s13 RB25DET, Stoped, was running. PLEASE HELP!

[mattleegee]

i dont know im having problems and they are almost exact opposite

maybe since people are in here already i could get some help, or even from you ... haha

first start upwent ok, kept bogging down when trying to rev, adjusted fuel pressure

second start upmotor got loud, thought something spun or got thrown,

Third start upended up the help i got on here was incorrect and got my wastegate off the resirc systemwith both plugged motor sounded almost new

sitting at about 14.5 a/f at idle when revved when rich as hell, like below 8

fourth start upcannot even hold idle, bogs out and dies

fifth start uptook off maf, no start

now im drinking and searching

gl fibre, i have been watching this hopeing it would help me, my starts are over a week or two time, it has to be a leak but i went over every dang coupler on my system.... ordering some 2.5" 403 SS to make custom one piece intercooler pipes now...

[rb25det250sx]

fibre... it could be that your ECU took a s*** but i dont think the motor would even rev or try to start if your ecu is bad... i might have a extra ecu laying around that i could send you to see if that is the problem. what series you have? Still not sure if I have one. i'll look tonight when i get home.

[rb25det250sx]

matt... readjust your fuel pressure and see if that helps.. if not are your injectors too big for your setup?

[Fibre guy]

PROBLEM FIXED! Well when the problem first happened, one of the first things I did was check the couplers they all looked sealed and fine.Wellll, I was wrong, when I was taking another look at the TPS i revved it a little and heard a little odd hissing sound. So I looked behind the bumper, and behold, a hair line distance between the couplers that I didn't notice before. The hose clamp I used (didn't have any more t-clamps left) broke apart. Put it back together with another hose clamp and vroom vroom. Took it for a test drive and its back to being a rocket on wheels! I was even about to buy haltech's ps2000 ecu for a $.75 problem. Thanks for everyone's help! (not sarcasm)

FOR mattleegee What do you mean: "got my wastegate off the resirc system with both plugged"I found out with the MAF unplugging it lets it go into a rough idle mode, so it's not the MAF sensor.The consult helped me get rid of lots of possibilities and narrowed it down.Probably already tried but here: I'd try spraying some starter fluid to leak possible areas.Does it start with the gas peddle mashed down?Fuel pressure lines could be reversed... It happens...Gap spark plugs correctly?

[mattleegee]

i have stock injectors (rb5det s1 FMIC, apexi intake, and Nismo FPR all the rest stock)i ended up retightening all the intercooler clamps and that seemed to help, i ran for about 10-15mins today and it went pretty good, i made it idle higher (1050rpm maybe compared to 850rpm) by adjusting the IAC.

The a/f meter wont sit still, it kinda sits still when i hold gas up to 1300rpm(please note j30 tach installed just going by the numbers it gives me)

Maybe try to get a good a/f by tuning the FPR? Set to 42 with vacuum off and at idle it sits at about 40 (wahlbro pump, Nismo FPR, stock injectors)

Is it normal to hear a "click" when you first press the gas pedal?

[mattleegee]

Fibre read my new post above, new stuffs, im glad you figured it out!FOR mattleegee What do you mean: "got my wastegate off the resirc system with both plugged"WG+carbon canister+ventalation system where all hooked toghterI found out with the MAF unplugging it lets it go into a rough idle mode, so it's not the MAF sensor.The consult helped me get rid of lots of possibilities and narrowed it down.Probably already tried but here: I'd try spraying some starter fluid to leak possible areas.Does it start with the gas peddle mashed down?Never tried, it starts up no problem nowFuel pressure lines could be reversed... It happens...Already put them the wrong way and switched .... hahaGap spark plugs correctly?I dunno, there doesnt seem to be a correct number i have found, i did 0.8 or whatever out of the FSM

[Fibre guy]

It happens was a personal experience. Can't help you with WG, I have an external one.When I press the gas I don't hear a clicking noise. With a synapse BOV recirculated into the intake, via awesome bendable spa hose, I hear a quick phsht noise with it shutting and the loud suction noise . If it's not the stock bypass valve shutting, Maybe click is good place to start?There is also a little screw on the throttle body that bumps the idle. O2 extension wires maybe mixed?Timing *15?Does it sound like its missing at all?

[rb25det250sx]

fibre glad you figured it out... as for matt Fuel pressure is suppose to read 52..

I wouldnt use a A/f gauge unless it was a wideband.. those regular gauges that reads off of the stock o2 sensor dont read right.

[rb25det250sx]

matt....my car clicks like that too when i first pushed the pedle.. thought it was normal, or just my custom bracket i had to make.. but not so sure now.

[USMCgetsome]

fuel pressure is 43 with vac off then put vac back on and let it sit where it sits. No more adjustments needed.

[Fibre guy]

Kullin is right 43psi vac off. On a side note anyone here have a good aeromotive or equal 1:1 ratio FPR?Also, check anything in the $.75 area, those tend to really stick it to ya. Refer to illustration below: $.75> <you

[mattleegee]

fibre glad you figured it out... as for matt Fuel pressure is suppose to read 52..

I wouldnt use a A/f gauge unless it was a wideband.. those regular gauges that reads off of the stock o2 sensor dont read right.

its a greddy a/f, it came with its own o2 so now i have two of them

anyone else know of the "click" when you first press down the pedle?

[rb25det250sx]

okay..so thats a wide band.

yeah please anyone help on the click when you first press the pedal down.

[jey_253]

click is vvt ;}

[mattleegee]

^ nice

I took my car out today!!!! woohhooo!

It ran pretty smooth besides all the tools in the interior flopping around in a carpetless body

One problem im having now is a rough start, i got to gas it to get it to go or it stumbles dead! But once started idles nicely

Any ideas?I was playing with the CAS but i moved it back to original spot and still problems, i need to set up my appointment now for the pocket draining ECU and tune arggghhhhh

[rb25det250sx]

click is vvt ;}

what is VVT?

[Fibre guy]

VVT or variable valve timing, adjusts the intake cam to better suit higher rpms while still maintaining good fuel economy and low end HP. Versus a normal cam that only has a set rpm range. It's why the intake cam has a different front than the exhaust.