PROJECT, 4G MAP SENSOR

[mkymonkey]

i lost lots of mpg when i did this...when i removed it...it all came back up..but then my o2 sensors went so...

[895spdforfree]

i did it and i noticed the engine idled/ran smoother, and just gave an overall smoothness to the powerband, maybe 1 hp increace haha, well i only got a short ram so yeah..

[rustlude87]

like our motors are 2.0 but you know the inetgras are 1.8, and the map sensor is from a 2.2 won't it just dump fuel in the integra? like a lot more than us

[mkymonkey]

thats what i would assume ^^^

[smufguy]

like our motors are 2.0 but you know the inetgras are 1.8, and the map sensor is from a 2.2 won't it just dump fuel in the integra? like a lot more than us

a Map sensor checks the vaccum in your manifold and thus adjusts your ignition, not the fuel delivery. The fuel delivery is taken care of by your fuel pressure regulator which increases or decreases your fuel pressure. IF the vaccum is high (closed throttle aka idling, or at high load) it increases the advance on ur ignition timing (also at high engine speed and WOT) and at normal mode, it retards the timing.

so a map sensor does not add fuel as you know.

[thegreatdane]

ehhh the map sensor is just a sensor. It doesnt do jack shit. And it certainly doesnt correct the ignition timing on a car with mechanical ignition correction.

It reads the vacuum or pressure in the intake manifold so that the ecu knows where in the fuel table to look up how much fuel to inject. That's the simple side of the story..

[MessyHonda]

ok i did this mod like 2 weeks ago. it was very easy the wires almost had the same colors. so i crimped them on and went to plug it in....i did notice it has a lil extra pull all the way to redline. but i also notice that my MPG went down...im geting 25mpg and 80% of that is highway driving under 75mph. with my stock map senson i would get close to 32 mpg....so yeah it took a big dump on gas...anyways you cant beat a free mod...and dyno results would be cool.

[mike10562004]

dose it matter which one the b18 d16 b16?

[MessyHonda]

i forgot to post my findings......i finally got around to dyno it with a stock and an 4th gen sensor



so i gained 2hp and 4 pounds of torque to the wheels...not bad for a thing you can swap in 30 secs

[frantik]

yeah but is the 1-2hp gain worth the 10mpg loss in fuel efficiency? seems like the map sensor is more like something you want for track day than for daily driving

[A18A]

well since they are easy to swap, you could just rig up a switch or something so you can just choose between which one you want with a flick of a switch

[russiankid]

well since they are easy to swap, you could just rig up a switch or something so you can just choose between which one you want with a flick of a switch

Good idea.

[frantik]

how do you switch the vacuum hoses? or do you just split them? and i think thats a lil much for a 2hp boost.. i can put on a red H badge and get more hp

[A18A]

^thats what i thought of the whole map sensor idea from the start

[Oldblueaccord]

Messy whats your setup motor wise?

Those are great numbers. I wish there was A/F ratio to show what was up. That would tell us if the Map sensor was richening the fuel or it was just a better sensor then your original.

I was wondering too if the ECU needed to be reset to take advantage of the change.


wp

[frantik]

he's got an intake, exhaust and adjustable cam gear, plus the map sensor.. i think thats it

[skycam_313]

makes more sense...

[MessyHonda]

yeah but is the 1-2hp gain worth the 10mpg loss in fuel efficiency? seems like the map sensor is more like something you want for track day than for daily driving

im running my stock one right now....i only put in the 4th gen one to see if there was any difference. now...i know there is one.

Messy whats your setup motor wise?
Those are great numbers. I wish there was A/F ratio to show what was up. That would tell us if the Map sensor was richening the fuel or it was just a better sensor then your original.
I was wondering too if the ECU needed to be reset to take advantage of the change.
wp

yeah fitz is right...i only have teg Intake, full exhuast with high flow cat and muffler, adjustable cam gear...it has no markings so i tired to adjust it to OEM specs but i think its more like -1 retard, blaster coil. thats it for now....i already have plans to rebuild the upper half of the engine. i have most of the parts. i got a friend that can help me do an OBD1 swap...im looking for 130-140whp after im finished.

['A20A3']

does anyone have any pictures of this please?

does this mean i get to toss my stupid black box under the hood?

[frantik]

haha no the map sensor is just one small item inside the black box

it's connectected to the wire with the 4 connections that goes into the black box on the front side to the left

[coope]

dame this thread is old but i did i it and got a lot more top end now i can hit 130 and it's easy only took 5mins

[Strugglebucket]

Messy whats your setup motor wise?
Those are great numbers. I wish there was A/F ratio to show what was up. That would tell us if the Map sensor was richening the fuel or it was just a better sensor then your original.
I was wondering too if the ECU needed to be reset to take advantage of the change.
wp

i seem to remember seeing a graph somewhere in the shop manual of the voltage output of the map sensor corresponding to the amount vacuum. if i can find that, maybe the same thing is listed in the 4g manual and then we'd know if there is any difference.

[Ichiban]

does this mean i get to toss my stupid black box under the hood?

What else, other than the MAP sensor, is in the hellbox that is required for proper functioning of the ECU? I'm surprised that the MAP sensor is not mounted directly to the intake manifold.

[Strugglebucket]

umm, there's the variable solenoid for the egr lift control, solenoid for the vac advance, and the solenoid for the intake manifold secondary runner butterflies if the car is 88/89. there might be one more but i can't remember right now.

['A20A3']

umm, there's the variable solenoid for the egr lift control, solenoid for the vac advance, and the solenoid for the intake manifold secondary runner butterflies if the car is 88/89. there might be one more but i can't remember right now.

thanks for that advice man. i have no EGR anymore(i put aluminum plates on the IM where the valve is and where the pipe from the exhaust hooks up)so i guess i can get rid of that solenoid...and possible tuck and hide all the other necessary BS somwhere else...hmmmmm...

i got my 4G MAP sensor yesterday, still gotta put that on too.