keep hitting some sort of cut out that i really dont like

[sdtouge]

ok, so since ive owned the engine when flooring it sometimes i hit some sort of cut out. it seems to happen and im over it when im at events trying to drift then all of suuden i have 0 (not exagertaing)hp

it only happens at WOT and in boost, what will happen is, i think only at full boost, was like 8.5 psi now i monev the vauum line due to me using the stock cold pipe again to the throttle body, so nows its aomst 10.so i will get above like 4500 then stop!. i cant rev it at all. i will floor it and nothing, i need to completley take my foot off the gas for like 6 seconds, or iif i put it in nuetral, the engine will only idle, even if i gas it, until this stops.

i has asking many people about it over hte weekend, some people thought it could be someosrt of missfire becuase my car shakes at idle somewhat so one at a time i unplugged my coilpacks while the engine was rnning and noticed the engine would get worse, so sprk is ok. then i changed around the number 2 and 3 clips for the injectors, since i heard about some peopel having them backwards. no help at all.

so i noticed a tiny leak in my intercooler piping, so i am in the process of replacing it right now, then i am also gonna try and tune down the boost i am at 10 psi right now, but i dont have a boost controller, i think its because my wastegate line is on my throtle body and i dont know why else.

so if anyone has any ideas that would be great, oh i am still not getting any codes, and i am not shure if the boost sensor thing is pluged in, i dont even know if i have one.

so comments and suggestiuons would be great, i have another event this weekend i would like my car to be 100% for since it is 3 hours away frmo here.

thanks againmatt

[sdtouge]

also, when i say it wont let me rev, its not that its stumbling, its like the ecu acts like im not giving it gas....

[originalsin]

boost cut?

[boost_boy]

also, when i say it wont let me rev, its not that its stumbling, its like the ecu acts like im not giving it gas....

Hmmm, after reading this issue of yours good, I would definitely suggest you check your fuel pressure regulator. And if were you, I would not let the ecu control my fuel pump. Ihaven't pulled that stunt in many years, but I used to get my running 12 volt source from the fuse box and not from the ecu because the ecu has the ability to add/subtract voltage to the fuel pump. Look at the FSM if you want to try this, but you sound like you're having fuel run-out issues which would make me suspect the regulator if you've already installed a stronger fuel pump. Good luck..........

Dee

[c-rad]

Hmmm, after reading this issue of yours good, I would definitely suggest you check your fuel pressure regulator. And if were you, I would not let the ecu control my fuel pump. Ihaven't pulled that stunt in many years, but I used to get my running 12 volt source from the fuse box and not from the ecu because the ecu has the ability to add/subtract voltage to the fuel pump. Look at the FSM if you want to try this, but you sound like you're having fuel run-out issues which would make me suspect the regulator if you've already installed a stronger fuel pump. Good luck..........

Dee

I did this on my DSM... run a 10-gauge wire from the + terminal back to an automotive relay next to the pump. Then use the factory power source to the pump to the switched terminal on the relay. Easy way to get a consistent 14v to the fuel pump.

[sdtouge]

i am using stock fuel pump, becuase my engine is pretty much stock. filter sr t25, sr smic and enjuku hot pipe and exhaust

after i am done with this, if my problem still happens, which i think it will, i will try that with the fuel pump. hopefully that will be it, then just throw in a new fpr

[sdtouge]

ok so i went and got electrical cleaner and cleaned out my maf, tps, injectors etc, then also i noticed my knock sensor fell off lol, so i went out again and it hasnt cut me out yet. today i installed a new fuel pump and im wiring it straight to my battery, the power for it is the white and purple so im just researchiung the fsm a little bit more.thanks everyone.

also, if anyone has a spare knock sensor plug for sale, with some wire preferable mine is all cracked and doesnt wanna stay on.

i think the probelm was my know sensor getting a little loose or somthing liek that.

[sdtouge]

i know the pwoer for the pump is the white and purple wire, but when i try to s[lice the new wire to the battery it was on constatnly, i have looked everywhere in the fsm and i couldnt find out what wires do what for the fuel pump, so if any one can help me out and tell me or even jsut point me in the right section/susection that would be rad.

[ca18detdrift]

Hello Matt, I met you over the week end at the just drift event in willow springs. I just realized this was the forum you were talking about. So have you figured out your problem yet, or are you still working on it? I noticed you still had this problem during the event.

[undertaker]

Hook your battery feed up to a relay and use the switched power supply to the pump to trigger the relay. If you need more info search for 'fuel pump re-wire' on the net.

[sdtouge]

ok i just figured this out sitting at my computer

well, my fpr vacuum line was from those 4 under/behind intake mani (the removable bracket, now removed lol) but it never actually goes to the intake mani, and one side of mine was completely teed off, so the fpr was see 0psi at all times, so it would run rich at low vacuumm etc (poosible cause of bad mpg) then lean at boost (giving the motor fuel sufficient for 0psi when i was at 8) etc

im hoping this was my problem, so when i fix this along with wire up the fuel pump to a automotive realy hoping when i get her back in after the rebuild that no more cut out!!!

[float_6969]

If the FPR really was not seeing any vac or boost you could have caused some serious damage to the motor. Are you loosing/burnging any oil? Are you getting a lot of blow by? The motor was probabally leaning out constantly. Do you not have an AFR gauge of some sort?

[sdtouge]

no afr gauge, i had alot of blow by lol. the motor right now i am rebuilding it, its currently at the machine shop. i was wondering why i didnt see a change at all when i unpluged the vacuum line to the fpr. hopefully this was my problem since i wasnt throwing any codes i beleive it was something mechanical but who knows.