Alright.. quick run down!

replaced complete throttle body with tps

Injectors (secondary)

spark plug wires

Coils



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car still bogging i went to the shop and did the diagns and got the code 73. (rear injector) so i replaced it.. and still bogging my connectors to the injectors were busted!! so i got them to fit right.!! thought it would be a loose connection but yeah anyways still bogging at 0 psi. pissing me off making me want to sell the F&*%^&$ thing.! anyways any ideas ?

its a jdm so there's no check engine light?? I used this code reader from SNAP on at the shop thats how i got the code 73.

oh and i'm running non seq. turbos!

its limp mode so i know that. now whats causing this i dunn.!!

this has been goin on for 3 wks now!!! sometimes resettin the Ecu would work, but not anymore!

I've read pretty much every single post about "limp mode" and all that! everyday at least hrs reading and still nothing!!
i'm running out of options and sht to do here!

""""""""""""""""ONLY THING I HAVEN'T CHANGED WAS THE SPARK PLUGS"""""""""""""""" i GOT GREDDY AND NGK ON RIGHT NOW they look okya i guess! thats the only thing i haven't changed. and i think i'm about to do that in a bit and see how it goes.. i'll keep yall updated!
thanks

 

Try switching out to a single turbo and eliminate most of the vacuum crap, which may simplify the troubleshooting. I dunno much more than that. Sure does sound aggravating though!

 

I can't wait to do that, but i'm about to change the plugs in a little bit i'll be back and keep ths updated!
...

 

Replaced my old greddy plugs with new NGK's still running like POOP!

 

have you checked all of the intercooler pipes? one at the "Y" pipe often blows. What about your vacuum lines? I guess there are a few things this could be but I would start there. maybe check the continuity between the injector plug's and the ecu?

 

Boost leak was one of the first things i checked for ....... and same thing with the vacum lines! all connected and the injectors/ spark plugs were replaced earlier like i mentioned. ahh F&*(%&$#@ rotary motors!! its my 5th FD and never had something like this before! tomorrow i'm heading to my friends shop and i'll use the snap on code reader that he has to see what code is going to pop up! .

 

if you stab the throttle -like, quickly floor the throttle- does it rev up?

i have been having this same problem on the stock ECU, and it seems like the secondary injectors don't come on AT ALL.
also, if i am reving the engine up at light throttle, if i just floor the gas, its like the injectors just turn off and the engine will die. if i hold the gas pedal on the floor for a second and left off before the car completely dies, it will backfire very loudly. i have no clue what is causing it.

this seems to be an intermittent problem too. this is the third time my car has gone into this mode, and it seems like it does it for about a week, then stops... I am going to change my fuel filter too, as i'm sure its been a LONG time since it's been changed...

 

Usually a backfire like that is unburnt fuel being ignited in your exhaust. Check all your grounds that go to your fuel rails or injectors.

If you are planning on changing the fuel filter it might be helpful to be a contortionist or just drop the rear differential. It took me a few hours to change mine and that was even at my friends shop, because of where it's located under the rear diff.

 

yeah well pretty much the same thing.!! I can rev up all the way to red line but if I floor it and hold it it will pop/back fire it...... I guess that when i replaced the injectors and the plugs i didn't reset the damn thing the right way by stepping on the brakes and all!.. i just did it again about a 1hr and half ago and drove for about 30 miles... did turn off the car about 4-5 times and seems to be fine now!!! tomorrow or tuesday i'm going to the shop to check for codes with the scanner!! hopefully i wont be getting anything!! well see!

 

This is the same thing I'm having with both my FD. I did a non-squential and eliminate the rats nest. I can only rev no more than half throttle and if more the car backfire. I pulled the engine code and both FD reads 11 (omp sensor) . I installed the PFC the car runs great.

 

hey i have the same problem. non seq turbos cant get anyboost outta them. in neutral i can rev to the redline but it doesnt build any boost. while drive WOT or any boost just makes the car backfire and bog. its like hitting a wall. the only thing different about my case is that i have a pfc. ive read that its my secondary injectors but they were just cleaned i think it may be my harness im gonna check later.

 

well check for codes even though your check engine is not on. IF you done that already go make sure that your injectors plug are on correctly.!! get a screw driver and push them a lil more just to make sure. that way you dont have to start taking anything appart if its just that!!

PS: doesn't the pfc tells you if there's something wrong?? specially if its the injectors? thought it did!..

 

Well just to keep you guys updated my car is running good now!! Iam assuming that after i did all that I didn't reset the ecu the propper way ( by holding the brakes and blablbala) even thought the NEGATIVE cable was off the whole time working on the car!) anyways Tuesd i'm heading to the shop to change my wheels anyways so since Ima be there i'll be checking for Any codes!!

 

Ha, what luck, my car was also in limp mode last week, took it to Ricks and he installed an OMP...

 

fk, last time i took my car ther! (2 yrs. ago) they wanted $900 to replace the PFD. LOL took it to one of my boys $300

now i can actually do all the work on the car my self!!! gotta learn one day!!

*this morning the car was hesitating a lil under boost. it was sputtering a little then after warming up a lil I got on the gas for a sec kind like forcing it to boost and it went away NO MORE!

so far so good with my car!! I guess I just needed to reset the ECU the right way after replacing the injectors! couple days ago! funny thing was that the battery cable was off the whole time i was working on the car. that should've done it but i dunno!! but now i, hold that brake pedal down for a min. Anyways
just wating for damn UPS to get here with my wheels and i'm heading to the shop to do all the crap i need to! (new wheels, and check for codes again!) i'm just paranoid but hey who wouldn't!

 

Here's an Update, this morning after i left the house the car was boggin a little then i forced it (stepped on it and seem ) went away. turned it off and went into limp mode when i started I tried resettin the ecu and nothing.. then before i got to the shop i did it again it worked got here ran the SNap on code reader! and NO CODES!! started the car and no problem..... stupid Limp mode!!! well only thing to do now is take it to a Proffecional (real mechanic)...

more money going away!

in the future who ever finds them selvs dealing with this.

check the following before taking it to a mechanic (thats if you know what you're doing )
first of thing to do.

CHECK ENGINE LIGHT ( even if its no on, check for codes)
*spark plugs (could be faul)
*TPS ( out of range, incorrect readings)
*spark plug wires (too old, check connections)
*coils (make sure the plugs are on there correctly and connectors or tight on)
*Ground (check for loose wires)
*Map sensor ( make sure the vacum line is connected)
*Injectors (connectors could be loose, bad injector)
*OMP- could be bad or loose connector


just thought it could help instead of reading every freaking post like i did!!
so just thought it could help some 1 someday!

 

i love the standard "check your grounds" response when people have no idea what's wrong with an engine.


"hey man, i have no idea what's wrong with my car. it backfires, bucks like crazy, is probably homosexual, and sounds like stampeding elephant when i try to go into boost."

"aww, dude! did you check the grounds?"

"yeah dude i checked the grounds!

"aw dude, u better check the grounds again, bro."

"aw heck! ayt playa. stay up."

 

I think the "ground" should be the #1 on the list lol