Car stalls when putting into neutral

[n0c7]

I purchased my 95 Eclipse GS-T with a handful of aftermarket parts installed already. One of them is an APEXi blowoff valve. I've taken the time to read the newbie information and found out the downside to having a BOV. I'm not sure if the problem I'm having is directly related to the BOV or not. The problem is that no matter what gear or speed I'm going, if I throw it into neutral instead of gearing down, the revs bounce down to 100rpms and usually bounce back up to the 900rpm-ish idle, but sometimes the car will stall, and other times it will just idle roughly for a second or two. Is this related to the oxygen sensor and having the BOV blow off into the atmosphere? If so, how can I keep my BOV and fix this problem? Thanks!

 

[n0c7]

I've been doing some reading and I just realized that if I am idling and rev the engine, it will stall or come very close as well. I've been told I will need a MAFT translater and a 3" gm sensor, but I have no idea what these parts are or what they do. Any opinions on if this is the proper way to go about it and still keep an atmosphere BOV?

 

[ECLIPSE4x4]

I believe there is a recirculation kit for that BOV to be vented back into the system.

Get that, also check the BISS on the intake, it may be ready to fall out.

There are a few other things to but chekc the basics and get the BOV recirulated.

 

[95Eclipsers]

Im in the same position and ive been tryin to figure it out for months it stalls even easier wiht the a/c on! help...

 

[95Eclipsers]

also what is a MAFT and 3" gm

 

[Meh987]

Is the BOV leaking? Also, did you cap off the intake pipe where the BOV dump tube was?

A 3" GM MAF is a mass air flow sensor off of a General Motors vehicle. There's a whole list (search for it) of cars that you can use the MAF from. The MAFT is a mass air flow translator. It lets us use the GM MAF on our DSMs.

 

[Tallen]

Here is (part) of your problem, assuming that the BOV is vented to the atmosphere. You hit the clutch, the BOV releases any pressure to the atmosphere and loses alot of air that has been detected by the air sensor. Now the air sensor does not know it lost all this air, so it still continues to put the amount of fuel into the car that it calculated, thus you run into a rich condition. So when the engine goes to idle speed its being bombarded with fuel and boggs.
You may want to adjust the BOV so it releases with a little bit more pressure for the time being, this way it will only bog if you are boosting and hit he clutch. As stated, try to find a recirculation kit for the BOV. Check for boost/vacuum leaks too.
The GM MAFT is a hotwire MAF, it replaces the stock sensor. Instead of the sensor being on the intake tube, you can put one of these on the intercooler piping PAST the BOV. This way if you vent, it will only be seeing the air that gets past the BOV (the car never knows you lost the air).

 

[crankbender]

Venting can also cause you to suck in air during cruising. this can seriously damage your motor if it is not filtered and can do all sorts of things to the ecu trying to control fuel.

Just recirc...

 

[rghrdr18]

first off, is the Apexi BOV venting to the atmosphere? If so, Dejontool.com has the parts needed (if you want to keep the BOV). You will need the blow thru upper intercooler pipe (part number UIP-2gD2) flanged for the Apexi BOV [located on the Dejon website under the 2g SidemountIC & Pipes section, the GM MAF (part number GMAF30), and the MAF translator (part number trans-2G [both located under fuel control]. These parts are a little expensive, your looking around $530 for the parts, but it will allow you to modify your car's fuel to cause it not to die between shifts. These parts are definitely worth it though, and you might need to replace the intake too, because the stock MAF is going to need to be taken out.

Another option is to see if you can adjust the Apexi BOV to not blow off into the atmosphere. Hope this clears up any confusion. The "vent-off to atmosphere" is a cool thing, but it really does not help in adding hp to your car. Best of luck with whatever you choose.

 

[n0c7]

Is the BOV leaking? Also, did you cap off the intake pipe where the BOV dump tube was?

A 3" GM MAF is a mass air flow sensor off of a General Motors vehicle. There's a whole list (search for it) of cars that you can use the MAF from. The MAFT is a mass air flow translator. It lets us use the GM MAF on our DSMs.

I don't think the BOV is leaking, I will check though, and yes it is capped off, with electrical tape Professional install too.. hahaah

 

[n0c7]

first off, is the Apexi BOV venting to the atmosphere? If so, Dejontool.com has the parts needed (if you want to keep the BOV). You will need the blow thru upper intercooler pipe (part number UIP-2gD2) flanged for the Apexi BOV [located on the Dejon website under the 2g SidemountIC & Pipes section, the GM MAF (part number GMAF30), and the MAF translator (part number trans-2G [both located under fuel control]. These parts are a little expensive, your looking around $530 for the parts, but it will allow you to modify your car's fuel to cause it not to die between shifts. These parts are definitely worth it though, and you might need to replace the intake too, because the stock MAF is going to need to be taken out.

Another option is to see if you can adjust the Apexi BOV to not blow off into the atmosphere. Hope this clears up any confusion. The "vent-off to atmosphere" is a cool thing, but it really does not help in adding hp to your car. Best of luck with whatever you choose.

Always a gamble, thanks bro.

 

[n0c7]

Im in the same position and ive been tryin to figure it out for months it stalls even easier wiht the a/c on! help...

I can't even run the A/C on a hot day, starts to overheat within 10 minutes. The cars' cooling was adjusted to the right temps with the A/C off, they didnt put that into the equation, now I have to rethink it. Brrrrr.

 

[crankbender]

I can't even run the A/C on a hot day, starts to overheat within 10 minutes. The cars' cooling was adjusted to the right temps with the A/C off, they didnt put that into the equation, now I have to rethink it. Brrrrr.

Your cooling system is auto correcting it doesn't need to be adjusted. if you are overheating you need to look at your coolant flow, thermostat, and radiator.

As for your idle problem have you answered these questions.

Is your BISS adjusted correctly (by the book)?
Is your BOV recirculated?
Is your ISC operating correctly?

Check those then see where you stand.

 

[95Eclipsers]

so basically if i recirc my hks ss blow off valve i wont be able to hear it, but my car wont stall....

 

[n0c7]

Your cooling system is auto correcting it doesn't need to be adjusted. if you are overheating you need to look at your coolant flow, thermostat, and radiator.

As for your idle problem have you answered these questions.

Is your BISS adjusted correctly (by the book)?
Is your BOV recirculated?
Is your ISC operating correctly?

Check those then see where you stand.

I was told to drain the fluid and do a 75% water 25% coolant mix, havent got around to that yet though. I will check everything else out as well.

As for the idle problem, I think its the BOV because it blows off to the atmosphere and isnt recirculating.