no power

[gteatr6]

Was tuning again today and when in drive about 30 mph and punched it, the car hit about 10lbs of boost, seemed to not go anywhere and hit 33 degrees knock. Any ideas? When in drive and above 30 mph and ease into it, no knock at all and pulls good. Running cam2.

 

[ES1]

Do you have any other numbers?
o2s
MAF#'s
Is fuel pressure increasing with boost?
Have you done the spring cleaning?

 

[gteatr6]

maf 255, I was watching knock. New motor, has 20 mi on her now. Fuel is at 41 lbs hose off at idle. What should my numbers be and what should I monitor when I test this again tommorro?

 

[gteatr6]

just checked coil pack at it was 13.8,12.6, 12.8. I believe this should be fine. What should the wires ohm at?

 

[ES1]

O2's around the high 700 low 800 area @ WOT
blms close to 128
fuel pressure going up 1# for each pound of boost
Make sure all hoses are tight and all vacuum lines are zip tied
Make sure torque sensor is torqued correct
The only time make car showed high knock numbers was when I blew off a hose. I can't remember which one it was.

 

[gteatr6]

checked coil pack when hot, and one coil checked at 14.5 and the others were mid 13. I just tried another one and so far no problems. She finally broke the tires loose in 2nd. I am going to put some miles on her today and see what happens.

 

[gteatr6]

still does it. help!

 

[gteatr6]

all numbers are good. it only does this when you punch it at around 30 mph. It feels like it wants to back fire. In other words when you hit passing gear (2nd) it loads up. Drive and over drive are perfect, no knock at all. The car really does sh*t in the low end, maybe 10lbs of boost.

 

[denn454]

are you hearing any pinging? if your really getting 30 some deg. of kr then you'll probably have holes through the pistons or no head gaskets left.

I would guess you have something loose that is ratterling the knock sensor and making it THINK its getting knock and retarding timming, thus making the car slow.

I would bet there is something vibrating with the frequency on the engine when you punch it. easing into it lets the frequencys cancel eachother out. make sure there isn't anything loose.

 

[turboclam]

Same problem with no power!

Car just started doing this. Even if I ease into throttle at a 5 mph role the car will start to register boost but won't pull. Seems like the timing is being taken out. Shows 800 02s and 25kr. Anything particular to look for. Thanks

 

[gteatr6]

car runs good, no pinging. Just when you nail her at 30 or so mph, which makes it downshift, is when it feels like it wants to backfire and gets 33 for knock. It did this ounce and awhile before the rebuild. I have tried a stock computer and stock chip also. It acts like it is loading up, but if i ease into it, she runs great. I put over 100 mi on it today. It feels like there is not much power in first and second, but she screams in drive. 10lbs in 1 and 2 and 17 in 3 Help!!!!!!!!!!!!!

 

[trbojo]

what all did you replace on the rebuild? kinda sounds like my problem before replacing the valve springs.

 

[turboclam]

Triple check your vacuum block for leaks

check for leaks at the vacuum block and fuel pressure regulator. I had similar problems and found a leak that affected the regulator.,Is your tranny in good shape?

 

[gteatr6]

could the cam sensor be not adjusted correctly. I have noticed crappy gas mileage so far.