thanks bud

 

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I just take off the fuel rail, that #2 oring is tear up pretty bad, every other oring look really good. I find out that one of the fuel injector retainer is missing, can I buy this off part store without going to dealer ?



thanks

 

after fix all that o-ring, car still have these 3 code, even I delete it with obd 2 code reader. car still take 4-5 second to crank, I hook up the fuel pressure gauge, when i prime the pump, it jump up for 50psi then drop down to nothing in second. car still drive smooth. im running out off option.

P0172 - fuel trim system rich, Bank1
P0174 - fuel trim system lean, Bank2
P0400 - EGR system

all the hose to EGR is fine, ( can I run the car with bad EGR ? we do not have emission here ), I just wonder any performing lost or engine damage ). btw is any one have any extra clip retainer ( pix above ) for sale or give away, i pay for s/h, thanks

 

If you get good pressure that bleeds down to zero immediately, you likely either have a bad fuel pressure regulator, bad fuel pump check ball, or leaky injectors. If you pull up the rail and prime the system, check to see if any injectors leak, don't try to start the car, lol. Pull off the vacuum line to the fpr, if you see or smell gas, the fpr might have a bad diaphragm. Lastly I would suspect you need a new fuel pump.

 

Probably a bad regulator. They tend to crap out from time to time. Still check if any injectors are leaking.
If the regulator and injectors are ok, then the only thing left is the pump.

I have my stock regulator and injectors sitting around if you end up needing something.

 

BACK, Just replace EGR ( ac delco ), now car now only 2 code kinda diffrent code from last time.

P0172 System too Rich (Bank 1)

P0175 System too Rich (Bank 2)

I havent check for fuel injector leaking yet. Properly tomorrow.

 

FYI, those injector clips are not needed. Once the rail is bolted down it isn't possible for them to come loose. I don't have them on my current motor.

If you want them, I have my old ones.

 

foreal ? im up for it.

 

btw, how do I know if my FPR is bad ? I still have that trouble hard start, and i use this camaro every day, i dont have time to pull the fuel rail to check for fuel injector leak.

 

Update, I finally have time today to pull the fuel rail check for fuel injector leak. I found no leak. car still throw the same code, and have hard time start some time, like if im not let the pump prime before it start, it will take 5-6 second before it crank, car still lose fuel pressure. but when it crank, it ran fine, no idle problem or missfire at all. here what I already did

1: replace all injector O-ring
2: check for fuel injector leaky test

what else I need to do ? thanks

 

Just saw your post, and I literally tossed those clips a day ago. Trust me though, you don't need them at all.

Judging by what you describe, I would almost certainly point the finger at your fuel pump. If you still suspect it's the regulator and/or injectors, read on.

Testing the regulator is fairly easy. Pull the vacuum line off the regulator and look for fuel. If fuel comes out the back of the regulator, the rubber diaphram is bad and you need a new reg. If you have a vacuum pump, you can also apply vacuum to the regulator while monitoring fuel pressure to determine if the fuel pressure rises with vacuum. If not, it's bad.

Also, you said you checked for fuel injector leakage right? The problem is if your pump is bad and the rails aren't fully pressurized it is likely you won't see any leakage. I would pull the spark plugs individually and check for any plugs that look to be running excessively rich, so that you can pinpoint the faulty injector (if one exists). You may want to pull all of the injectors and have them tested individually. Also inspect the wiring to make sure none of the injector wires are broken or grounded out, holding the injector open.

Good luck.

 

I just did what u told, I pull the vacum line off the regulator while the car is running, I dont see any fuel coming out off it.

 

Then I would suspect fuel pump.

 

fuel pump is making buzzing noise the whole time. since the day I got the car 3 month ago. Its on it way out ? btw my check engine light is off since yesterday, it havent come back on today yet. Car ran fine and pull hard like alway. How do I know if my fuel pump is complety dead ? ( car wont crank ? it wont prime ? ) thanks

 

^^^+1.

 

It does not mean your pump is 100% dead. If you have a weak pump, it can take time for pressure to build, hence the long start condition. The pressure symptoms you speak of almost entirely point to the fuel pump.

 

should I replace the pump now ? what is good pump, that plug and play ? thanks

 

Get a Racetronix fuel pump kit. The upgraded harness is optional.
I also recommend doing the trap door method.

 

Agreed. The harness kit may be a little more expensive, but it's worth it. That's what I went with when my pump crapped out.

www.racetronix.com

 

can you explaint more about the harness kit ? what it make better then factory, and how hard its to hook up ? can I just buy racetronix pump work without the harness ? will any mod to make it work ? my mechanic will not cut the trap door metrol, he droping the ******* tank, that what he told me.