mrfred

iTrader: (50)

Don't think I ever said that. When I first started running FIC1050s and was having warm start issues, Jens put a set on this injector stand and found a very small drop forming after a long period of time (can't remember how long, but something of the order of 15-45 minutes). He told me that he subsequently altered his injector prep process for the Delphi injectors to stop this from happening. I never followed up with another set (and instead switched to FIC1100s which are not a Delphi injector), so I don't have any experience with how well it was fixed.

C130flyer

iTrader: (8)

I was just being dramatic.

I apologize for throwing you in it.

I checked my fuel injectors today (FIC1050cc) and they are not leaking.

Soooooo back to the drawing board.

I am gonna order the fuel rail adapter from the dealership so I can hook up my fuel pressure tester. Hopefully its a bad regulator.

Also, I did some checks to the regulator with compressed air and here is what I found:

With the vacuum port disconnected, air will NOT flow thru the regulator.

with vacuum applied , air will flow thru it.

Does that seem normal? Should the regulator be completely closed with no vacuum/boost signal?

Your thoughts?

mrfred

iTrader: (50)

Ah.

If the injectors leak, it will only be under pressure. Did you figure out a way to pressurize them and observe the injector tips?

Putting vacuum on the pressure regulator lowers the pressure at which the fpr will allow flow.

B.J.@ToxicFab

iTrader: (26)

I've been running the FIC 1050s since April & I am just now having some cold start issues. Warm starts seem to be fine but I will be keeping my eye on this thread & checking some stuff out soon.

C130flyer

iTrader: (8)

I checked fuel pressure today.

36psi with vacuum applied.
45psi with vacuum removed.

That is within limits according to the Dealer service manual.

Also I pressure checked the injectors up to 90psi no leaks.

I am at a loss right now.

I am going to start checking the ignition system now.

I put new plugs in today. We will see if that helps.



Also the problem is slightly worse on E85 and slightly better on 93oct.

mrfred

iTrader: (50)

Try warming them to about 150-175 F, and then running the leak test again.

C130flyer

iTrader: (8)

i did that

C130flyer

iTrader: (8)

MrFred:

Is the fuel pump supposed to prime when the key goes to the on position before start?

mrfred

iTrader: (50)

it does on evo 10s, but i've not ever heard mine prime. i've not looked in the code either.

Spec-Ops1

iTrader: (38)

Nevermind, read the first post...

C130flyer

iTrader: (8)

I poured some fuel into the intake mani about 2 ounces. It made things worse.

So its probly getting too much fuel.

Im gonna zero out the cranking enrichment table and see what happens.

C130flyer

iTrader: (8)

UPDATE:

I fixed it. It was the EVAP system and the EGR system leaking air.

Thank the LORD!!!!!

6 days of troubleshooting..... OVER!!!!!

To everyone that helped thanks.

evoxsi

iTrader: (8)

where was it leaking air from?

C130flyer

iTrader: (8)

Honestly, I'm not sure.

I completely removed all the emissions stuff, and very securely blocked it all off.

Problem went away after that.

Car runs great, starts great, I happy.

taylorgang

iTrader: (5)

How difficult is it to remove the emissions stuff? I was going to just buy new injectors but I'd rather not if I don't need to...