Hey guys i am stumped and hoping one of you can help me out. I have greddy TT kit w/ built motor and was cruising around last night. I decided get on it alittle bit in 4th gear and it just didnt feel as fast as it used to. At this point i thought nothing of it, i thought maybe i was just getting used to my power.
But now i took the car out again tonight. I started at 60mph from 3rd gear, which is a great roll for our cars. I stepped on it and it felt like my car started making power and then stopped and stayed where it was. I recorded this run on my Defi gauges and this is the weird part. Im making full boost(16psi) just like i should be,fuel pressure is fine, and the car does not feel jerky or anything of the sort. It just feels like after the initial feeling of the turbos spooling up i have 300hp instead of 500 ? Any input you guys can give me would be appreciated!?
Thanks

 

check your a/f, check your plugs and gap, and check all your hose couplers... Good start anyway.

 

thnx will check all that today and hopefully figure out the problem

 

Boost leak ??

 

I was thinking boost leak too. Where are you getting your boost signal for the gauge? Is it from the outlet of the turbo or from the manifold?

 

im getting boost signal from the manifold. i will check for boost leak today hopefully ill find the problem thanks for the info guys

 

On my car, the clamp that holds the intake tube onto the output of the turbo broke on the passenger side of the engine compartment. There is very tight spacing in that area. Evidentally, when the engine shifted under torque, the clamp rubbed against a bracket in that area and, after about a 1000 miles, the clamp finally broke. I don't rembember which bracket it was, but Roger removed the bracket to provide more clearence, and secured whatever the bracket was holding in some other manner. Unfortunately, it is a pain to get into that area. Roger had to take out a number of other componets to get access down there to put a new clamp on.

 

if he's getting boost signal from the manifold, and boost hasn't changed, then I wouldn't think its a boost leak. Unless its a from the upper manifold to lower manifold, or manifold to heads.

Coolant doing anything funny? i.e. bubbling, level changing, car running hot, etc.

 

nope the coolant is fine car is not overheating at all.
very weird....
i hear a small hissing noise that sounds like its coming from underneath my APS tallboy plenum on the passenger side of car but was told this sound was normal? around the area of the injector?

 

Check the plugs too. Look for raw fuel smell or oil, or missing electrodes/ground straps

Tom

 

That is just the pcv valve. Confirm by witnessing the hissing stop when you use pliers to squeeze shut the hose going from valvecover to intake mani.

 

yes the pcv valve is hissing i clamped it down and the hissing stops could this be the problem? i tried putting better hose clamps on it and tightened it but it still hisses
im starting to think that its just my clutch on its way out. this seams to be the most sensible answer

 

Is you're AC on?

 

lol no....

 

I should have clarified that the pcv always makes that noise

 

hope u figure it out eric.......

 

when did u last clean your air filter(s)?

 

ive never cleaned the filters lol could this be the problem? ive had the ones that came with the kit since i got it installed about a year ago

 

Couldn't hurt to start there....sometimes its the simplest things

Tom

 

more money in the money pit lol. just ordered K&N filters