mbarnes Posted March 15, 2011 Report Share Posted March 15, 2011 i finally got around to putting my tbss intake on. got everything buttoned up and let it idle for about 5 min. then took it out for a test drive. first couple mins of driving all is well truck seems to going through the rpms faster, i might even have cracked a smile. then i come up on a red light and let off the gas as the rpms got down to about 2000 i hear this high piched squeeling that goes away at 1000rpms. the truck now consistantly does this same thing but only after its warmed up. so today i pulled the intake and cheked to make sure all injectors had o-rings, the fuel rails had all their proper o-rings, and the intake gaskets looked better than the ones on my factory intake. also i made sure the knock sensor wires werent pinched between the intake and head. Does anyone have any suggestions or experience w/ this? a bit of info: i used a dr. x harness for the tb which idid a mild porting to, i used a tee on the port on top to run lines to the pcv and pass. valve cover, i broke off the nipple on the pass. side to run a line to the fuel press reg,, as for the fuel rails i used my stockers and did a little bend to the stock crossover to clear the new intake. If i cant get this fixxed i guess i buy another fuel rail crossover and put my old intake and tb on. thanks, Mark Quote Link to comment Share on other sites More sharing options...
Krambo Posted March 16, 2011 Report Share Posted March 16, 2011 Can you detail how you ran the PC"V" lines a bit more? From the sounds of it, you are pulling a constant heavy vacuum on the crankcase which may explain the high pitched squeeling sound. Quote Link to comment Share on other sites More sharing options...
mbarnes Posted March 16, 2011 Author Report Share Posted March 16, 2011 on my stock intake there was one port just to the side of the tb that ran to the pass valve cover and one on the top that ran to the pcv. on the new intake there was only one port so i just bought a tee and ran both lines to the top port. Quote Link to comment Share on other sites More sharing options...
misterp Posted March 16, 2011 Report Share Posted March 16, 2011 on my stock intake there was one port just to the side of the tb that ran to the pass valve cover and one on the top that ran to the pcv. on the new intake there was only one port so i just bought a tee and ran both lines to the top port. That's your problem - I would bet you are 'sucking' all the air out of the crankcase, but there is no way for outside fresh air to get into the motor!!! You are trying to suck the valve cover gaskets into the engine on decelleration!! I have a TBSS intake in the garage, I will look at it tonight to come up with an idea on what to do; I would run the PCV line to the intake, install a vented oil filler cap, and cap the 3/8" nipple in the passenger's valve cover. You can verify the issue by temporarily running a single hose from your PCV valve to the nipple on the intake manifold, and then leaving the nipple on the passenger valve cover open to the atmosphere to allow in-rush of air, so the PCV system can draw the necessary 'draft' through the crankcase of the motor. Mr. P. Quote Link to comment Share on other sites More sharing options...
mbarnes Posted March 17, 2011 Author Report Share Posted March 17, 2011 after reading krambos post last night i realized what was going on. this morning before work i did just as mr. p said and just unhooked the "tee" on top of the intake and just ran the pcv there and left the pass valve cover vent open. and .......no more F'n sqweeling. thanks alot guys for the responses. now just to get the damn thing tuned again. Quote Link to comment Share on other sites More sharing options...
Krambo Posted March 17, 2011 Report Share Posted March 17, 2011 after reading krambos post last night i realized what was going on. this morning before work i did just as mr. p said and just unhooked the "tee" on top of the intake and just ran the pcv there and left the pass valve cover vent open. and .......no more F'n sqweeling. thanks alot guys for the responses. now just to get the damn thing tuned again. Keep in mind that the PC system in the configuration you just stated is still not quite correct. Because you now have unmetered air getting into the engine, your fueling will be off (fuel trims will correct for it but still should be fixed). Instead of leaving the passenger valve cover port "open", plum that to your intake tube at a location AFTER the MAF sensor and BEFORE the Throttle Body. The vacuum in the intake tube is far less than in your intake manifold and therefore you will get the sweep of air needed to correctly flush the crankcase AND your PCM can properly control the fueling of the engine. Quote Link to comment Share on other sites More sharing options...
mbarnes Posted March 17, 2011 Author Report Share Posted March 17, 2011 ok thanks krambo. i was going to just get a oil cap w/ filter but i guess ill just put a fitting in the intake tube. thanks again Quote Link to comment Share on other sites More sharing options...
Krambo Posted March 18, 2011 Report Share Posted March 18, 2011 ok thanks krambo. i was going to just get a oil cap w/ filter but i guess ill just put a fitting in the intake tube. thanks again Sure, you can do that however in my opinion, the way I outlined WITH a catch can is the best option. Quote Link to comment Share on other sites More sharing options...
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