Just a thought on hesitation?

[ForceFed]

Has anyone thought that the hesitation on the MSP may be caused from the car going from closed loop operation to open loop operation at 4500 RPM's?There may be a big difference in the fuel and timing map's of these 2 operations,and when it switches it may just take the computer a sec to get all the fuel and timing issues worked out ?Just a thught that crossed my mind today after doing a 500 mi. drive in my car and getting very familiar with all the little quirks of the MSP!I personally don't know if this is what it's doing but it seems to make a lot of sense figuring how our cars switch back and forth at about 4500 RPM's.(hmm)
HMMMMM?????

 

[ping]

Makes sense, but one would think they thought of that... maybe they didn't and that's the issue. Certainly fels like either a boost bleed (not-ptoperly-controlled BOV) or a timing/fuel map issue. Hope it's easy to fix, I'm trying to head up a "petition" of sorts to get Mazda's attention on this....

 

[ForceFed]

Hey Ping, I replied to your post on this issue.It would not let me vote however and i'm not sure why?

 

[ping]

I dunno - the poll should still be open (I set it to 30 days). Even with 1-2 people reporting a problem voting, we have (at last count) 47 votes WITH the concern and only ONE without. I'll check the messages as well and count 'em up but majority is "with". -LD "ping"

 

[OrangeAppeal]

Hey Ping, I replied to your post on this issue.It would not let me vote however and i'm not sure why?

Try this...go to the page....then click the refresh button in your toolbar...then try voting.

Happened to me and the above directions worked in my situation.

 

[funnylittlman]

Has anyone thought that the hesitation on the MSP may be caused from the car going from closed loop operation to open loop operation at 4500 RPM's?There may be a big difference in the fuel and timing map's of these 2 operations,and when it switches it may just take the computer a sec to get all the fuel and timing issues worked out ?Just a thught that crossed my mind today after doing a 500 mi. drive in my car and getting very familiar with all the little quirks of the MSP!I personally don't know if this is what it's doing but it seems to make a lot of sense figuring how our cars switch back and forth at about 4500 RPM's.(hmm)
HMMMMM?????

I was thinking this as well... BUT another issue that came to mind was the GT25 itself. Maybe it's really touchy to intake plumbing and the extras (BOV and Wastegates)???

 

[BremertonMSP]

Re: Re: Just a thought on hesitation?

I was thinking this as well... BUT another issue that came to mind was the GT25 itself. Maybe it's really touchy to intake plumbing and the extras (BOV and Wastegates)???

Could be, but Garrett has been making turbos for a long time, and I doubt that they would produce a turbo that is that touchy to intake plumbing. Also, this turbo is used in other applications such as Eclipse GTS.

Now, if we can get some input from guys who are using an aftermarket CAI and see if they are having a problem. My thinking is that there may be too much turbulence around the MAF sensor that is screwing up readings until the computer goes open loop.

We need to figure out when our ECU's are going open loop. I'm thinking it's a mix of TPS, RPM, and MAF inputs that determines the particular point. Just a thought.

 

[REMillers]

In addition there are Protege5s reporting this problem.....But ya so far it seems to be mostly the MPS owners.

 

[funnylittlman]

The one thing I don't like about the stock air box is that "calloway" open scoop attached to the air box. WTF is that all about? Is that suppose to rush more air in? If they were smart, they would have put the plumbing in that nice 3 in. diameter hole on the driver's side to get some real Cold air. I was thinking about just doing this for kicks and seeing what happens.

 

[BremertonMSP]

The one thing I don't like about the stock air box is that "calloway" open scoop attached to the air box. WTF is that all about? Is that suppose to rush more air in? If they were smart, they would have put the plumbing in that nice 3 in. diameter hole on the driver's side to get some real Cold air. I was thinking about just doing this for kicks and seeing what happens.

That's what my weekend project is going to be. I've already have something made up using a K&N cone filter off my Mustang and some 3" tubing. I'll post my results when I get them.