symptoms
 

97 gsx 7 bolt

car boggs down under boost.
i usually hit 15 psi and eventualy does the t-25 thing and starts to fall off. but now as soon as i go into boost it feels like it is boggin down. my plugs were fouled so i got new ones ran great for a minute then boom , its doing it again. now i cant even get 5 psi before it bogs down. plugs are fouled again , sorta.

the only mods i have is a full 3 inch exhaust. i do have a slight exhaust leak at the down pipe ( dwn pipe meets 02 housing.) but this has been for a month now with no effect.
the rear o2 sensor has just got changed. the cel light is on but for p1105-fpsolinoid-which only comes into play during cold starts.

i have pulled the stock uic pipe off and felt inside for oil. there is none and all of the pipes are snugg. didnt feel like any hoes or rips. i felt the car up a week prior so i dont believe that its gas either. the car does seem to smell like its rich but that could be from the exhaust leak

please dont tell me to take it to the brothers or jerry just yet. i live an hour and a half away. i would like to try yalls ideals first.nothing personal.




could it be the fuel pressure regulator or a seized injector ?
please help me ?!?!?!?!?

Have you done anything to tune the car? My 1st guess would be the FPR. Is it a 1:1 or something higher? You may also want to check to see if the diaphram (SP?) is ripped inside the FPR. What size injectors do you have and how old/used are they? Have you checked for fuel leaks? Remember my car when we were changing the motor mounts. It might not be as bad as mine was but you may have a little slit somewhere.

Also pull the CEL code. Since yours turned on before from a different issue, it may still be adding codes stating you are running to rich or lean since then and you wont know it.

this is a 4g63 motor and it is bone stock. there is no tune done to the the car other than stock.

Crankwalk!








































OK, I just had to do it. Did you check for the boost leaks? Did you check your plugs/plug wires?

yes i did look for boost leaks and i boughtr new plugs. did not buy new wires. wouldnt bad wires produce a ruff idle ?

checked a second time no leaks i checked every intercooler pipe on this car

sounds like the problem im having, when you shift do you hear your bov at all?

yes , i am building boost though

How did you check for boost leaks?

i have stock piping , so i took it all off and inspected it 3 times now by very closely. its only two pipes.