I just put everything back together, and now it is running bad. It sounds like its only running on one rotor. Also, when it first starts up, there is a loudish pop, kinda like a backfire. I dont think its a popped seal, or anything, because if I turn off the fuel pump, there are still strong, even pulses.

 

Double check the injector connectors? Pinched oring in the fuel rails?

 

You mean the ones on the injector, or are there others?

 

Well, I can smell a little gas when I start it up. Nothing huge like its pouring out somewhere, but I can definately smell it.

 

On the injector starting from the top is an oring on the neck on the top of the injector, next is at the base of the neck is a grommet, and finally on the bottom of the injector there is a beveled grommet which helps to seat and also seal the injector to the intake manifold or the iron.

Try this:

Turn the key to the ON position and then jumper the fuel pump connector on the passenger side strut tower. This should activate the fuel pump. You should hear it flowing. At this time check for any leaks or fuel spraying out. This should always be done before putting back on the UIM when doing any work with the injectors since it's an easy way to check for leaks without having the car running and it's also very easy to see if fuel is leaking without the UIM on.

 

^thats good stuff, and if the injectors were leaking, that would explain your backfire upon startup. But it doesnt flood at all?

 

did you change the gaskets and make sure the surface area for the new gaskets was cleaned off completly?

 

Yeah, it took me a damn long time, but it was clean. I assume you are talking about the one between teh uim and lim, right?

 

yep

 

If I jumpered the pump without the uim on, wouldnt there be open fuel hoses? I would think that gas would just shoot out of the open hoses.

 

make sure theres nothing leaking. My car was smelling gas because of a leak in one of the tubes. The person whom i bought it from tightened the hoses to tight causing one of the hoses to leak fuel!

 

Tightening it too tight caused it to leak?
I'm gonna tear it down again tomorrow to see if anythings leaking. I replaced most of the fuel hoses, so I dont think thats it. Anyway, its dark out now so I'm dont for the day, plus I think I flooded it last time I shut it off since it had only been running for about 5-10 seconds.

 

I just remembered that he replaced the pintle caps on the injectors, but they looked a little different that the originals. Anyone else that used cruzin performance had a problem with that?

 

Nope. The fuel lines go into the rails and this is assuming your rails are bolted down so no fuel should come out anywhere unless you have a leak somewhere or if your injectors are stuck open you'll be able to see fuel puddle up in the LIM runners.

 

It may or may not have helped this time, but there's a lesson here for everybody. If you pull the UIM and disconnect any part if the fuel system, always pressure test the system by jumpering the check connector and running the pump before reinstalling the UIM. You could save yourself a lot of time and hassle, and maybe even save you car...

 

jason, will you be my dad

 

 

Actually, when you buy them brand new, they are not beveled.
Heat and age causes them to harden in their positions, and it may look beveled to you!


-Ted

 

All of my new ones were beveled (the lower ones). I can take pix of them when I get home.

 

Chamfered they are. Might also depend on who/where you buy them from. Could be both ways depending on the manufacturer.

If you used the old ones and they are rock hard after all these years, that is a potential source of an air leak and a rough idle. You should buy new, soft, malable ones to replace the old ones.

 

Chamfered, beveled same thing in my book . I bought oem ones from mazdatrix btw.

 

I still don't understand how you can jumper the fuel pump with the uim off. Wouldn't you have to have all the fuel hoses hooked up to the secondary, with the injectors in?

 

All the fuel hoses are hooked up still.... to the fuel rails which are bolted to the LIM and the center iron. The fuel rails are independent of the UIM.

 

the UIM (upper intake manifold) has nothing to do with fuel ..

the fuel lines run straight to the primary and secondary rails and then straight bak the way they came ...

you realize your wrong when you take off the upper intake manifold/throttlebody

once you take them off, you will see the lower intake manifold, with the secondary rail close to it, and the primary rail is bolted to the block ... you remove nothing related to fuel lines or injectors so to say by taking off the UIM

trust me/us
just go out there, and remove the upper intake mani ...

then jumper the fuel .. i just did this last weekend ...

if you mess with anything fuel related, be sure to test the fuel system by jumpering it before replacing the UIM to check for leaks


wheres that pic of the emmissions removal that floats around on this board ... you'll see what where talking about if you look at that pic


ill go look for it




***EDIT***
heres the diagram that i found while searching for emissions how to's

follow the red line ... that is the fuel lines .... the upper intake manifold is pictured (See thru), but just ignore it .. as it pops up and away, it doesnt take any fuel related lines or rails with it .. its totally removeable without touching anything fuel related

and yes i might say fuel related a few more times

 

My secondary fuel rail is bolted on to the uim, and the injectors go into the uim. I'll try to get a picture.
Edit: I can take the uim off without removing any fuel lines, but i would have to hold the injectors in to keep fuel from coming out.