engine problem...please help!

[BWsupra97]

well i just got the car back from the shop after getting a bigger intake, change to speed density and crower stage 2 cams, springs, and retainers...

the car dynoed 402 to the wheels through the auto tranny and i thought this was ok for the mods i had considering if was 99.72 degrees in the dyno room...and will an afr of 11.8-12 at 19psi on c16...

it probably could have been better but my car does at 111xxx miles on it so i thought it was alright...

anyway driving the car on the street blows!!! the lag is absolutly horrible!...and yes its still in stock sequential mode...and i wouldnt think the cams would make it lag that much more...the second turbo doesnt come on until around 5000rpms!!! o and the first turbo makes 3-5psi until the second turbo comes on...then it goes to 17-18psi on the pump gas tune...also when just driving and making the first turbo spool up and then get off it it makes a suttle howling noise...

the first turbo only makes 3-5psi until the second turbo comes on...then it goes to around 17 on the pump gas tune...

is this caused by the cams? cuz if so that sucks

or could it be the pressure tank or the first turbo is going?

anyhelp would be great...thanks , scott

[silverz06guy]

to me it sounds like the turbo is going. the turbos love to go out on cars with those miles
if those turbos have 111xx miles on them then thats my guess.

[BWsupra97]

yea they have been in the car the entire time since it rolled out of the factory...but isnt it usually the 2nd turbo that goes first? the 2nd turbo still comes on and comes on HARD and still boosts to the correct boost...it just takes for EVER to spool up... anyone else have any other ideas?

[slither]

Id check the obvious first, boost leak. Was everything okay until the new work was done, I assume so?

[BWsupra97]

yes it was, but its really never been making the power it should be for bpu...it has 111xxx miles on it...the motor is fine tho...had a leak down test a year ago and it was fine and the compression was 155 in all cylinders about a month ago

but like it will only boost till about 3-5psi on the first turbo but then once the second turbo spools up around 5000rpm it takes off like a rocket and holds 17-18 pounds of boost all the way till redline

but now the first turbo makes a howling noise when slowing down

[HotSoup]

My car isnt making any boost now....the #1 is toast, thats for sure....its smoking pretty bad on deceleration now too....its going to be parked until I get all the parts for the single install.

Jason

[BWsupra97]

well the car just got some crower springs retainers and stage 2 cams...and the car put down 402rwhp and 374rwtq in 100 degree weather through the auto tranny which i thought was pretty decent, but then i noticed how on start up the car will spit fuel out of the exhaust and when reved black/grey smoke comes out the exhaust...now i thought this was normal since the car is getting more fuel but now im not sure...

mid 14 afr when cruising and 11.5 at wot on pump gas 17-18 psi

also my boost gauge doesnt read a consistent vacuum reading of 20 or 19 any more...it bounces all over the place at idle from 16 to 9 sometimes...

and when starting from a stop the car bogs and jerks cuz of the cams...

could this be because of the tune or is there something further that i should look into getting checked out?

also i have an oil catch tank and it came with a clear hose line to connect to the valve cover and now ive noticed that right near the valve cover the hose is starting to turn black...

can someone try and put me in the right direction?

thanks, scott

[BWsupra97]

http://videos.streetfire.net/video/a...15009b7197.htm

look at the dyno in the beginning of the video...there it looks more white/blue....could it be the valve stems? before the cams were installed this was never a problem and all of this only started after the cams were installed...could there be a leak causing the vacuum readings to get like that? and cause the smoke?

[BARTON]

For those of us that have been messing around with this stuff for a long time there is one simple rule. If it didn't do it before the last thing you did you screwed something up on the last thing you did.

If none of this happened before the cams, something is messed up in that area. AND, it is never normal to have fuel coming out the tailpipe unburned.

If you put in the cams, go back and check everything. If you didn't, get whoever did to relook at all their work. Don't go looking for a bunch of other things that could cause it. Remember, it didn't do it before the cams were put in...

Good luck!!

[SpoolnV8]

You already had cam gears rite? were they degree'd you should pull less vacuum but 9 inches is significantly less.

[F1V]

I would definately check the cam install. On a side note, maybe this has something to do with it? :

Originally Posted by BWsupra97

Age: 17

[BWsupra97]

thanks guys, but please leave my age out of this because it really has no relevance

[BWsupra97]

ok so i would just like to say sorry for all the stupid threads i made...all i wanted was some fast help and i thank the ones who did try and help anyway...sorry

and today i went to the shop and then put in a new silinoid or some peice for the #1 turbo and on the dyno the car sounded fine and both turbos sounded like they spooled up at the right times...made pretty good power for pump gas too (400.4rwhp at 17 pounds of boost) with 11.5 afr...but on the way home the car would sometimes boost normal and then other times it wouldnt and would lag a good amount... when it worked the first turbo would boost to 10 psi and then the second would come on around 3900rpm and hold boost all the way to redline...but the times when it didnt would it would just boost to like 3-4 psi and then the second turbo would come on around 4500-5000 if at all...all the vacuum lines appear to be connected and the engine is fine...so i dont know at all why it will do this... and also when the 1st turbo does not spool up right when i let off the gas it will make a howling noise, but when it spools up fine there is no noise...

does anyone have any idea what would do this? could it be the pressure tank or something like that? im really at a loss right now and cant think of what it could be...

anyone?

[Boostrush]

Originally Posted by Formula1Vendetta

I would definately check the cam install. On a side note, maybe this has something to do with it? :

I seriously doubt his being 17 has anything to do w/ the issues he's having, especially since a shop did the installation.

Howling noises from the turbo usually mean they are toast. Like Barton also said, if the issues were never a problem before the cam install, go back to the shop and have them look over it. I hope you're taking it to a shop that is familiar w/ the Supra in general and not some corner garage...

[F1V]

Originally Posted by Boostrush

Howling noises from the turbo usually mean they are toast.

Not true:

http://supraforums.com/forum/showthread.php?t=385549

[Boostrush]

^^^ why I said usually and not always, there's always an exception tot he "rule". GwailosuprA (in your link) is not having boost problems like Scott is. GwailosuprA said his boost "levels out" and the noise happens under acceleration. Scott's car will boost fine sometimes and other times it won't. His noise happens under deceleration. It's too coincidental that this only started to happen after the shop installed parts on the car.

[jdc0589]

age 17

....Guess Everyone that age in unqualified....damn.

***Please clarify exactly what 'stolenoid' was replaced.

IN GENERAL, Howling can come from:
- Dying Turbos
-Reed Valve (as in the other thread, but doesnt sound like it in your case)
-Boost Leak
- And in rare cases a malfunctioning IAC, EGC, EBV, valve/actuator/vsv

Here is what I would do:
1) recheck cams/timing. Specify all the specs on the valvetrain work you have done. The whole feul spitting thing isnt good.

2)Assuming that more than one thing went wrong ; Put it in ttc by bypassing the IAC and EGC VSV's. If it doesnt go into TTC, and/ or still boosts eraticly, let us know. If everything works fine, its a sequential system problem. This only deals with the boost/spool issue.

3) Pressure test the IAC and EGC actuators SEPERATLY, NOT by pressurizing the entire sequential system. This only deals with the boost/spool issue.

4

[BWsupra97]

thanks guys...ill get on all of this as soon as i can, but i did bring the car to the shop today and they dont SPECIALIZE in supras but they have worked on many before...they usually do evos and eclipses...they told me that the degrease in vacuum at idle was ok because the cams were so big...they leaned out the fuel today some more for cruising and its still 11.5 at WOT on the pump gas setting... now heres what i dont get and this is what really makes me think there is a problem with the sequential system... NO MATTER WHEN each turbo comes online and spools up, at redline it makes the correct boost every single time...have it be one turbo comes on at 2500 and the other at 3900 or one comes on but only at 3-4 psi and then the other comes on around 4500-5000...it still makes the same boost at the end... and i have a hunch that it is because of the lack of psi the first turbo makes sometimes that the 2nd one comes on so late...

what also leads me to beleive the car has a problem with the seq. system is that sometimes the 2nd turbo doesnt even come online when im cruising and shift down into 2nd and nail it...

i was testing this out on the way home but it was a little wet from all the rain and i didnt feel like taking a chance

and again about having the cams installed i dont see how anything like that would cause this to happen with the turbos...ill have everything pressure tested and checked as soon as i can...and in the mean while ill check the compression just to make sure the motor is ok

also i have a few questions...is 1100 egt temps to high for a bpu supra when cruising?

and recently ive noticed the tip of my boost logic exhaust is starting to turbo a goldish color...what could this be?

also i havent seen anymore smoke or liquid coming from the exhaust pipe

[jdc0589]

Originally Posted by BWsupra97

thanks guys...ill get on all of this as soon as i can, but i did bring the car to the shop today and they dont SPECIALIZE in supras but they have worked on many before...they usually do evos and eclipses...they told me that the degrease in vacuum at idle was ok because the cams were so big...they leaned out the fuel today some more for cruising and its still 11.5 at WOT on the pump gas setting... now heres what i dont get and this is what really makes me think there is a problem with the sequential system... NO MATTER WHEN each turbo comes online and spools up, at redline it makes the correct boost every single time...have it be one turbo comes on at 2500 and the other at 3900 or one comes on but only at 3-4 psi and then the other comes on around 4500-5000...it still makes the same boost at the end... and i have a hunch that it is because of the lack of psi the first turbo makes sometimes that the 2nd one comes on so late...

what also leads me to beleive the car has a problem with the seq. system is that sometimes the 2nd turbo doesnt even come online when im cruising and shift down into 2nd and nail it...


i was testing this out on the way home but it was a little wet from all the rain and i didnt feel like taking a chance

and again about having the cams installed i dont see how anything like that would cause this to happen with the turbos...ill have everything pressure tested and checked as soon as i can...and in the mean while ill check the compression just to make sure the motor is ok

also i have a few questions...is 1100 egt temps to high for a bpu supra when cruising?

and recently ive noticed the tip of my boost logic exhaust is starting to turbo a goldish color...what could this be?

also i havent seen anymore smoke or liquid coming from the exhaust pipe

Try pressure testing the seq system. Im still trying to figure out if my EGT gauge is even working corerctly. Im still fixing my seq. problem (running on #1 turbo only), the gauge is in celcius, and ive gotten to a little under 400 degrees.

[BWsupra97]

when are your egt's that temp? cuz when i just drive around normally mine are around 700-800 degrees F which is equal to yours but when i go out on the highway and cruise for a while it will go up to 1100 and no further...i made an appointment at straightline in union beach for this weekend so hopefully we find out what the problem is...if i cant figure it out this weekend and the motor checks out ok then im just going to go single this winter...im really getting sick and tired of the stock twins

[BWsupra97]

never mind...did some searching and my egt temps and my vacuum pressure (15-10 now) at idle is fine when considering what cams im running...im pretty sure my problems are within the seq. system and the stock tranny... i wont get into the tranny cuz im pretty sure its going to die soon...i can here a scratching noise from under the car at idle and engine hits the limiter sometimes at WOT before the tranny shifts and sometimes it jerks going into 2nd gear around 45mph...this i was planning on happening eventually but i will keep everyone updated on the turbo situation...

[Boostrush]

Don at Straightline knows what he's doing, so if you can't figure it out before you take it down there, I'm sure he will be able to help you get things right.

[jsantesson]

I'm having a very similar problem. Did you figure anything out? I'm in seq. mode and I'm only getting 3-5 lbs. on the first turbo. I have stock cams. It's very laggy. When the second turbo hits at 4k everything seems fine. I switched to ttc and both turbo's are spooling fine. I have an auto so ttc is too laggy for me. Anyone know what I should check? I have replaced a bunch of vacuum lines that where old. At idle I'm only seeing about 15 of vacuum. I"m not sure were to start looking. John

[jdc0589]

Originally Posted by jsantesson

I'm having a very similar problem. Did you figure anything out? I'm in seq. mode and I'm only getting 3-5 lbs. on the first turbo. I have stock cams. It's very laggy. When the second turbo hits at 4k everything seems fine. I switched to ttc and both turbo's are spooling fine. I have an auto so ttc is too laggy for me. Anyone know what I should check? I have replaced a bunch of vacuum lines that where old. At idle I'm only seeing about 15 of vacuum. I"m not sure were to start looking. John

any weird noises? even though your only getting 3-5lbs on the #1 does it hold steady or does it jump around? First thing to do is boost leak test your turbo out->intercooler->SMIC-> TB piping.

[jsantesson]

Originally Posted by twistedmethod333

any weird noises? even though your only getting 3-5lbs on the #1 does it hold steady or does it jump around? First thing to do is boost leak test your turbo out->intercooler->SMIC-> TB piping.

No weird noises. #1 does hold steady. It just feels like its not doing its job. Before this started I would get 10 psi. on the first turbo very quickly, now it is straining to hit 5 psi. I have a front mount, I checked all the pipes but I will try a boost leak test just to make sure. John