need help no boost!!!

[Trigger]

ok guys as some of you know I have been working on my car for sometime now. I got it all ready to go and I am having a couple problems. I am running a t3/t4 with a tial wastegate and i have a mechanical boost controller. no matter how i have the thing hooked up I can not get anymore then 2lbs of boost. The blowoff valve is opening but no sound is coming out but i think that is because its not making enough boost. I cant figure out the problem I am pulling a good 17lbs of vacuum at idle....thats the same the car was pulling when i got the engine and it seems to run fine on it even though i know its a little low. if anyone running the tial wastegate can tell me how they have theres hooked up maybe that would help me out. The only think i can thinking of is maybe the boost controller is bad.

The car was smoking alot...I thought it was burning oil but i lowered the idle to 1100 from 2000...some reason it kept going up there....and the smoking stopped. i am sure it was because i was getting tomuch fuel...

ok and to my other really big problem...sometimes while i am driving the car all the electrical will start going haywire and the car will turn off....i have figured out the reason the car turns off is because the coils lose power and i have traced the problem to the breaker block under the hood by the battery now all i need is someone tell me which fuse powers the coils. I cant find which one it is and my top of the fuse box is faded so bad i cant read it.

anyhelp would be great. Dee you know i thought that the car was going to have alot of lag because of the t3/t4 but my car gets up and goes fast...well til i hit 2lbs lol I cant wait to get this stuff figured out so i can drive it more...oh and to help you guys out a little this is my setup i am running right now

t3/t4tial wastegate3" exhauststock everythying else

PLEASE HELP ME SOMEONE

Tim

[Myetball]

The high idle and low vacuum probably means a vacuum leak which turns into a boost leak as you rev it up. Double check everything connected to the intake manifold, including the manifold to head seal. You should be running over 20 In.Hg of vacuum at idle.

[RMiller]

It sounds like a boost leak, with a high idle it must be after the throttle body, somewhere on the intake manifold.

[float_6969]

If you've got access to an air compressor, you might try and rig up something to pressure test the manifold....

[Trigger]

yeah i am going to do that tomorrow. myu biggest problem though is the power cutting off...I got to figure that out tomorrow too

Tim

[float_6969]

Keep us updated please. It's always helpful to see resolutions to others problems.

[Trigger]

ok i checked for vacuum leaks and didnt find any...then i checked my intake from the turbo back and found a couple boost leaks...thinking that fixed it i took it out for another spin and no luck...decided to pull the lines to the wastegate to see if its the wastegate..this should let it build unlimited boost...nope nothing....I know the turbo is spinning because i checked that...so then i notice oil seeping out from around the exhaust of the turbo (remember i said it was smoking bad) so i am waiting for it to cool down so i can pull the turbo and see if its gone bad....i can have it rebuilt here in town so im not to worried about it but it confuses me that it wouldnt boost without the wastegate...the only think i can think of it the oil was blocking the turbine wheel so maybe it was very limited to what it could do...

so with that said has anyone ever even heard of that before. and could there be anyother think making it not boost?

Tim

[Trigger]

ok turbo is not blown...just wasnt sealing very well on the hot side. i think i got that fixed but still think that the engine needs to be rebuilt (with bigger pistons ) but i drove it and still getting 2 points so tomorrow i will try a different wastegate from a friends car. oh and the electrical problem is fixed just had a loose wire at the ecu...ill keep you guys tooned into whats going on

Tim

[Trigger]

im lost i dont know what could be the problem. friday when im off I am going to take my IC off and pressure check it. maybe it has a hole in it or somethinkg.....i just dont understand....and the car still smokes i am going to try putting a stop leak in it and if that dont fix it i have to pull the turbo off again and rig up a gasket for it...I hate my life

Tim

[float_6969]

If you're not boosting with the wastegate hooked up, and you don't have any boost/vaccuum leaks, then you've either got an exhaust leak before the turbo, or the wastegate isn't closing. (same as an exhaust leak before the turbo). Since exhaust leaks are pretty obvious, I'd try a known, good wastegate and let us know what happens. Or if you want to get real crazy, pull the wastegate off, and build a block plate and put that over the opening and see what happens. I wouldn't highly reccomend that though, and you'd better be very careful. That'll tell you if it's the wastegate though...

[Trigger]

you know i think i will try a new wastegate from a friends car because the other day i took all the vacuum off the wastegate and still didnt build boost. So i am thinking maybe the wastegate isnt closing. I will know something friday with it though...I am going to try putting some lucas oil additive in to see if that will stop the small leak in the turbo...all it is that is leaking is the exhaust housing clamps down on a metal cup and that should seal it off but its not sealing it a little oil is getting out so maybe the lucas treatment will fix it...I will keep you guys informed

Tim

[Trigger]

ok about to start working on the car again...going to change the oil and put lucas additive in to hopefully stop the smoking...going to check the intercooler for leaks and the exhaust again to see if there is a leak before the turbo. if i can get it to work right then i will be installing 550cc injectors and safc2 today and maybe 300z maf if i can find a plug for it....i will get back to you guys later if anyone can think of something else to check on the no boost then let me know ok thanks

Tim

[Trigger]

well i didnt work on the boost problem today...but i did findout that my cylinders are wornout...I did a test on the and got 149,120,115,105

so time for a rebuild job...my car hates me

Tim

[RMiller]

Maybe the low compression just won't push the volume you need to spool that turbo. I couldn't build more than a few psi when running on 3 cylinders (all 4 have good compression). And that was with a T28.

[Trigger]

yeah thats a maybe....but after i posted i went out and disconnected the pipping from the turbo and from the intake and capted both off...put some air to it and found a major boost leak...so that might fix that problem...I will know tomorrow because i just dont have the time to test drive it tonight..got to change oil and **** in other cars...so if that fixes that then the electrical problem will be fixed and the boost problem...so just need to figure out the smoking and i am sure wornout cylinders are behind that....

Tim

[float_6969]

If you've got bad compression, I'll bet that is where the smoke is coming from. The Lucas will help, but you really need to replace those rings to fix it correctly. I was in the same boat as you guys...

[Trigger]

yeah i am going to test drive it in a second and see if that fixed the boost problem...if it did then i am probably going to drive it like that for a month or so, so i can save the money for the rebuild....thinking of going bigger pistons, port and polish head, metal headgasket...and boost 21lbs....oh well we will see what happens

Tim

[float_6969]

What did you get figured out?

[Trigger]

nothin the car wouldnt start...wasnt building any vacuum and it was to dark to check it out so i am about to go over there now...the car is at my parents house...

Tim

[Trigger]

car wouldnt start yesterday because of fouled out plugs...cleaned those and she fired right up... foundout that my wastegate wasnt tightened down all the way..so i fixed that and it didnt help the boost...I disconnected the wastegate to see if it would just build endless boost...and it didnt nothing...turbo is good so what it all comes down to is cylinders are tosted engine needs a rebuild...the engine must not be able to spin the turbo under a load because i also am not hearing my blowoff valve when driving....time for an overhaul....

does anyone have a hookup on pistons..i think i am going to up the engine to a 1.9 or if i can afford a stroker kit when it comes time to build it i might bump it up to a 2.0

Tim

[biosehnsucht]

I got CP Pistons from Race Engineering that were custom 84mm (1mm over) w/ 'stock' CR (flat pistons, really that raises the CR a little). Their price included the new rings..

http://www.raceeng.com, they should stock 83 and 83.5mm pistons but if you want 84mm you'll have to special order them.

[boost_boy]

You got mail, Tim.

Dee

[boost_boy]

BTW,

If you're not going to be trying to run 9's in the quarter, the stock CA pistons are up for the task. I recommend buying a fresher used engine and sort your bugs out there, before you start dumping cash into after market parts and machine work; especially if you're budgeted.

Dee

[Trigger]

im going to pull the engine on wednesday and see what kinda ware is on the cylinders.. I think i want to go back stock. I will tare down the engine and see what i need and order it...no luck today with a different wastegate and taking out the BOV dee so i dont know what it is. I am going to start with just rebuilding the engine.

Tim