[wildthing4870]

I have a 1991 LX. I want to buy an air filter for it i saw on ebay. I took a look at mine and noticed the sensors in it. I pulled them off and started the car, it sounded horrible, it sounded as if it were about to die. i plugged the sensors back in and the engine sounded good. Can i bypass them somehow to install the new one or what should I do??? I don´t want my car running like crap with a brand new filter so how do i install the filter without the sensors and still have my car run good?

 

[James92Scort]

simple answer. you can´t. you need those sensors. it´s either a MAF (Mass Air Flow) or VAF (V*something* Air Flow) sensor...it meters the air coming into the engine so the ECU knows how much fuel to mix in with it. Without it you´d start to run either too rich or too lean which isn´t good for your car either way

You CAN install a filter in place of your stock filter but you´d still need your sensors.

 

[wildthing4870]

Kool, but do I have to buy a tube with sensors on it or can i rip that one off the stock contraption and bolt it to the frame somehow? All i am gonna buy is the cone and the adapter, but the adapter is a steel ring it appears to be. No sensors??? Let me take a look and see if i can take the sensors off.

 

[siragan]

James is correct, and in addition, you also need to mind these things too...

the valve cover breather (can be replaced with a little mushroom looking filter thing)

the IAT sensor that measures the temperature of the incoming.

All of them are pretty easy to mod into the aftermarket system. To install the IAT sensor, just drill a hole, stick it in, and silicone around the edges to make it airtight, and then to adapt a cone filter, you just need that steel ring adapter like you said.

And btw I have a 95LX.. may be different on the 91 I dunno.

 

[wildthing4870]

what is the IAT sensor and where is it? Ya i know what the valve breather is, its that filter that attches to the manifold right? i saw one for 6$ and was thinkin about getting it. Explain where the IAT sensor is and how to remove it and reinstall it? I dont get you, the only sensors i saw is the very top one, and one in the bottom of the airbox.

 

[James92Scort]

I think my next semi-cheap mod will be a cone intake. All I need is a MAF adaptor plate to make it fit right?

I´ve already taken everything off my intake possible (silencer and under filter restrictor tube). My engine screams now...all I need to do is get a filter on there that breathes better. ;-)

 

[siragan]

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04-04-2003 at 22:47, James92Scort wrote:
I´ve already taken everything off my intake possible (silencer and under filter restrictor tube).

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If you´re talking about the resonator box, according to jason blade it adds 5ft-lbs of torque. I´m not sure how... but it´s best to leave it on.

To be honest with you, I didn´t notice a difference in power when I switched to a K&N fipk cone filter with an RX-7 VAF. I did notice that my top end roxxored... the power band got much wider and I can still get power above 5400rpm, which is where it tended to choke with the stock setup.

 

[James92Scort]

I´m talking about that air silencer box on top of the radiator. that´s gone.
Then there´s a tube that comes from the bottom of the air intake box that goes down, bends 180 degrees and turns to the front behind the turn signal. I took that tube out too. if it adds power then why is it best to leave it on? :-?

 

[siragan]

you;re talking about the resonator duct (runs along the top of the rad) and the ford version of a CAI. It looks like a saxaphone (sp).

Yeah taking those things out is probably a good way to get better throttle response for free.

and I´m talking about the resonator BOX, not the duct. The box is a black box that is on the TB side of the VAF.

 

[James92Scort]

Ok I know what you´re talking about. That´s still in place. I only took out the restrictors that are on the unfiltered sides of the filter box.

 

[91scortgtboy]

Now what I did to my GT was drilled through the metal ring on the cone and the metal part where the air box used to be on the stock intake and bolted them together. Works great and no adapter was needed.

 

[James92Scort]

I think I´m seeing what you did...I´ll prolly try that eventually. There´s way too much crap I wanna do to my car and i have no money! heh

 

[gasper44]

You can also do just what I did which is order the MAF adapter plate from ZXTuner (the one WITH the threaded hole to put your sensor in) and not the crappy MAF plate from ebay and just put a cone and breather filter on there. 18 bucks for the adapter from zxtuner.com and about 30 for the cone and breather filters.

 

[Escort_KXT]

This is probably not the easiest way to do it but I used a Dremel to cut the mounting plate around the MAF on my 94 LX. Made it really smooth and just uses a $1.00 silicon sleeve with 3" clamps to attach it. You don´t want aluminum filings falling in so if you do use this method put tape over the sensor. The IAT which was on the filter box was moved to the intake pipe closer to the throttle body and with a little circle cut in the rubber pipe and screw it in...not the best but will do until I get pipes for the turbo.

Matthew