3bar sensor, how do you keep it plugged in the intake under boost?
3bar sensor, how do you keep it plugged in the intake under boost? I replaced my stock sensor with the new 3 bar sensor in the same intake hole. It seems to be a good spot for it but I'm worried about it popping out under boost. It doesn't seem to be in there too tight. I'm going in for my sd tune on thursday and I don't want this to hold things up. I was thinking about using a large zip tie around it to make sure it can't come out but I bet some of you have thought of a better way. Let me know how you have yours installed or if you just have it plugged in with no problems. Also how much boost? I don't think my car will make more than 7-8 psi so at that level it might not even be a concern but if it keeps popping out, I'm sure my tuner won't be very pleased. Better safe than sorry.
Originally Posted by rufretic
I replaced my stock sensor with the new 3 bar sensor in the same intake hole. It seems to be a good spot for it but I'm worried about it popping out under boost. It doesn't seem to be in there too tight. I'm going in for my sd tune on thursday and I don't want this to hold things up. I was thinking about using a large zip tie around it to make sure it can't come out but I bet some of you have thought of a better way. Let me know how you have yours installed or if you just have it plugged in with no problems. Also how much boost? I don't think my car will make more than 7-8 psi so at that level it might not even be a concern but if it keeps popping out, I'm sure my tuner won't be very pleased. Better safe than sorry.
Secondly, I suggest you plug the hole and connect the MAP to a secure vac source if you are running very high boost. For under 10psi, I dont think you'll have a problem using the stock location. Just make sure it is snapped in. Sometimes it is hard to tell, but you will feel it snap in. I've seen the MAP sensors pop out above 13psi. If this happens with a SD tune, you could possibly be fuked. It will read atmosphere (zero boost) when you are truly boosting and it wont give the motor anywhere near the fuel it needs and then kaboom. Time to build a new motor.
If I were running this type of setup with very high boost (over 10psi), I would personally just connect it via hose.
Now, you will know when it pops off if the car is idling. It will run like ****. But if it pops off during high boost, which is obviously the only time it will actually pop off, and you arent aware of it, you will run lean!
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Joined: Jul 2005
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From: kuwait
if you need to use 2 bar you can call BOB @ EPP he will give you 2 bar map sensor that you can plug it in the back of the intake and you will be good to go 
.and for the 3bar map sensor you gust plug the hole in the back and use any VAC. in my car am using 3 bar map sensor in MY V.G intake have a VAC hole that i can take it from the side of the intake.good luck
.and for the 3bar map sensor you gust plug the hole in the back and use any VAC. in my car am using 3 bar map sensor in MY V.G intake have a VAC hole that i can take it from the side of the intake.good luck
Originally Posted by SSnakekiller
First of all, why go 3bar if you are only using half of 2bar? With a 2bar sensor you will be good up to ~ 14psi.
Secondly, I suggest you plug the hole and connect the MAP to a secure vac source if you are running very high boost. For under 10psi, I dont think you'll have a problem using the stock location. Just make sure it is snapped in. Sometimes it is hard to tell, but you will feel it snap in. I've seen the MAP sensors pop out above 13psi. If this happens with a SD tune, you could possibly be fuked. It will read atmosphere (zero boost) when you are truly boosting and it wont give the motor anywhere near the fuel it needs and then kaboom. Time to build a new motor.
If I were running this type of setup with very high boost (over 10psi), I would personally just connect it via hose.
Now, you will know when it pops off if the car is idling. It will run like ****. But if it pops off during high boost, which is obviously the only time it will actually pop off, and you arent aware of it, you will run lean!
Secondly, I suggest you plug the hole and connect the MAP to a secure vac source if you are running very high boost. For under 10psi, I dont think you'll have a problem using the stock location. Just make sure it is snapped in. Sometimes it is hard to tell, but you will feel it snap in. I've seen the MAP sensors pop out above 13psi. If this happens with a SD tune, you could possibly be fuked. It will read atmosphere (zero boost) when you are truly boosting and it wont give the motor anywhere near the fuel it needs and then kaboom. Time to build a new motor.
If I were running this type of setup with very high boost (over 10psi), I would personally just connect it via hose.
Now, you will know when it pops off if the car is idling. It will run like ****. But if it pops off during high boost, which is obviously the only time it will actually pop off, and you arent aware of it, you will run lean!
Originally Posted by Inspector12
Well I tapped the stock hole for a brass barbed fitting and hose to the Map etc... the two bar you can get at the dealer it is a map sensor for a saturn redline S/C.
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Originally Posted by firehawk123
and for the 3bar map sensor you gust plug the hole in the back and use any VAC. in my car am using 3 bar map sensor in MY V.G intake have a VAC hole that i can take it from the side of the intake.good luck
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Originally Posted by rufretic
That's what I wanted to do but it's too hard to get at back there and I don't want to have to take off the intake.
Originally Posted by Inspector12
Well I had mine off anyways. You can alway put a t in the brake booster hose and run it to the map sensor also.
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Joined: Oct 2005
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At the risk of making this too technical here's something to consider. I don't have a map sensor handy at the moment to measure, but let's say the hole in the manifold is .250". That's only .049" sq inches. At that size with 28 psi in the manifold (2 bar of boost) you would only have 1 3/8 psi of force trying to pop out the sensor and grommet. This is easily overcome and usually isn't a problem at all.
I'm running 2 bar and had the map sensor pop out due to me botching the install when putting things back together...didn't snap it all the way in.
I was making a boosted tuning pass when it popped out. The car defaulted to a 11.5 a/f ratio on its own as measured by my HPT and WBo2. After I let off the a/f stayed that way until I got it home, talk about running like a dog, but it was pretty safe.
I noticed what was up when I took a quick look at my MAP pid on HPT and saw that it flatlined....knew what happened right away after that, and the huge sucking noise coming from the intake LOL. Glad GM did that "save" in the tune themselves.
My experience with it popping out....but I doubt it'll pop out if you install it right.
I was making a boosted tuning pass when it popped out. The car defaulted to a 11.5 a/f ratio on its own as measured by my HPT and WBo2. After I let off the a/f stayed that way until I got it home, talk about running like a dog, but it was pretty safe.
I noticed what was up when I took a quick look at my MAP pid on HPT and saw that it flatlined....knew what happened right away after that, and the huge sucking noise coming from the intake LOL. Glad GM did that "save" in the tune themselves.
My experience with it popping out....but I doubt it'll pop out if you install it right.
Originally Posted by rufretic
That's what I wanted to do but it's too hard to get at back there and I don't want to have to take off the intake.
Originally Posted by frcefed98
I'm running 2 bar and had the map sensor pop out due to me botching the install when putting things back together...didn't snap it all the way in.
I was making a boosted tuning pass when it popped out. The car defaulted to a 11.5 a/f ratio on its own as measured by my HPT and WBo2. After I let off the a/f stayed that way until I got it home, talk about running like a dog, but it was pretty safe.
I noticed what was up when I took a quick look at my MAP pid on HPT and saw that it flatlined....knew what happened right away after that, and the huge sucking noise coming from the intake LOL. Glad GM did that "save" in the tune themselves.
My experience with it popping out....but I doubt it'll pop out if you install it right.
I was making a boosted tuning pass when it popped out. The car defaulted to a 11.5 a/f ratio on its own as measured by my HPT and WBo2. After I let off the a/f stayed that way until I got it home, talk about running like a dog, but it was pretty safe.
I noticed what was up when I took a quick look at my MAP pid on HPT and saw that it flatlined....knew what happened right away after that, and the huge sucking noise coming from the intake LOL. Glad GM did that "save" in the tune themselves.
My experience with it popping out....but I doubt it'll pop out if you install it right.
At whatever kpa that might be, it will adjust fueling according to those cells at that level in the VE table.
In our case, at 10+psi when it popped off, the wideband on the dyno immediately read 14.5+ AFR and we immediately let off.
Either making a bracket to make sure it stays down, or tapping into the vac line off the brake booster are 2 good ways to ensure this doesnt happen on a SD tune.
