need some help: problem after changing t-belt and 1g tb

[mirkoelek]

I cant figure out why my car is stuttering when im trying to raise my RPM's. its backfiring a lot too. Sometimes, it let me to raise RPMs up to 5k with a lot of noise....before this start to happen Ive swaped 1g tb, rebuild my trany, changed my t-belt, removed balancer shafts, replaced all pullies...I have dsmlink and cant figure out the problem.. Any suggestions would be wellcome..
thanks

 

[Spidey]

Are you absolutely sure your timing is set properly? Have you done a boost leak test? Just some things to consider. You may also want to get on the DSMlink board and post some logs.

 

[90 TSI FWD]

thats how my brother's 1g acted.. and then we found out it was the throttle body.

 

[mirkoelek]

thats how my brother's 1g acted.. and then we found out it was the throttle body.

what could be wrong with tb, i'm 90% sure there is no boost leak.
im not sure for timing belt marks they were little off on camshafts, the middle marks were about 3/8" below the line that side marks make, but this way i had it before and it worked( maybe because i have webcams or something )

 

[Turbocharged]

what could be wrong with tb, i'm 90% sure there is no boost leak.

Yesterday you said you had a boost leak...
http://www.dsmtuners.com/forums/showthread.php?t=222288

im not sure for timing belt marks they were little off on camshafts, the middle marks were about 3/8" below the line that side marks make, but this way i had it before and it worked( maybe because i have webcams or something )

So your cam gears do not line up? That has nothing to do with cams.

 

[mirkoelek]

Yesterday you said you had a boost leak...
http://www.dsmtuners.com/forums/showthread.php?t=222288



So your cam gears do not line up? That has nothing to do with cams.

yep , but i fixed that problem with the vacuum leak ... and i have the same stutter problem again..
i couldnt lineup my camgear marks, i tried evrything...

 

[Turbocharged]

yep , but i fixed that problem... and i have the same thing again..
i couldnt lineup my camgear marks, i tried evrything, but honestlly i dont think that could be the problem

Is this a serious statement... good luck figuring out the problem

 

[mirkoelek]

Is this a serious statement... good luck figuring out the problem

i'm sorry, having hard time explaining the problem

 

[Turbocharged]

Set your valve timing up correctly and let us know if that changes anything. Its crucial to do this.

 

[mirkoelek]

Set your valve timing up correctly and let us know if that changes anything. Its crucial to do this.

i dont know how. i thaught it will be simple. i would lined them up without t-belt and then after i put t-belt marks move. I even counted number of steps on the t-belt to match the pic that i made before i removed t-belt... still offset

 

[alexg1323]

your problem is described perfectly. you put your timing belt on wrong, you really shouldnt have even wasted your time putting the cover and friends back on if you didnt have it properly timed in the first place. it baffles me how you know your cam gears are 3/8" off and think its not the problem. So really what if your question if you answered it yourself. Anyone on here will agree thats more then minor you have to do the timing belt IN TIME. Your gonna need to get someone with t belt experience or just more patience and learn the art of aligning the cam gears

 

[larsrya8]

http://www.vfaq.com/mods/timingbelt-2G.html

 

[kanderson111]

i dont know how. i thaught it will be simple. i would lined them up without t-belt and then after i put t-belt marks move. I even counted number of steps on the t-belt to match the pic that i made before i removed t-belt... still offset

The exhaust cam is going to spring counterclockwise when released. You must hold it with a wrench, then slide the belt on, then you can release it. After this you must look and make sure it is right. You also need to manually turn the crankshaft all the way around a few times after you get the belt on just to make sure everything is still correct. All of this is explained in the repair manuals. I would get one, read it carefully, and follow each step as it explains in the manual.

 

[mirkoelek]

it seems to me that nobody understand what is the problem with putting the t-belt on the camgears. OK let me explain what i did... first thing i put both camgears with hole right above the camgear bolt to look up... then i tryed 1000 different positions and i couldnt make a straight line.... then i counted number of steps from top of the one gear to top of the another... there is no way i could miss this way (15 step) if i go 16 or 14 it would be way off.... i counted steps from the picture that i made before i took my t-belt off...couldnt miss this way.. im not a complete idiot.... i wish there would be reasonable explanation for it but i couldnt see it..... and i did follow instructions from the vfaq which is very simplyfied

 

[mirkoelek]

thats how my brother's 1g acted.. and then we found out it was the throttle body.

what was wrong with the tb

 

[Turbocharged]

im not a complete idiot....

Nobody is calling you an idiot but your timing IS off. You need to have your valve timing correct or your car is not going to run well. My suggestion is to take it to a shop if you are not able to do it yourself.

Timing is especially hard to setup in a car with aggressive cams because the cams dont have the nice slope that the stock cams have. This means that you have to hold the cams in postion with extra force when setting up the timing. I found that it is easiest with two people; one person aligns the cams and the other zip ties them together. Once thats done, its as easy as putting the crankshaft at TDC, putting the belt on and adjusting the elliptical tensioner until you can remove/insert the hydraulic tensioner pin.

When the crankshaft is at TDC, EXACTLY what is the position of each cam? How many teeth advanced/retarded?

 

[mirkoelek]

Nobody is calling you an idiot but your timing IS off. You need to have your valve timing correct or your car is not going to run well. My suggestion is to take it to a shop if you are not able to do it yourself.

Timing is especially hard to setup in a car with aggressive cams because the cams dont have the nice slope that the stock cams have. This means that you have to hold the cams in postion with extra force when setting up the timing. I found that it is easiest with two people; one person aligns the cams and the other zip ties them together. Once thats done, its as easy as putting the crankshaft at TDC, putting the belt on and adjusting the elliptical tensioner until you can remove/insert the hydraulic tensioner pin.

When the crankshaft is at TDC, EXACTLY what is the position of each cam? How many teeth advanced/retarded?

My cams are not off for a teeth or two, they are off for about 2-3mm. Before i said 3/8" , that was wrong, . So, middle marks are 2-3mm below the line of the side marks... if i add or take one teeth between cams from this possition than it would be way off. Put it this way, i can align cams without t-belt , but when i try to put t-belt im off for about 1/2 teeth...My friend was with me who did this 100 times, and he couldnt figure it out neither...

 

[mirkoelek]

I removed whole EGR system too, maybe that would have something to do with the stuttering...or maybe not

 

[mirkoelek]

after raising my airflow sliders on the dsmlink ive got a lot better, RPm's would go up now but still feels very noisy and shows lean on my wideband lets say after 3-4k its shows 13.5-14.5 a/f ratio...I'm getting kinda confused now, tryed a lot of stuff, maybe im just missing something little. Any help would be welcome now....

 

[CanadianTSi]

Could you get a picture of how far off your timing marks are?

 

[mirkoelek]

Could you get a picture of how far off your timing marks are?

will do, thanks..

 

[90 TSI FWD]

what was wrong with the tb

we first redid the timing belt like 2 times and it still wasnt solved.. we kind of accidentally solved the studdering problem in the upper RPMs because the isc motor messed up and idled the car at 3000 RPM, we just changed the entire throttle body since we had an extra one. then all of a sudden, it stopped studdering, so uhhm, i dont know what was wrong with it, but after changing it and removing the vacuum lines and emissions, it stopped.

 

[mirkoelek]

we first redid the timing belt like 2 times and it still wasnt solved.. we kind of accidentally solved the studdering problem in the upper RPMs because the isc motor messed up and idled the car at 3000 RPM, we just changed the entire throttle body since we had an extra one. then all of a sudden, it stopped studdering, so uhhm, i dont know what was wrong with it, but after changing it and removing the vacuum lines and emissions, it stopped.

isc and tps i swaped from my 2g tb, I'll try to put my old tb back and see how is gonna work , thanks

 

[mirkoelek]

here are some pics, let me know what you think..

 

[CanadianTSi]

Those marks are pretty much dead on...are the other marks lined up?