2g mass problems help

[jcorn517]

I got a 91 eagle talon tsi awd list of mods are 3" downpipe and cat back exhaust coil on plug setup andost recently 2g mass. The problem I'm having is when engine is not completely warm it runs but spits and sputters real bad and if you try driving it it will just spit and sputter so badly you almost can't drive it.....now when the engine is warm it runs and idles just fine. And I checked for boost leaks I have none anywhere on the car. Now when I put my 1g mass back in it runs and idles just fine like always. This is a daily driver any help will be greatly appreciated thanks guys

 

[Dsmkauai]

So sounds like the 2g mas is bad then and do you have a adapter harness or did you hard wire it?

 

[jcorn517]

Well that's what I thought but I bought it brand new so I've eliminated that problem I'm leaning towards coolant temp sensor but just want outside ideas/opinions

Well that's what I thought but I bought it brand new so I've eliminated that problem I'm leaning towards coolant temp sensor but just want outside ideas/opinions

So I went out unplugged the coolant temp sensor car seemed to run fine. I'm going to let it cool all the way down n go try it cold with no coolant temp sensor

 

[habitatguy187]

You need something to compensate for the 2g mas you can't just throw it in there. You either need some form of tuning or 550cc injectors to "even" it out.

 

[jcorn517]

Makes sense thanks for the help ill be putting my 1g mass back on tonight after work and I will
Let ya know how it turns out should run just fine

 

[Dsmkauai]

I did the 2g mas swap on my gvr4 and also added 550's, idle on cold startup is alittle ruff. But once it's warm it's perfect, didn't really bother me just have to let it warm up abit. I haven't noticed any drivability issues but again I always let it warm up till the idle drops down then I drive it.

 

[jcorn517]

Well my problem was it would idle like crap and even the first few minutes of driving the car would barely move unless you were WOT. So like I said I put the 1g mass back on after work and she ran like a dream. So either my mass is garbage or I needed injectors. So I think I'm going to hold off on the mass till I get link and injectors. Thanks everyone for all the input and quick replies

 

[4g63tc]

the Mass is garbage, same symptoms on Sentras when Mass Sensors fail..no power and won't do over 20 at WOT, swap it back to 1g and be done with it til you can get the Supporting mods.

 

[pauleyman]

Why is everyone saying the mas (not mass) is garbage? It sounds like the OP has stock injectors. Is this correct? If this is so you can't do this without some method of changing parameters ("tuning") if you will or changing the injector size to find something comparable. The 550s are close.
Tell us what you're doing, it isn't real clear. Do you have a way of tuning? What injectors do you have?