just not the same

[bigdukk2]

so my fellow dsmers.... i've owned dsms for about five years... and my current one.. a 99 gsx for the last two almost... let me start from the beginning... its very weird...

so im drivin home from Iowa... and its runnin ####in great... i mean just retarded mean.. rips all four loose from a dead stop... and i make it about 400 miles.. almost back to the upper penninsula of michigan... and i'm at WOT at about 60 mph... full boost... and a loud POW sound goes off... the car dies... car won't start up.. its throwing a cell code.. (it was the cam sensor) it cools off starts up... runs for about an hour... and just dies... every time it cools it runs.. so i change the cam sensor... and its back up... runs great... runs fine.. no ticks... no knocks.. no nothin.. no cel codes.. boosts great.. but it just doesn't have the umph it had... and i'm just wonderin what i could do to start tryin to get it back.. i mean this engin is reliable.... i'd drive it to the end of the earth and back.. i've put 50,000 on it since this incident.. it runs great.. but i'm gettin to the point i wanna know why it doesn't just rip like it did... so heres what its got... and i appreciate any help... i'm extremely knowledgeable in engines ... and i rebuild alot... my tranny is at jackstransmissions for an evo gear cluster... so i got a 16g, an evo O2 housing... 2.5" turbo back, hardpipe IC piping.. a 1G BOV(i recirculate) and a manual boost controller, its set at about 13.. but when i try to change my controller to higher.. it kinda stays right around 13... turbo runs gread, changed it once... no difference, changed back ... and i wanna find out why its runnin like this... again.. no codes... no problems at all....

you think a boost leak would cause this kind of problem?... or a valve sping gone... or a sensor im not thinkin of... i'm really at a loss this time around... pls guys and gals... any ideas i'm willin to try before my tranny gets back to try to get some more power outta it... i haven't changed anything on it since then... same exact setup as when i bought it... so whatta ya think... thanks in advance

pls wise men... help me

 

[ptownracer]

Well im not a wiseman sounds to me like your car is most likely modded fairly if its breaking all 4s that easily id think your cam angle sensor isnt dialed in correctly depending on your valve train setup they may have had the timing advanced or retarded a few degrees which would cut back on that kick in the pants u no longer feel... good luck bro



p_townracer

 

[killer_eclipse]

i agree check the timming and if i were you id just yank the valve cover and do a quik check to make sure everything looks in order ive had a rocker arm majicly jump off befor so you never know

 

[paultheninja]

Do a boost leak test, and check your timing.

 

[red1993gsallmt]

how long ago did it feel like it had more power, was it in the winter. Smaller turbos (16g,18g) pull alot harder in cold weather compard to hot muggy summer weather. Also sounds like a boost leak

 

[bigdukk2]

i'ts been on jack stands for the last 6 to 8 months awaitin a jacks transmission with evo gears.. , so i haven't had the chance yet... but i finally got it in.. and now we"re cookin with bottled gas...(its runnin) but not right.. i think i need a new MAF.. ??/ but thanks guys.. i'll do a boost leak.. sounds about right for whats goin on..

 

[mrTalonAWD95]

i agree with the winter thing. its like a 5-10hp increase on a stockish car. as well as cold ground not giving proper traction.

you should check your timing and boost leaks. also seafoam your engine just because it helps.

 

[juvi1624]

Wait, you say it's been 50000 miles since you thought it had more power? It could be that you have the timing misadjusted, but have you kept up with maintenances? Have you done a compression check? This engine is obviously getting up there in miles, it may just be falling off.

Or it could just be that you are used to it now so it doesn't feel as fast to you, which is very common. I remeber the first car I modded I though was sooo fast, but looking back on it, it only dyno'd 205/225 and my car that I have now has nearly 400 and I don't think its that fast. It also sounds like your MBC isn't working if you can't turn up the boost. I'd get some injectors, something to tune with, and crank the boost up to about 20, and you should be pretty satisfied that it has some power back. But make sure everything is in working order first, obviously.

 

[bpestilence]

You said you were in full boost, heard a pow! And the hasn't been the same since. You also saw you can't get more than 13 psi on a 16g.
Sounds to me like you popped a coupler. Not a complete seperation or it wouldn't run right, but a tear that opens up in boost. Do a boost leak test to 30 psi and see what happens.
The loss of power you are experiencing might just be less boost. Just as an estimate, it takes about 18-20 psi before you are making enough torque to break loose an AWD car on oem tires.

 

[bigdukk2]

so i BLT.. and turns out the TB shaft seals were shot.. the isc o-ring was non existane.. had like half of it missing... and the TPS had oil residu coming out when i took it off to change it over.. so i just bored out the manifold.. and freshened up the 1gT TB and threw er on... its nice now... and i had two blown couplers... it was my DD so i never had the chance or the time to get down and dirty with it.. so now i finally had time... i got it runnin right.. i had a wax pad... (the little round ones) stuffed in my 16g to keep it from gettin dirty.. and just forgot to take it out.. so now she runs like a beast again... i got two oil catch cans... relocated my battery to the trunk.. and also my PCV valve was SHOT... it wouldn't seal whatsoever.. so got a new one in there now.. and she runs about a million times better.. my shaft seals in my TB are still leakin.. but very slightly... so is that really THAT bad?... and can i fix that myself?... just wonderin about that... i also have an OBX fuel rail that i'm preppin up... i bored it out and made it more open than a stock one.. and opened up the injector spots too... thanks guys....

 

[bigdukk2]

so...... i consider my self a total FUDGING retard.... as i stated before... my car used to be my DD, so i never really kept up on the HIGH OUTPUT maintenance.. just the normal... so i never checked my plugs... it had platinums... so i changed to some normal bpr7es,....and talk about a raped ape..... raped ape with a dildo in its butt... now my brand new clutch slips ... its back... and its not black... its green.... and i like it... i like it alot.. the old plugs looked like this and got some more questions now

like i have a auto value clutch .. and pressure plate... can i use my act 2600 Pressure plate on my auto value disk??? or whats the deal? and i put it on just before the 8 month stint on bricks... and was rusty as hell i'm sure of it... can i get away with just sprayin it off with some brake clean and havin someone pump the clutch???

NEVER EVER EVER USE PLATINUM PLUGS PEOPLE.... 2 YRS of BS and it was the fact that previous owner used 15 dollar plugs instead of 4 dollar plugs..
it will run great... idle great.. but rob power and create detonation... so pulling timing .. therefore GUTLESS....