Engine/turbo Probs

[Fluroman]

Ok, heres the problem. RB20det silvertop in a 180sx, guage is reading 10psi, but doesnt feel like any boost at all, please no comments about it being a 20 as they are fine and just as good as a 25, ive had both engines and like the 20's alot.

RB20det silvertop

Microtech lt8

Stock turbo

PWR Radiator

Just jap stealth FMIC

Blitz electronic boost cont

a month or so ago, (when i bought the car) after replacing faulty coilpack, boost guage was reading 10psi, but felt slow as, checked all the usual faults, coulding find anything. then checked out turbo and there was bulk oil in dump and inlet of turbo, so put it down as the turbo being shagged, got a new stock turbo to throw on as i couldnt fine a r33 turbo to upgrade to at the time. now its doing the same thing, still got stuff all power and its reading 10psi, havnt changed the guage yet to check the guage. Although, now that i think about it, i used the same actuator from the old turbo on the new one..........

so anyway, i hooked up the wastegate to the inlet just before TB and still 10psi but slow....

The microtech is flashing error, not sure what it is as of yet, im awaiting to get time at the local shop to check it out.

any other idears i could look at, or check..

i have a compression tester, i might go do that while i await some imput. cheers thanks!

[Ultimategtr]

Split vac hose somewhere? and perhaps microtech senses that and is retarding timing to compensate? have you perhaps checked your timing using a timing light?

[Fluroman]

hey, thanks for the reply. Yes i have checked timing and set it to 15deg btdc..

as for vac hoses, ive replaced all of them with new hoses and they are all fine, it could be an error with the microtech im thinking, ill try test the wastegate somhow in 10mins or so..

[Fluroman]

just done a compression test and it isnt to bad, atleast it rules another problem out i guess.

#1 = 145

#2 = 145

#3 = 135

#4 = 145

#5 = 145

#6 = 140

[Impact]

hey sorry to thread hijack. but i think im having the same probblem?

6 months ago when i bought the car, i felt the punch wen i bootd it, but now i hear the turbo noise but dont really feel as though im going anywhere?

i dont know much about cars so any help would be nice.

what are things i can easily look for?

[Fluroman]

as far as i know

check for smoke when booting it, could have blown turbo seal...

check for vac leaks, although if you had vac leaks it wouldnt be reading whatever your full boost is

wastegate must be working if its reading to boost level

swap out your boost guage to make sure its working ok

check out your cat converter? and make sure its not blocked etc..

turn your boost controller right down and see if it changes the reading on the guage, if it does then id say ya turbo is stuffed.. if it doesnt, then your guage is buggerd maybe

[zebra]

if the microguess is flashing error codes at you...well...that is the problem...get that fixed

[Turbo 33]

hey sorry to thread hijack. but i think im having the same probblem?

6 months ago when i bought the car, i felt the punch wen i bootd it, but now i hear the turbo noise but dont really feel as though im going anywhere?

i dont know much about cars so any help would be nice.

what are things i can easily look for?

same as mine when i first got it i felt the push back in ur seat but know nothin but stills says 10 psi

[Ultimategtr]

compression results arent that bad.. it wouldnt cause your issues tho

maybe youre getting misfire??

Have you had a look at your plug condition?

what happens if you turn the boost down?

[zebra]

if the microguess is flashing error codes at you...well...that is the problem...get that fixed

Ok.

instead of looking for boost leaks etc.

Think about this -

The car starts running like crap, the thing that runs the show (Microtech) starts flashing the error light.

I wonder what the problem could be?

My advise, Stop thrashing the car untill you can sort out what the issue with the microtech is.

[Get EPIC]

same as mine when i first got it i felt the push back in ur seat but know nothin but stills says 10 psi

Its your stock ecu .Mine felt really good at first when running 10 psi but after a couple of weeks the ecu did the rich & retard thing.Ended up just getting a power fc.Maybe resetting the sock ecu will help?

[Turbo 33]

Its your stock ecu .Mine felt really good at first when running 10 psi but after a couple of weeks the ecu did the rich & retard thing.Ended up just getting a power fc.Maybe resetting the sock ecu will help?

nope resetting doesnt help

it felt insane after fitting the fmic but then it sort died off now just doesnt push me back in my seat feels sorta non turbo lol still fast but its doesnt have the push lol still sounds like the turbo is doin its job spools fine and sounds fine

[Fluroman]

if the microguess is flashing error codes at you...well...that is the problem...get that fixed

No worries, will do. I'll take it to a tuner as soon as they can fit it in and get them to look at faults. cheers.

[Fluroman]

Ok.

instead of looking for boost leaks etc.

Think about this -

The car starts running like crap, the thing that runs the show (Microtech) starts flashing the error light.

I wonder what the problem could be?

My advise, Stop thrashing the car untill you can sort out what the issue with the microtech is.

cheers, doesnt get thrased as its never driven. I'll get the tuner to check it out as soon as he can.

[Fluroman]

compression results arent that bad.. it wouldnt cause your issues tho

maybe youre getting misfire??

Have you had a look at your plug condition?

what happens if you turn the boost down?

im sure i probley am getting missfire, ive got new coilpacks on there way already. plug cond is fine, they are new. yellowish colour, which can happen from exsessive idleing etc..

[Impact]

i went for a burn turned down boost, and the guage is workn as the lvl was lowerd..

theres no smoke on startup.

i have standard ecu, tried a reset. workd on at the start. then started lagg. would boot it, nothin nothing then bam.

now its back to jus not much at all.

so maybe i need a new ecu? piggy back or something?

[Impact]

also lookd at my spark plugs.. some of them were sittin in a small pool of oil :S wtf lol

and no i didnt spill any when i did the last change

[Krishy]

i went for a burn turned down boost, and the guage is workn as the lvl was lowerd..

theres no smoke on startup.

i have standard ecu, tried a reset. workd on at the start. then started lagg. would boot it, nothin nothing then bam.

now its back to jus not much at all.

so maybe i need a new ecu? piggy back or something?

Sometimes when you reset the ECU it needs to relearn itself again....i had the same prob and after taking it easy for the 1's 500kms and then giving it a bit in the 2nd 500kms....it was fine after that.....so maybe just let it relearn itself mate

[Fluroman]

well, car is going to tuner thursday to look at what the error's are. i just went for another drive, put some grease on the wastegate shaft and it didnt get messed up at all, looks exactly the same. car boosted to 10psi, no boost controller just hooked up to inlet. so the actuator arm isnt moving but its boosting to 10psi? im pretty sure it must be another shagged turbo cause it spools loud and wastegate noose is alot louder than my old stock turbo.