boosting and bogging???

[SignalAutodrifter_D]

ok guys after all this time i have finally got my car up and running again...and it is way better then before..

new side mount
new manifold
new turbo elbow
new turbo lines
new wheels
new brakes

i finally got everything bolted on today and im driving it and when i go full throttle it bogs...and wont goo dat fast..but i hear the blow off valve going off so i think im boosting.....

umm when i step on the pedal half way.....and slowly very slowly keep pressing further the car goes faster but that is the only way...if i slamm on the gas...it jus bogsss

i check my lines for leaks in hoses and stuff like dat ...i tighten alot of things down...and tried driving it again..and same thing....

what do you guys think could be the problem?????

(and yes i am the guy that blew like 3 turbos..but hopefuully this is the last one)

[Yoshi]

u "think" you're boosting?

dude, they make gauges for the specific purpose of monitoring your car's vitals.... helpful for tuning and troubleshooting I've heard too... but that's just here-say ;)

Seriously, 3 turbos? Please tell me that you're just leaving out your gauge readings...

[sr240mike]

Sounds like a boost leak, possibly from the bov. Maybe block it off and see if it still occurs.

[SignalAutodrifter_D]

ok i got boost...and im boosting and i get the pull..but now it lags....

when i step on the gas pedal ...it would be like a second before i start to pull.....wut u think now???

[ASLOSR]

Sounds like you are running rich. But I have nothing to go on.

[SignalAutodrifter_D]

yea alot of people hav been telling me im running rich...so that might be it...i have a walbro fuel pump so that might be it...but how do i corrected it???

and i smell gas ..no leaks but i can smell...is that another sympton??

[Goinsleeper]

are you monitoring anything? you didnt just slap a bunch of stuff on your car and drive did you? do you have a FPR?

[SignalAutodrifter_D]

ok well the deal is i got an sr and i just wanted to run it stock...cause i like that motor and i had no money to hook up the motor...so running it stock wit side mount and everything is what i was after...but the turbo came blown on the motor.....

i was in a rush to get the motor running so i can drive it so i picked up a turbo from my buddy a t28 wit a s15 actuator....well bolting that on i overboosted and blew it...but it did run for like a day or so....

then i took that out and just bolted another t25 on there ..but changing the turbo for the third time i crimped up the lines and i guess i starved it from fluids so that went....

since the motor has been sitting there i picked up all the new goodies cause i dint want blow my turbo again.....well the setup i have now its been running for three days so thats the longest out of all the turbos...but it jus has that problem ..when i boost...it takes a second before it starts to gooo....

im trying to monitor my motor....but not having enough money sucks..cause gauges cost money..

and what is an FPR???

[TheSnail]

Fuel Pressure Regulator

[Dousan_PG]

could be boost leak
i had same problem
it was a fucking coilpack that died..out of the blue
picking up another for free tomorrow and a backup for 10 bucks
boost normal then. aah finally
i tested EVERYTHING. changed MAFS wiring all over car, injector change, ignitor chip.....etc etc...a coilpack, so easy to fix. d'oh!

[TheSnail]

Did you buy new spark plugs? If so, which ones?

[sr20tom]

After my second swap into the new shell, my car did exactly what you are telling us. Two main reasons that i found out the hard way by getting my car towed of the road. One i had the same thing and the stock fuel pump shat on me and before it died, it ran fine not full throttle and bogged when i guned it. Then after 2 weeks of SR injectors it died so i am pretty sure its your fuel. If not check and tripple check all your boost piping.

[Var]

I dunno why everyone thinks running a 255lph walboro will make you run rich, it will NOT. You smell fuel, do you have an exhaust leak or fuel leak??

[TheSnail]

I don’t think the walboro has any thing to do with but for fuel related things I believe its nor the fuel filter or fpr, fuel tank. fpr's rarely crap out so you can do that one last. Do the fuel filter first, then before you change the gas tank (was the prob on 3 of my cars) pull the fuel pump out and check the fuel pump filter. If the filter is brown, change the gas tank. Check the spark plugs tell us what color they are, tell us the ones you have, if you bought new ones check and tell us the type and heat range, or just give us the serial #'s. Make sure the knock sensor or plug is connected. Clean the Maf with TB cleaner. Check your timing. Has anyone or you pulled out your CAS?

Her is the list what I would do first if I was in your place.

The easiest first.

1. Sparkplugs, examine them, you can learn a lot from just the color of them
2. Clean Maf and check the knock sensor
3. Check timing with a timing light.
4. If the plugs are white, check fuel filter first, then fuel filter to see if you need a fuel tank, then
a fuel pressure gauge to check your FPR.
5. If the plugs are white(part 2) clean the maf with tb cleaner.
6. If everything is fine, make sure nobody f’ed with your CAS, or your too advanced.
7. If your hear any exhaust leaks, make sure its not coming from the exhaust manifold to turbo gasket, or engine to exhaust manifold gasket. All other exhaust leaks will have none of your problems, but just spike boost.


Do this first, from whatever seams easiest to you, then let us know.

[SignalAutodrifter_D]

ok i got new spark plugs and they are NGK iridiums....and i dint gap them....i checked for boost leaks about three times and i cant seem to find anything.....

if it is a coil pack that went out how would i know that....???i checked for fuel leak and i dont see that either...but occasionally i smelll gas....

ok what im goin to do on monday is follow the list.....thanks for that snail..and i hope u can help me through this!! i apprecieate it..its been awhile since my car has even ran like this...

what i have to say is that...when i had my t28 on there..when i boosted it was nice....it spooled quik but probably cause it was ball bearing....but i think..my spark plugs should be ok...may be its something to do with the fuel.....system....so i will check the fuel pump and fuel filter.....im gonna slide down the exaust and turbo system and look for leaks.....i dont think anything is wrong wit my coil packs either....

but what do you mean i have to replace fuel tank....u mean like the whole dam thing????

um the only reason i kno sumthing mite be really wrong is because i have drivin an sr and the boost response is not that slow.......when i step on it..it jumps and pauses for a second....then boost and its not even a full power pulll! but if i step on the gas half way and lightly start applying presure..then it will soon started increasing in speed......

thanks for all your help guys..i will check all that and i will let u kno..please keep helping!!

[SignalAutodrifter_D]

if there is a lil leak where my manifold and turbo meet..would this happen...cause i am missing one bolt there...

[Dousan_PG]

mine did same thing exactly same thing
apply pressure on pedal hard backfire and pop and drop in and out of boost
apply pressure slowly would go into boost slowly and increase speed and such

i had a dead coilpack
i swapped packs with my friends SR, car ran PERFECT
so slowly swapped mine back one by one until i found the dead one
looked good by eye site but i guess inside was all fucked up
so picked up a couple used ones for free from a friends shops and now car runs tip top. did some mountain driving last night, WOW so nice to have POWER again.
so today continue w/ upgrades and put injectords back in hookboost controller back up swap plus and putmy z32 mafs back on! 250ish hp (s14 sr) coming now hah..wow i cant wait.

[TheSnail]

If you dont have a Fuel pressure gauge, Pinch the return line to almost closed to bump the fuel pressure. Take it for a spin around the block and see if that helps. If it cures your problem then its a fuel pressure issue. Also while your at it, pull off the vaccume hose that goes from your stock FPR to the manifold. Pull it off at the fpr, and first check to see if it is dry and does not have a gas coating in the inside. Secound, turn on the motor with it disconected and put your finger to the end of the hose to make sure its getting vaccume. Check for any holes in the line. Third, with the engine off, conect the line back to the FPR, and disconect the Vaccume line at the manifold and suck on the line. You should not be able to suck any air or gas out of it.

Though it may seem like a long prosses, it will only take 10min of your time. The exhaust to manifold thing you should take care off. See if you can see the t25 flange at the visible three coners. If any bit of area is black or a chunck of gasket is missing (common problem). Then you need to replace the gasket, as well as get the 4rth bolt. Turn on the car and check for exhaust leaks around the area. If you cant hear an exhaust leak, give it 2/3rds gas pretty fast (dont hold it at 2/3rds) and listen for a leak aroundf the gasket, rather then slowly reaching an rpm. Kind of like quickly reving up at the stoplight. This is because, at idle the leak is not bad, but under load, the more resistance the more of an exhaust leak you have.

Is the problem worse when you go up hills?

Thanks, Snail

[Crono562]

Hey I had the same problem as you. Dousan probably can attest to it (posted in nadine's board). I did everything that the guys have told you so far and it still was wasnt working.

-Checked voltage to fuel pump (its a denso)
-Replaced fuel filter
-Replaced FPR
-Replaced MAFs
-Replaced Acuator to throttle body line
-Checked firing of coil packs
-Checked timing of fuel injectors

And the problem was still there.

I do have a boost gauge which was able to help a lot. Basically if i was light on the throttle the car would accerlate fine, but if ur light on the throttle the turbo wont spool fully. Basically I found out (with the help of my gauge) that the choking and bogging coincided with when my boost hit full psi (.5 bar or 8 psi).

So we found out it was a problem with the wastegate. When psi hits full, the acuator opens the gate and lets the excess air off. But mine wasnt opening fully and so as a result wasnt letting the air off fast enough. Basically the psi would spike and then the gate would open more, but then the psi would drop and it would partially close. So when my gauge hit .5 , the needle would jump back and forth (from like .4 to .6) really fast.

When u take your turbo off to check the gaskets, check your acutuator and gate flap. Make sure its all functioning properly. You might have the same problem as me.

[SignalAutodrifter_D]

ok ...now out of all the problems...i was starting to think it might be the coil pack situation..untill my man with the last post came on.....

out of what he said about the door..i think that might be it.because when i was bolting the turbo on..the fins and everything spun great and i was happy..it looked very nice and in good working shape...but the door when it was opening all the way...it was kinda stuck just a lil bit only when it was opened all the way....i thought it was just because i dint have everything hooked up and yet...so that might be it......

well is it ok for me to drive the car now without boosting it???
and does this mean i have to take everything back out again....and change the turbo??
or should i go through all those trouble shooting ideas first and if it dont work take the turbo out????

thanks guys.

[DoriftoSlut]

actuator problems will cause spiking often, thats why i never consideredit on mine, NEVER spiked.

do what snail says
i check my feul pressure too
and get another coilpack or borrow one from a friend to test. takes 10 mins to test them all.

[Crono562]

Do the other troubleshooting steps first and save taking the turbo off for last because that one is a lot more work and sort of like worse case scenario. Careful driving it though cuz if it is a gate problem and you keep running the car with it you might blow a seal and get a leak like i did. One day i headed out and my gauge wouldnt go past 0 psi, sure enough i popped the hood and reved it fast a few times and could hear the leak. Which meant more R&R.

[SignalAutodrifter_D]

yea i drove the other to find more symptons on what is going on when i was on my way home i heard....a kinda clinking..like sound ...and then after that i could boost any more....then when i was home...i turn the car off and it made a popping noise when it shuts off......could this be from the gate...?i took things apart and check the turbo there is no leaks...and it spins pretty well wit no shaft play so i dont think i blew it yet..but iono.....

and another question ...can running rich blow your turbo...cause i been switching turbos when i had my walbro on..and may be i been running rich the whole time!???

[WILDACEX187]

i dont think ur walbro will make u run too rich. it will either be because of ur fpr or maybe u're not getting enough air to burn the fuel. i dont think richness will blow the turbo though.

[Dousan_PG]

did yu do the goddamn coilpack yet?
its so fuckng easy to do
and check the MAFS
start w/ the easy stuff.
btw, mine clicked (past tense) too.

[SignalAutodrifter_D]

ok here you go...i got everything on...and got boost but not full boost to put you back in your seat...when i drive it its fine..just that problem so i thought i was finally good and all i needed to do was take care of y it wasnt boosting all the way....

later on trying to figure out that problem im checking things...then taking it out on the street and going full throttle back and forth....

iono what it was but it caused it to hurt the turbo so all of a sudden the bov was nt goin off any more and when i heard that i new the turbo was going again..i felt full boost like 3 times.

is there sumthin that cant handle the boost so the turbo is goin out??

but thats the story and now im back to taking everything apart again....

[SignalAutodrifter_D]

ok so i took everyting back apart....and as i trace back..i dont think its any electronical or sensor errors...unless that can tell the engine when to send oil and coolant..but i dont think thats the case

well i check the lines to see if they were wet...and the coolant line from the back of the motor was pretty dry....so i was like i think i figured out the problem...but when i went back deep and check more of the lines that went back further on that ...i pulled sum stuff and cooland ran out of there freely..//
so that confused me but i was thinkin may b the coolant runs free but there is sumthin that is suppose to pressure it through that its not.>>????

next i found out that from my oil line from the block there is oil goin through casue when i dint tighten it all the way oil was shooting out but when i tightin dat shit down oil dint run out no more..but then i was like let me check the oil return like at the very bottom of the block..and that seems kinda dry....??

so from today that is all i found out...that the oil return line from the bottom block was kinda dry...dont kno 100% sure...the coolant line in the back of the motor was dry also..but when i pulled it all out coolant flew rite out????


the big question..now i kno that it is 80% my motor that is causing all this trouble....is there any way i can test or figure out to make my sure the rite amount of oil...and coolant is coming out of the motor to the turbo????
i mean the turbo is fine if it gets oil and coolant rite...so if i dont have that shit then it will blow!!

i mean it mite mite be boost spikes but dammm it cant spike that much rite....t25 can handle likke 14 psi...and i cant jump from 7 to over 14 pounds!!

so here is what i got..u giv me ur word and ur knowledge cause this fuckin block is pissin me off!!!! i will get a toyota soarer by the end of this fuckin fall if this car is not running!!!

[sr240mike]

Do you have a boost controller to raise the boost above the stock 7psi?? How do you know you have 7psi? All you said earlier was that you don't have money for a gauge. Did you ever get one?
If the turbo is spinning good by hand I doubt you have oil to the turbo problems. Im still leaning towards boost leak. How are you testing for leaks?
You have had tons of problems with blowing turbos, and im pretty sure you've had a few s15 turbos on there. Those aren't cheap enough to keep blowing. I suggest that you take it to a proper shop and let them deal with it. In the end you will most likely save money and not have any more worries.

[SignalAutodrifter_D]

well this is the last straw..i dont trust anybody working on my car but i mean if this keeps happening i have to do something different so yea i will bring it to the shop that i best think can handle this but in MN its kinda hard....

but before that im getting a oil pressure gauge...boost gauge and reset my timing so i can figure out if those are in good shape and then diagnose it from there.....so thanks for all the help and i can give you the oil..and boost info this time...

thanks everyone!!!!