock arrangement is drawing cooler air from the front of the truck, via the intake tube that enters the fender. With your CAI, you are relying on the seal at the top edges of the filter shield to seal at the hood, which they do not completely, and therefore you draw warm engine and radiator heat into the intake. Cooler air is much better, which is why the factory has it that way.
The manufactures statement that the PCM/ECU can relearn and adjust is valid for most vehicles, but as stated in a previous post, the 5.4 V8 was found to still run lean with them. This has also been discussed to great length on this site over the years.
I know you were not after opinions about the CAI install itself, but everyone here is just trying to help you out. It's been done by many of us before, and found to not be of any functional use; the money can be better spent elsewhere, such as in your case, getting the acceleration, rough idle, and stalling issue corrected.
Last edited by Mod (Ret.); 05-14-2015 at 07:21 AM.
05-13-2015, 06:31 AM
