HELP ME!! im fed up with it...

[PrjctFlat]

ok, here i am...new motor with less than 60k, stock internals, cometic head gasket, big 16g, stainless manifold, 3" turbo back exhaust, stock injectors, stock sidemount (for now, front mount needs to be plumbed), bigger fuel rail, stock regulator, 255 pump, afc with 2g maf, i cant get it to tune right...no matter what i do it seems rich, then when i finally get into boost on hi setting it leans out and i get knock...i dont have a dsmlink or any logger but i know its there because i feel it and i hear it...i cant get rid of it...and it is hooked up right and everything. is it my fpr getting pushed to the limit? i cant get it to run right...also this is the 4th time ive had this thing jump time on me...and i dont know if it bent the valves again yet or not, i just got done gettin the valves replaced from the last time it jumped time... i got fed up with it...its been a year project and 6 grand so far...and im just gettin to my limits...im sure everybody knows what im goin through...if you do...you need to help me, im just stumped and i dont want to stop this hobby...i love it, and i love dsm's... any help would be greatly appreciated. if you have anymore questions that i may have not answered in this original post then ask me...ill be glad to tell yo uanything that would help me figure this out..thanks in advanced.
-Ryan

 

[Talesin]

If you're running a Walbro 255 with the stock FPR, yes, it's being overrun. You're getting WAY high fuel pressure (mine was at 46psi with vac) and tune based on that non-standard baseline, which is ridiculously rich at the bottom end. You'll need an AFPR.. most use an Aeromotive. Figure around $200 for a kit. I grabbed mine from Import Evolution.

Also, if you're going to tune, you'll need a logger. Otherwise it's a lot like running through a cutlery store in the dark. One wrong step, and you'll be hurting pretty bad. Seriously, you can pick up an ODBI cable on eBay for $30 or less, then just run Tunerstein or Palm'n'Stein.

 

[GVR4592]

A datalogger should be everybodies first modification, upgrade, addition or whatever you want to call it. You cannot tune any car without some sort of datalogger. Wether it be a Palm based logger, Dsmlink, Aem, or a wideband and some det cans.

If I was in your shoes, I would put the stock maf sensor back on, set the boost to stock level, set the safc at 0 and wait until you can afford the datalogger and fuel pressure regulator. Otherwise you are just creating more stress for yourself and causing damage to your engine.

Who's doing your timing belts? Something is not being done correctly if it keeps jumping. Have you checked and/or replaced the hydraulic tensioner and the tensioner pulley? Are you using a new belt every time? Are the balance shafts removed?

 

[PrjctFlat]

thanks, i guess ill just have to spend more money....no the balance shafts are still in, the timing belt is brand new, i just put in this motor with 60K on it and replaced the belt, the tensioner is the stock 60K one, i guess i should replace that...but it jumped time after i got it together, took it apart and got the valves replaced then got it running, thats where i ran into the rich problems...then when i got a cel light for the csp sensor, i checked it, re-installed it, then tried starting it again and it jumped...i havent gotten to check anything out except when i heard it i immediatly turned it off and jacked the car up and turned the motor with a 1/2" ratchet and sure enough it touched...it just stops...so thats all i know now...i do have a FPR but had trouble gettin it to seal on the new fuel rail and i used the stock one...thats when i thought that it was getting maxed out by the 255...