dzraduzit

almost like the car hit fuel cut off or blow through. This started happening after a replaced my magnus manifold, so I'm assuming somthing isn't connected back right. I have the map sensor off of the manifold. I put in new plugs and it still does this. I have an AEM ems, but I was tuned right before I had issues w/ my manifold and it was running great. Any body have any idea what can be causing this? The car was idling low after I replaced the manifold so what ever is causing this probably caused the idle to drop as well (I adjusted the throttle to compensate). Car runs well except under heavy boost where the abrupt power loss happens. It feels kinda simular to blowing of your upper IC piping under heavy boost, but I have all new IC and piping and everything is together fine. HELP!

electricevo

in AEM is there boost limit tables?

dzraduzit

I'm pretty sure there are, but I was boosting 20 psi fine right after the tune, now I only can get to 13-15 psi when this happens.

ExViTermini

iTrader: (25)

post a log and that would help tremendously.

You hook the BOV back up? Do you hear any air rushing out anywhere?

dzraduzit

Bov is hooked up, no air rushing out. I have a buddy (mitsuorder) that's going to help with a datalog, he thinks it might be from changing the orientation of the map sensor, which might be throwing out of wack readings. Any other idea's/explanations of the cause would be greatly appreciated.

dzraduzit

Anybody?

KevinD

iTrader: (56)

i would imagine you no longer have the air box on, but if you do, make sure that the snorkle tabs are secure. if they are not, the snorkle collapses in on itself in boost cutting power severely.


other then that, with the AEM you have all the trouble shooting you can need at your finger tips. make absolutely sure you MAP sensor is hooked up to the manifold as close as possible to the actual plenum. also, make sure you are not T-ing off of anything for that sensor. it should have its own nipple onto the plenum (or in the case of the AEM MAP sensor, it actually threads directly into the stock manifold. with the map sensor hooked up correctly, boost leaks wont actually effect how the car runs, the leaks are before the manifold... it will just rob you of ultimate power. i would make sure the AEM is showing the load (psi) that it should see. i suspect that is where your problem is coming from.

dzraduzit

The airbox is off, and I have the map sensor connected directly to the manifold, but that's not where it was originally when I was tuned, could this be an issue?

Thanks KevinD!

ExViTermini

iTrader: (25)

do you have a laptop? Drive down the road and watch the load parameter, or just do a log of a pull. This is all pissing in the wind and playing a guessing game till you do that.

Theres a billion possibilities. Double check that the vacuum line is attatched to the FPR as well, if not the car will go dead lean and make no power, but you should be having other issues.

Just something else to guess at. But do a log and all will be revealed.

dzraduzit

Thanks.... yeah I do not have a laptop, but I have a buddy coming to help me out with that this weekend. Car is running more on the rich side, I appreciate your input.

ExViTermini

iTrader: (25)

is the boost cut setup on your aem? What are your air/fuel ratio's during the situation?

You say you replaced your manifold. What happened to the first one?

dzraduzit

Welds gave, it was a Magnus. Boost cut is setup but this is happening well below the cut off, not sure of the exact numbers but it's a little on the rich side (richer than before I changed the manifold out) but nothing extreme.

56Hotrod

iTrader: (3)

1. So you replaced your Magnus with the same manifold?
2. If you are having leaks - do a pressurized leak test.
3. Did you replace your injector grommets with the new manifold?
4. You could spray some WD-40 around flanges and see if it changes your RPM to find possible leaks too.

MRfabolous

iTrader: (17)

bump guys bringing it back from the dead i am having this problem too car is running really rich wideopen throttle 10.0 afr the car was tuned can anyone help me.