Boostedtsi Posted April 28, 2010 Report Share Posted April 28, 2010 so my 88 tsi.. that i just replaced the headgasket on wont boost.. i just replaced the headgasket to ajusa and replaced the entire cylinder head assembly from hydraulic to mechanical njv head. and my car runs perfectly fine.. but when it tries to build boost it just suddenly bucks! everything is stock right now except the 14g turbo had to make everything stock for smog purposes. anyways. any idea? Link to comment Share on other sites More sharing options...
conquest707 Posted April 28, 2010 Report Share Posted April 28, 2010 massive intake leak? pvc valve problem? adjust the valve clearance right? Link to comment Share on other sites More sharing options...
Indiana Posted April 28, 2010 Report Share Posted April 28, 2010 WG actuator arm fell off or you didn't put it back on? Link to comment Share on other sites More sharing options...
psu_Crash Posted April 28, 2010 Report Share Posted April 28, 2010 Re-check all your vacuum lines. Huge IC pipe leak? Secondary injector problem? Knock Box? Ground to the intake manifold solid and clean? Link to comment Share on other sites More sharing options...
Project83 Posted April 28, 2010 Report Share Posted April 28, 2010 Plugged up catalytic converter? Link to comment Share on other sites More sharing options...
Boostedtsi Posted April 28, 2010 Author Report Share Posted April 28, 2010 the pcv valve wasnt all the way in! (fail) =(... but ill check the valve clearence.. Link to comment Share on other sites More sharing options...
Boostedtsi Posted April 28, 2010 Author Report Share Posted April 28, 2010 still not boosting..looking at my mechanical boost gauge doesnt seem like its building any pressure. i feel like im driving a 85 supra. Link to comment Share on other sites More sharing options...
conquest707 Posted April 28, 2010 Report Share Posted April 28, 2010 id also check ur cats and ic piping for leaks Link to comment Share on other sites More sharing options...
Indiana Posted April 28, 2010 Report Share Posted April 28, 2010 You set your timing? You vac. adv. hose hooked up? Did you check compression? Link to comment Share on other sites More sharing options...
Boostedtsi Posted April 29, 2010 Author Report Share Posted April 29, 2010 compressions good.. my timing is a degree over.. i didnt adj. the valve clearenve... does anyone have a procedure for mechanical lifters Link to comment Share on other sites More sharing options...
Boostedtsi Posted April 29, 2010 Author Report Share Posted April 29, 2010 cats r fine my intercoolers good... Link to comment Share on other sites More sharing options...
conquest707 Posted April 29, 2010 Report Share Posted April 29, 2010 my timing is a degree over.. should be 10deg berore TDC. so urs is 9 or 11? thats not bad i didnt adj. the valve clearenve... does anyone have a procedure for mechanical lifters it easy enough. jsut turn the motor so theres no pressure from the cam and set the screws so theres just a little friction on ur gauge (see manual for proper gap) Link to comment Share on other sites More sharing options...
Tik Posted April 30, 2010 Report Share Posted April 30, 2010 Ive had this happen and its was a coupler that wasnt tight enough on my hard pipes anyway you can go to the hardware store and buy a rubber cap that fits your turbo intake. remove your intake pipe to your turbo and cap it tight. then get youll need an air compressor and blow some air into the over the valve cover pipe to put pressure into the system and then listen for a leak. you can only do 7-10 psi befor the cap blows off the turbo so if it starts to buck after that psi id just recheck all the pipes you had off. The bucking on mine was from a sudden loss of pressure after it built up past 10psi below that it was fine once i found the leak all was well Link to comment Share on other sites More sharing options...
bmreyna Posted April 30, 2010 Report Share Posted April 30, 2010 I had this problem, I busted out the insides of both my cats,( they were not clogged ) and after this i had boost =D until my car gets hot =P Link to comment Share on other sites More sharing options...
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