MAF Sensor - Upgraded Intake and rough idle for 10 seconds on start
#1
MAF Sensor - Upgraded Intake and rough idle for 10 seconds on start
Ok so I wanted to install a conical style air filter element on the end of my 4.0L SOHC intake tube, but the MAF sensor was molded into the original air box. A guy at O'Reilly auto parts said I can move the MAF sensor and make a hole for it in the intake tube. I did it and made sure it was a tight seal in the rubber intake tubing. I put a cone on the end of it and tightened it down. Now whenever I start it, it runs a bit rough (almost like a slight misfire) for the first 10 seconds and then it calms down to around 800 rpm idle zone. While driving it handles well and only once during my test drive has it bogged down while held in second coming down a hill.
Any ideas? Could this be a problem with the way I installed the MAF sensor? Is air leaking in somewhere? It isn't throwing a code and I have started and stopped the engine about 15 times to see if the idle changes (and it doesn't). I will post this and go take pictures of my work, and then post those...
Original Air Box
Moved MAF sensor from old box to intake tube (rubber) and used black electrical tape to make sure it was sealed during my tests
Engine bay with the new (cheap) intake
But will it work?
Any ideas? Could this be a problem with the way I installed the MAF sensor? Is air leaking in somewhere? It isn't throwing a code and I have started and stopped the engine about 15 times to see if the idle changes (and it doesn't). I will post this and go take pictures of my work, and then post those...
Original Air Box
Moved MAF sensor from old box to intake tube (rubber) and used black electrical tape to make sure it was sealed during my tests
Engine bay with the new (cheap) intake
But will it work?
#2
when you wasted your money on that intake you created a condition that your maf is not calibrated for. Your truck is in open loop during starting, and the ecu is not trimming the fuel, causing it to run too rich or too lean.
my favorite analogy-
I do not unhook my tv and rearrange the wires inside, why? because I don't understand how it works - this is the same reason why you should not modify your truck from how ford built it.
my favorite analogy-
I do not unhook my tv and rearrange the wires inside, why? because I don't understand how it works - this is the same reason why you should not modify your truck from how ford built it.
#3
#5
#8
Ok only thing I am actually still wondering is, if I were to leave it on is there a way to fix it easily and cost (cheap hopefully) or is the only option popping back to the old box and filling my hole in the intake tube. I don't know anything really about cars, which is why I ask all of you for help
#11
#12
Thanks Guys for all the help!
#13
or a volant one which does the same thing.
http://www.summitracing.com/parts/VNT-19140/?rtype=1
Oh and the maf not working with the electrical tape and stuff is because it is programmed to work with a certain diameter tube. Once you alter the tubes size it cannot get an accurate measurement on the air that is passing it.
#14
Already removed the silencer, and removed the entire bottom portion of the intake box, allowing more airflow through my K&N lay-flat performance filter, back to stock it is running good, I think I will probably go with the K&N 57 series intake that comes with the new chrome pipe, fittings, MAF sensor housing, and filter.
Thanks Guys for all the help!
Thanks Guys for all the help!
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