Stevo86

Check your work. If new symptoms present themselves after you do something it's usually your fault.

GT210

Alright Steve I will go over everything again here in a little while and let you know what I come up with

GT210

This is me doing the Intake on my gt.

Stevo86

Good to go man hope you get it worked out. Keep in mind that wasn't an insult. I had to learn that lesson from experience more than once.

So I watched your video....is that a Dorman intake? If so in using the factory gaskets and Dorman intake (which uses o-rings not gaskets) you have double gasketed your intake. So yeah if that is the Dorman that's why it's running like crap...

Another edit: Are those different sized fuel injectors without a new tune? Cause that isn't gonna work either.

GT210

Yes that is the Dorman intake and this is my first mustang I'm a honda guy but now have a gt as well. As for double gasketing my intake I bought all this from AutoZone Yesterday and I took everything in there and they even told me those gaskets would work with that dorman Oh man these guys. I cant believe I have done this lol Ok so what gaskets do I need to get to make this work. Now as for the injectors my old ones were pink at 19 lbs and these are new at 19 lbs as well reason why I replaced them is cause when i took the old ones out a couple of the tip broke off. I didn't take that a insult either I appreciate all the help and advice. Im glad you caught all this cause I was about to head back to autozone to get a new tps sensor.

GT210

Alright found my answer I think I just have to remove the gaskets that sits on top of the block is this correct??

Stevo86

Yeah the Dorman intake has the o-rings already set into the bottom of the manifold. You should see them under there. Just pull off the stock style gaskets and put it back down.

If it was 19lb for 19lb you're good but if you have an '04 GT you have 21lb injectors from the factory. Which is what they looked like since they were pink. So if you went from 21-19 lbs you're car is going to be running lean.

CalBoy101

I could be wrong but from what I understand Ford didn't change the ECM tuning when they went from the 19 lb to 21 lb injectors. There standard replacement injector for all the 2v years is now the 21 lb one.

So under light to medium throttle the ECM has enough adjustment room to set the right mixture with either injector set.

Full throttle is where you can have a problem, apparently they realized that the 19lb injectors were just barely supplying enough fuel in this case so they bumped to 21 lb ones. But 19 lb ones in good shape do work, plenty of guys have gone pretty fast on them and since they are new they should be flowing well. Where did you buy them, if they are Ford ones they might be 21 lbs, but like I said if they are 19's you should still be ok.

GT210

@Stevo86 Hey there buddy I did exactly what you said to do. I took the bottom gaskets off and put it all back together and man I started it it fired right up idle was perfect no fluctuation in rpms what so ever. Man I cant Thank You enough Sir!!! Hands down to you man I really appreciate all the help!!!

GT210

@CalBoy101 Hey there I bought these from a local shop here in San Antonio they were pulled off a newer gt that went boosted. I started the car this am and she seems to be doing really good right now. I haven't really got on it yet due to the brand new tranny so I'm gonna take it easy on it for awhile and then dig in on it