Problems with turbo mx...HELP!

[hotsiit]

Hey, got some problems with my recently turbo charged mx-3 (93 SOHC 4cyl). heres the story: I got my car back after the turbo instal and tranny swap. Everything was running fine, boost was constant at 5psi, and everything was fine. I went back to college, and my dad took the car to a local shop for inspection. While at the shop, they inspected the car and replaced the water pump and timing belt. Don't know what they did, but car was overheating, wildly fluctuating idle and no throttle response...This was about 4 weeks ago and the car was still at the shop until today. The mechanic said its as good as he could get it, and my dad picked it up today. He drove it around and called me at school and told me the idle is still fluctuating bad (revs real high, and drops so low it almost stalls), and the boost gauge reads in the vacuum and at most would only boost to 1psi. (im not exactly sure if they changed anything else or what exactly they did to my car in the 4 weeks it was there)
Well, its long but thats all i know since i do not have the car in my possesion and can not look at it, i get all the info from my dad. So if anyone has ideas of what could be causeing this or what i could do i would really appreciate it.
Also, my dad is going to bring the car to me and next weekend im going to try and drive it to carlisle so if anyone with ideas wants to take a look at it they can. Thanks in advance, sory for the long post

[boostedmx]

hey man. ill be able to tell ya exactly what it is. im coming down for the show and can look at it while im there. can you take pics of numerous areas of the engine for me, maybe i can pick something out. like vacuum connections and fuel lines and the obvious. sounds like they swapped some lines or something. also take a peak at the ic hoses. if one of them came loose it will not run right and produce almost no boost. there could be a number of things it could be and ill walk through it with ya.

[natural born honda killer]

not sure on which one cause theres a lot but my bet would be on a vacuum leak when they did the inspection they probly hit a hose and knoked it off. let us know what it is when you find out.

[hotsiit]

update: car still has fluctuating idel, almost no boost pressure, and my dad told me today its hard to start,almost like it isnt getting enough gas. He doesnt know if by driving it it is causeing more damage and so im not sure if i will have the car to bring to carlisle. He is going to take it to another place (auto addictions) a performance shop and have them look at it. hopefully they can figure it out and at least make it drivable so i can bring it to carlisle, otherwise ill be putting registration sticker on myself so i can get in all 3 days of the show ....jaime, my dads going to take pics and send to you , talk to you later

[hotsiit]

well, the store / shop my dad went to doesnt do turbos, or so they say. Not sure what else to do, my dad looked at the car, be he has no idea what to even be looking for ...ok, thats about it, talk to you all later.

[dropitlikeitshot]

did u get bigger fuel injectors and some type of fuel managment.. if not that could be the problem your engine might not have enough gas to support the turbo..even if u have a upgraded fuel pump. the injectors r still spraying out gas as if u were using a stock fuel pump...well that what happened to my talon.. hey also a buddy of mine down in fl that owns a turbo shop said if your not running your car with any fuel managment r bigger injectors your probably leaning out your engine..<p>[ April 29, 2003: Message edited by: dropitlikeitshot ]</p>

[ltjrunner]

hmm ya turboed the sohc.,...got balls man! i thought about doin that but then am like ummmmm cant handle much boost....swappin!! umm yeah...you might really want to look into injectors and a standalone fuelmanagement..its pretty much a nessacity if ur turboing a car. expirienced from turboing an avenger(not the problem just what worked) so thats my advice. same as drop its like its hot pretty much. good luck with it man. one of the few if any turboed sohc's out there. good work man. let us know how it turns out.

[marshmallow15]

that is incorrect. our stock fuel systems on the sohc (rails/injectors/pump) can handle up to 85psi.. that's plenty of fuel... at stock a boosted sohc should be at around 30-40psi of fuel. i doubt its the injectors. im guessing its a leak SOMEWHERE if you're not getting any boost at all.. especially if your car isn't starting up. is it cranking or is it just clicking? is it not clicking at all? answer these questions and ill be able to help you out.

[marshmallow15]

maybe something is clogged in your rails/injectors or fuel lines or maybe a intercooler pipe is cracked or coming loose... look for any cracked pipes, especially those cracked from heat from your turbo.. or any couplings that may have come loose.

[JWMotorsports]

I can tell you from first hand experiance that the SOHC fuel injectors are to small. The retards I orginal had the motor put in by (I've redone pretty much everything they did half a$$) didn't check the B6T's injector's resistance and assumed they were low impedance injectors. So they put in the SOHC injectors and we richined the mix with the S-AFC and you couldn't give it gas pass a 1/4 throttle or it leaned out to a stumbling craw. How ever the car idled fine.<p>80PSI to the stock SOHC fuel rail is a BAD idea!!!! However even at 80 PSI it wouldn't flow as much volume of gas as the MUCH larger B6T's fuel rail at a much lower & safer pressure. The SOHC fuel rail is like a fuel straw not a fuel rail!!!

[hotsiit]

hey all, thanks for the replies. I myself havent been able to look at the car, its at my parents house. I have a walbro 190lph in-line fuel pump, vortech RRFPR, bigger injectors (330 or 440cc, i gotta double check on that), Greddy type-R BOV, spearco FMIC, 2 1/4 inch intercooler piping...I'll be able to look at the car first hand this weekend, im having the car towed to the carlisle car show. Right now, all i can do is tell my dad the information you guys tell me and have him check it out, but he's always like "i dunno"...According to my dad, to start it, you have to floor the gas and after around 20 to 25 trys itll start up...but then the idel is messed up, so you have to keep giving it gas or it will stall. Thats all i know, coming from him ...I have only seen my car once/drivin it once in about almost 5 months. Thanks again everybody for all your help and suggestions

[marshmallow15]

it SHOULD be a leak somewhere or your a/f ratio is seriously screwed up... is your maf still in your sohc? i tuned my a/f ratio that way, it's not accurate with an a/f gauge, but it helps. before my idle was screwed and it wouldn't start at all, but i discovered that when i had my new maf installed, the a/f ratio screw was all the way up, meaning too much air and not enough fuel.<p>hey jwmotor, do you know if the b6t rail and injectors fit the sohc?

[maldo]

Umm, from your pics I don't see your MAF, you need it or the car won't run. Your fuel system is fine. It will run the car but you just can't go far for power, don't listen to the crap that your injectors won't allow your car to run properly. Your car isn't under boost at startup.

[boostedmx]

i installed the system for him and everything is complete from the injectors to the pump. the maf is just before the turbo under where it used to be. it sounds like there is a pipe off or something hooked up wrong. ill be down there to inspect, please dont allow any of the
"know-it-alls" to touch the car untill i see it for myself. ill have it goin for ya in no time.

[hotsiit]

You got it jamie...I'll be there with the car sometime saturday morning and should be there all day. Yes, the MAF sensor is still there.
Boostedmx is the brains behind this operation...I'm just the oh-so-happy driver (but i am learning)
ok, well jamie, ill be on the look out for you, i also have your cell #, i think you have mine.
See everyone at carlisle