1G map sensor location

[enriquez2000]

I think Im just going to fix all my issues by ditching my maf and going speed density. Since I have a 1g can I put the map sensor where the hose for pcv hooks into the intake manifold and then route the pvc hose to maybe say the turbo intake pipe?

Looking for the most painless way to do this since the 1g has no mdp and limited vacuum ports which are already taken by the FPR

 

[Mello]

I bought a 3-way male-male-female adapter & put it on my brake booster line. Just unscrewed the nipple from the manifold to screw the adapter in, replaced the nipple into the other straight-thru side & put the MAP on other. Clean & works perfect. Don't forget the air temp.

BTW-Switching to SD doesn't mean boost leaks are not a problem. You still need to fix them.

 

[enriquez2000]

I bought a 3-way male-male-female adapter & put it on my brake booster line. Just unscrewed the nipple from the manifold to screw the adapter in, replaced the nipple into the other straight-thru side & put the MAP on other. Clean & works perfect. Don't forget the air temp.

BTW-Switching to SD doesn't mean boost leaks are not a problem. You still need to fix them.

could be a way to go... any link to what you got by chance?

Im going to run SD without IAT for now and zero out the wieght scale in DA until i get my fmic kit to permanently weld in a bung.

I still will be fixing boost leaks but they arent as big an issue on SD. Meaning you can "tune" around them until all fixed.

 

[Mello]

No AIT is going to be a problem. A quick fix is to use the AIT in the MAF. Also, I have never been able to tune around mechanical problems, ever. I recommend being smart and fixing your problems.

 

[enriquez2000]

No AIT is going to be a problem. A quick fix is to use the AIT in the MAF. Also, I have never been able to tune around mechanical problems, ever. I recommend being smart and fixing your problems.

Well i am fixing leaks this weekend. Why does ecm saying running without an IAT is no problem at all?

 

[91stocker]

Not the most painless way, but the best location is to tap the blank on the back of the IM.

Like so:

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[enriquez2000]

Not the most painless way, but the best location is to tap the blank on the back of the IM.

Like so:

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Which i would totally do if i was removing manifold

 

[91stocker]

Honestly if you're going speed density i'd pull the IM to tap it and have a bung for the IAT welded into the tb elbow.

 

[Mello]

This is how I did my MAP. There is no need to drill & tap the intake. Also, I have no idea why ECM made their statement. I suppose that technically you can run without an AIT but you will never be able to control your AFR's from DD, especially if you've running a cone filter.

 

[enriquez2000]

This is how I did my MAP. There is no need to drill & tap the intake. Also, I have no idea why ECM made their statement. I suppose that technically you can run without an AIT but you will never be able to control your AFR's from DD, especially if you've running a cone filter.

I like that. What size adapter is it? Will save me from an intake manifold removal

 

[edged1g]

Since I have a 1g can I put the map sensor where the hose for pcv hooks into the intake manifold and then route the pvc hose to maybe say the turbo intake pipe?

Absolutely 100% DO NOT DO THIS! You will have more issues than you have now if you do this. The reason is

...the PCV port ties into a galley that runs the length of the manifold, which is in turn tied into the base of each runner through a very small hole.

You will end up with a very "choppy" boost signal that will cause rapid airflow changes that you will not be able to tune around. Pull the intake and do it right.

 

[enriquez2000]

Absolutely 100% DO NOT DO THIS! You will have more issues than you have now if you do this. The reason is



You will end up with a very "choppy" boost signal that will cause rapid airflow changes that you will not be able to tune around. Pull the intake and do it right.

I like what mellow did for now anyway until i rebuild and can tap my own. Are we 1/4 npt threads in the nipples?

 

[1990TSIAWDTALON]

You can also use a vacuum "tree" that hooks into the PB line then trees off to 2,3 or 4 more ports. Just another option. I didn't have to use one as my Evo3 intake has enough ports but my son's car had to have one for all the "extra's" he has and needs a vacuum/pressure port for.

 

[edged1g]

I like what mellow did for now anyway until i rebuild and can tap my own. Are we 1/4 npt threads in the nipples?

Something like this would work. No need to change any threads. Just screw it in.

 

[enriquez2000]

Something like this would work. No need to change any threads. Just screw it in.

So we are 1/8 inch npt? All i need to know is what screws in so i can buy the right piece

 

[Mello]

My MAP is 1/8 NPT. Just pull the Booster nipple and use it to match your adapter. It's been a real long time since I did this but I think the booster nipple is 1/4 NPT. Also, I'm not sure but I may have bought my adapter from Home Depot or McMaster, can't exactly remember though. Here's another pic from the side.

 

[Smilinjay]

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Here's how I have mine set up. But I also pulled the manifold to tap it. Then just made a little bracket to mount it where the stock manifold support would bolt up. But from the sound of it you have the threaded aem sensor. if I were you I would t it into the brake booster line for now and tap it properly whenever you have the intake mani off. That's what I did and didn't run into any issues.

 

[enriquez2000]

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Here's how I have mine set up. But I also pulled the manifold to tap it. Then just made a little bracket to mount it where the stock manifold support would bolt up. But from the sound of it you have the threaded aem sensor. if I were you I would t it into the brake booster line for now and tap it properly whenever you have the intake mani off. That's what I did and didn't run into any issues.

I have a gm 3bar sitting around. This is eventually what i would do but the npt y fitting will work for now i think.

 

[Mello]

I've had too many GM MAP's malfunction on several cars and have since switched to better MAP's.

 

[Smilinjay]

I have a gm 3bar sitting around. This is eventually what i would do but the npt y fitting will work for now i think.

Yup. To be honest I just used a brass T fitting that I got from a hardware store. I cut the actual brake booster line and then t'd in a vac line to the map sensor which I mounted out of sight.

 

[enriquez2000]

I've had too many GM MAP's malfunction on several cars and have since switched to better MAP's.

I use omni 4bar on my honda.. but i have this gm thats nrand new sitting in a drawer to use until i need to swap

 

[1990TSIAWDTALON]

Just so you know, the GM bracket off of a mid 80's Camaro (probably any GM car 86ish) has the bracket for the Omni or GM Map sensor and it is what I am using and mounted it on the firewall but that's completely up to you. I just wanted all to know there is a bracket readily available to mount them with.

 

[blktalon3]

Here mine, it's mounted with a simple bracket on two of the fuel rail bolts. Then a very short piece of the biggest vacuum line that would fit snug on the ports routed directly into a port in the IM. Works great

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[92AWDHX40]

I tapped mines like slim Jay I wanted the shortest route for my sensor.

 

[miliman13]

Here mine, it's mounted with a simple bracket on two of the fuel rail bolts. Then a very short piece of the biggest vacuum line that would fit snug on the ports routed directly into a port in the IM. Works great

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This is probably the best in my own opinion, however i like how it looks the wat JAY did it, but back to this; if your on a catch can "witch we should all be one" then this is the perfect spot to connect to. Nice and short.