FPR- fuel pressure regulator hose...

i dont think installing your old turbo would help. dont waste your time on that. it sounds like an ignition problem. what wires do you have?? magnacore had a problem with their wires crossfiring. go back to stock on the wires.

 

also..i had this problem when i installed the HFX fuel pressure regulator....
all it took me to fix it was to replace the HFX to an HKS..

if you are using an AFTER MARKET fpr...do check that.

 

I'm doing the turbo swap back to stock because i tried everything you can think of .. this is just to eliminate the possibility that it could be a turbo problem .. you never know, i may encounter the real problem as i am swapping the turbo..

FPR is stock.

Swapped coils and plugs and had new plugs in and still the same ..

This problem happened RIGHT after i installed the green + injectors + tune .. since then i swapped back to the stock injector and pre-injector tune and its still making loud popping sounds in the engine bay and popping sounds in the exhaust..

What else do you think i should try?

 

bump !

 

Did you swap the stock turbo back on yet? See if there is excessive shaft play on your Evo Green.

 

Testudo ..

we got a weekend coming up and the shop doesn't open on weekends (our weekends are Friday-Saturday). However, by tomorrow they would have removed my evo green, and when they open again i would reinstall a friends stock turbo to see if the green was the culprit.

 

i aint got it being the FPgreen. it is a part that is just delivering the air. not the timing, spark, or fuel. it just provides air... it is SOLEY dependent on the exhaust flow through the turbine wheel.

 

^
i didn't quite understand what you wrote .. what do you think the problem is then?

 

bump .. i need help ..

could it be something has gone wrong during installation of the turbo? what could it be?

 

does your check engine work? Just checking. I aways keep forgetting to plug the harness back on the air flow meter. My car runs like crap when I do that.

 

check engine light works .. because i just got the p505 and got that resolved..

it's really weird..sounds ignition related, yet everything in that area i've checked and it seems to be ok..

anyone have any other idea's?

 

the turbo has nothing to do with fuel, ignition, or timing...okay lets break this down.

the turbo is not controlled by any "electronic" means. the piston moves up and down via the crankshaft pumping air basically. the turbo exhaust side is a pinwheel that helps force air into the engine because it is coupled to the intake side or "compressor" side of the turbo.

based on how fast the RPM is, a specific amount of air is flowing through the engine, being forced out the exhaust side, blowing the turbo hot side pinwheel. the compressor side will force air and fuel into the engine cylinders and be ignited by a "electronic" spark. meaning that it is electronically controlled. follow me??

once the timing is right, it will fire right on time( or should ) and power will be made. this is repeated several times a second.

IF the ignition timing is incorrect or a fault detected, it will ignite at the wrong time causing a POP or some other action.

without seeing the car, we are trying to diagnose something without all the facts available to be tested. it could be sooo minute that it may cause a chain reaction of events leading to your current end result. popping....

something is telling the computer to fire at the wrong time. loss of power tells me this. wrong timing, no more power to be made. too much fuel, delayed timing, it will ignite under sheer heat in the catalytic converter and will pop under the car or out the tailpipe.

popping under the hood, timing too advanced. valves not closed all the way resulting in a "backfire" of sorts coming through the intake pipes.

check your connections at:

cam angle sensor
fuel injectors( are they in the right order?? are they the right impedence??)
plug wires.
MAF sensor dirty?? not reading right?? honey comb messed up?? not plugged in all the way??
coil packs
do you have a coil pack amp??(hks dli II??)
intercooler pipe with a ripped coupler??


also, have you done a timing belt install?? cam angle sensor bad??

those are the things i would check. not the turbo.
good luck.

 

Update!

thanks for taking the time and posting badhabit90. i've been away for a while and couldn't reply to the thread.

i've checked
cam angle sensor
swapped plug wires
fuel injectors
swapped coil packs
swapped MAF sensor
checked and boost leak tested connections and pipes

still same issue..

Recently went back to STOCK turbo. and swapped back to everything to just before the problem occured. Car should be running right? no..still popping like crazy.

also done a compression check, perfect.

What you write makes sense badhabit90, question is what have i done to have triggered the problem, and since im back to the mods prior to the problem i should be running right..its still the same...

any ideas? anyone..

 

badhabit90 -

another weird thing is that it only happens when the engine is warm, when the car was cold is woud not make a single popping sound !

 

now that you are more comfortable in your decision about changing the turbo back, you see the "mechanical" results. didnt change anything.

hmmm....puzzling..

umm how about the timing belt?? did it skip a tooth on the exhaust side?? that may not show on the CEL, but it would show on the timing marks. pull the cover and check. you may have to pull both covers to see IF the tensioner may have gone bad as well. if it did, that may be why its only when its warm. the tensioner will allow it( the belt) to advance itself slightly in favor of the exhaust, thus the popping you may hear. check those out.