I have a boost gauge, but the hesitation happened well before full boost was on.

I'm going to check the boost wires again. I used shrink wrap on the metal male/female connection. And the female metal connector slide easily into the plastic stock connector and the small white insert made a positive click when I pushed it back down.

Of the two connections:
1) Wire removed from stock connector and attached to male wire from XEDE harness
2) Female wire from XEDE harness placed into stock connector

If one was loose, which one would cause this condition? Or is there equal chance?

Could the female metal connector lose its internal tightness and not allow the male pin from the stock ECU to seat properly?

Sorry for the random questions.....just trying to logically think this through.

 

The only one that would cause that issue would be boost wire number 1.

 

I wrapped the male / female metal connectors with bare copper wire then put shrink wrap over it. I think that cured the looseness and hesitation but I'll keep an eye on that for the next few days.

During my test drive I was in 2nd gear and boost came on (still sluggish) and went to 1.6 bar then I heard a whoosh noise from under the hood and boost dropped to exactly 1 bar. The program in the XEDE has zeroed out fuel and timing.

I don't think there is a leak, but it sounds like something is opening and bleeding off the boost.

Any ideas on what to do next??

 

Went for another test drive and the abrupt hesitation is still there but no whoosh. This time it happened in 4th gear at about 1.5 bar at about 50-60mph. Sluggishness is also still there.

I'm getting frustrated now and not sure what to do except remove it all together and get my stock ECU flashed. But I want to move to V390 and not have the hassle of sending in my ECU now and when I get the V390 package. Seems like that kind of hassle is better than my current gremlin situation.

Anyway, any suggestions on what to do next?

 

Do you have the boost zero'd out too? If you do not and have timing zeroed out the ECU may be pulling timing due to knock. Another posibility is ECU is setting boost cut.

 

The biggest problem I see now is that the "problem" is changing with every time you drive the car. The Abrupt hesitation sounds like boost cut. You can check this by lowering the numbers in your boost table. If it no longer happens with lower boost, then it is boost cut. But as for the the "whooshing noise" it seems impossible to figure out. In any event, there is no possible scenario that anything electronic could cause a whooshing noise. As for the sluggishness, the car is going to be slower with no fuel or timing changes.

 

Strange how you're having such difficulty.

http://vishnutuning.com/evo_install_xede.htm
http://www.vishnutuning.com/evo_install_xede2.htm
http://www.vishnutuning.com/evo_install_xede3.htm

Are there any Xede owners in your area that would help out ?

 

The car is slower than stock, which is strange. Without the XEDE, it has great throttle response and boost. With the XEDE (zero timing and fuel) it is sluggish.

I have installed and removed the XEDE many times now and have it down to a science.

I removed the XEDE (again) for now and so far no problems. I want to make sure that the stock setup is problem free.


Is it possible there is a problem with the wiring harness?? Maybe a loose connection, broken wire, or weak solder joint?

Can boost cut occur at around 1.4 or 1.0 bar because I have had the hesitation happen at that pressure.

 

That whooshing sound does sound like boost cut, however, I know that some people here on the forums (Warrtalon) had an issue similar to that. I haven't read your list of mods -- are you running the factoring intake? If so, do you have the snorkel clipped down? I do know that Warrtalon had an issue around the top of the rev range where he heard that noise and boost was gone.

In his case, it was not boost cut. I would also double check your grounds. Make sure they are snug -- I was having a small problem with boost on my car and it turned out that the ground wire could move. Once I tightened it the boost problem was gone.

 

oh yes.. the snorkel to the intake box.. that is a major possibility. I lost my clips for that and i kept having that same issue. You need to zip tie that snorkel or buy new fastners from the factory.

 

I was also getting hesitation problems all throughout the power range. Before xede I would beat my friends SRT4 by about 2 cars from a 40punch. After xede I lost by about 8 or 9. Took it out and car went back to normal. Tried all the things you guys said, and just wouldn't work. Everytime I would run the xede I would throw the P0300 code (cylinder missfire) Shiv said it might have been a malfunction with the knock sensor. But I had that checked out and it was fine. So who knows lol.

So I know your pain

 

So did you ever get the problem resolved?
Did you put the XEDE back in your car?

 

Just get rid of that crapy XEDE.

 

I never said that it was a malfunction with the knock sensor. I recall your car having a serious transmission/clutch problem that was never solved. That will induce a PO300 code by itself in time. Sometimes adding an XEDE to such an application will make the code come on more readily. Or in some cases, less readily. The solution is to fix your transmission. Or if you want to put that off for a while, just install a C-Reader as it will surpress that particular code.

-shiv

 

Rob d-- Could you PM me your full name and address?

-shiv