I will double check but I made sure they were seated properly and tight. I don't understand how a brand new set of injectors could poasibly be faulty.

 

they may not necessarily be faulty. when you went to install them, you could have rolled the little rubber o-ring up a little bit. it happens. they are gentle and fragile. it isnt an uncommon thing either.

 

Not leaking any fuel so I would assume the O-ring are seated properly.

 

You'd smell fuel vapors and a boost leak test would definitely show a problem.

 

HOLY SH!! im having the same problem after putting in fp-red,br fuel rail, PTE 880's im having trouble starting the car and the idle is crap wants to die all the time its driving me crazy.. now i might have to switch them out to see!

 

seems like the injectors may be at fault since the stock ones work fine, that suggests to me that everything else is working properly, be sure to give it enough time to make sure.

 

its the injectors!! i've seen a ton of writes on this problem right after injector installs!! the fix.. idk

 

I didnt mean leaking from the o ring or externally, internally were they spray might be leaking which whould cause the engine to flood and have a hard time starting..

 

after you get the car started hows your idle and how does the car drive??

 

I am having a similar problem. Cold starts are 100 % fine. Warm / hot starts require me to hold / floor the gas pedal and a lot of cranking. If it is a warm / hot start immediately after turning the car off (meaning I drive the car for a while turn it off and then back on within a minute or two) it is fine - starts without using the gas pedal.

I have had issues getting the injectors to seat properly and believed that was the issue. Now I am almost 100% the injectors are seated properly. I am guessing the car is not getting enough fuel when warm, but not sure why.

 

if you're having better luck holding the throttle open during cranking wouldn't that mean that you have too much fuel? I'll admit that I didn't get much sleep last night so I may not be thinking clearly just yet

 

^^ Yes lol....I meant to say too much fuel as the (flooring the gas pedal just opens the throttle right ???)....Interesting why cold starts are fine though and warm starts are not....

 

i have the same problem after a BBK full instal 950cc injectors and an o2 dump ive brought it back twice and the problem is still there. i highly doubt its anything but the injector scaling or being seated incorrectly because my car has only 17k miles

 

I believe that by holding the throttle plate open you're "choking" the engine and allowing it to pull in more air.

I've seen scenarios where fuel pumps or injectors aren't seated properly which cause an internal or external fuel leak respectively. So if you shut off the engine, the fuel pressure is still there for the most part and a quick startup isn't a problem. However, if the car is left sitting for some time, the leaks allow the fuel pressure to drop substantially and start-up issues can arise.

It's common for customers to seat the fuel pump improperly when installed and bunch up or pinch the seal. Injector seals loved to get sliced on the fuel rail while being inserted, especially if you forget to lube them up with clean oil first and take you time. Sometimes I think there's a ninja in the fuel rail wreaking havoc on o-rings

I often have remote tuning customers re-seat their fuel pumps when I see odd pressure issue at high rpm which cause me to overcompensate in the fuel map. It's a common problem.

an easy way to detect if you're losing fuel pressure while the car is sitting is to install a fuel pressure gauge, when you shut off the engine it'll likely show 45psi. Come back out later and see if it's down to 0, if so I can see why it would take extra cranks to fire up as the fuel pressure builds up. On the old muscle cars we would put electric pumps on them to build pressure with a flip of a switch, then hit the starter button.

 

Chris - My car fires right up when cold (been sitting in a garage for a long period). That said, the warm / hot starts are an issue - forcing me to crank the car for a long long time....The only thing that seems to help slightly is to hold the gas pedal down (opening the throttle plate).

I guess I need to log the situation (PITA), but would I adjust the IPW adder and would I reduce the ms ?