911GT2

Just like the title says, have you ever had an issue with the stock sequential system? It can be something as simple as a popped off vacuum hose to a broken solenoid. Any issue is welcome here!

bureau_c

I voted, but I'm not sure what the point is. If anyone answers no then (a) they're lying, (b) they've had their car less than six months, or (c) whatever car they're driving doesn't have sequential turbos.

jds

911GT2

For the point of this poll, see comments by Mahjik and myself in this thread https://www.rx7club.com/forum/showth...hreadid=212299

BTW, I'm glad you agree with me!

psi4psi3

not until i upgraded to BNR stage 3s

FEARED7

Hey psi.

The compressor wheels in the stage 3's are a bit different in comparison to the stockers. you will have to tinker with the setting for all the solinoids and whatnot to make it respond like it should. I have had 2 other people complain about this problem, but Dave at KD tuned it out and also Steve Kan at Gotham did a good job tuning his customers out.

Bryan
www.bnrsupercars.com

CowsniperRX7

iTrader: (3)

I had some sequential turbo issues. It turned out it was just bad turbo issues. My 2nd turbo was leaking oil into it badly.

Sinful7

I got that boost spike probelm with the sequential, and the vacumme line popped off the map sensor untill i super glued the it on

HeatTreated

seq. boost problems?
Hell yeah I have.
It got worse when I added a used Profec B. But Im cool now

Mahjik

iTrader: (1)

What 911GT2 is asking is if you have had problems with the sequential turbo control system (where going non-sequential would have fixed the problem). i.e. failed solenoid or vacuum line.

The map sensor really doesn't count as it would still be part of the non-sequential setup as well.

Not all cars are created (treated) equal.

areXseven

iTrader: (1)

My secondary T wasn't boosting above 7psi after transition. So I crossed the pre-turbo control with the wastegate electronic connections (the solenoid is in front of the UIM) and it took care of the problem. The car now has a perfect 10-8-10 pattern, although it does spike to 11psi just for an instant before stabilizing down to 10. Major difference!

Mahjik

iTrader: (1)

Thanks, however, that's not really what 911GT2 is looking for... Your problem was due to someone not installing (or reinstalling) something correctly. 911GT2 is basically looking for people who have had parts "fail".

areXseven

iTrader: (1)

Roger that. He's looking for problems related to "mechanical failure" as opposed to human error. Got it.

Mahjik

iTrader: (1)

Yep, basically he's looking for:

Your car was working/boosting fine. The next day, something is wrong and you haven't touched it. Something just failed.

That kind of a thing. Not ones like "I just did the vacuum hose job and my turbos don't work. it was fine before the hose job!".

LAracer

I voted no, although I spent alot of time troubleshooting the sequential system. Now I'm 99% sure that all my issues are altitude related.

dubulup

I bought my car knowing it had seq issues...

jdhuegel1

Nope. I drove my car as a daily driver for over a year ~10K miles with a perfect 10-8-10 boost pattern. Only problem I ever had was when I pinched the rubber o-ring on the rear of the y-pipe causing a 2 day boost leak. I think most people have trouble with these cars because they are neglected for 8 or so years by a person that bought the car to look at and then are re-bought by an enthusiast that wants to tear it up... Tear up ANY 10 year old car that has done nothing but sit and I bet you get similar results. I think more people try to attribute the hose failure to heat... I think it's age..

dubulup

O-rings fail prematurely to heat????


I'm so paranoid about heat!

911GT2

Thanks Mahjik for keeping this on topic as much as possible.

But just to clarify, for those of you too lazy to read the thread that spawned this one. Mahjik claimed that many owners have had the stock sequential system working perfectly for many years. I claimed that many have had issues with it. By issues, I mean things that broke that pertain only to the sequential control system, and were not broken by a human or replaced incorrectly. Any non user related failures.

The point of the pole is to hopefully prove that many more people have had issues with the system, than have had it work flawlessly.

Mahjik

iTrader: (1)

How about the people that own FD's and never visit this forum (because they don't have any problems)?

911GT2

Oh, I never thought about that. You think we should get the phone book...?

We've got 33,000 members, and this is not a troubleshooting only page. It is 3rd gen specific page which includes troubleshooting. I've taken a year and a half of statistics, and I can tell you that the sample population will not be skewed.

Mahjik

iTrader: (1)

And out of those 33,000 members, how many own FD's? (not many)

Actually I personally know 3 FD owners that don't come here and another one that does but rarely posts (because of all the mis-information going here).

However, you missed the point in the other thread as "mcf" pointed out. When we were saying "no problems", that doesn't mean nothing ever fails. Hell, with 10 years or so on most of these cars, it's amazing that any of the solenoids and other components still function from all the heat under the hood. When I was referring to problems, I'm talking about reoccuring problem. i.e. a solenoid fails, you replace it, a few months later it fails again, etc...

If it fails after 10 years of abuse and you replace it, that's pretty damn good considering what a majority of these cars go through. Heck, you don't get mad when your spark plugs foul?

Oh well. I hope your poll gives you what you need.

LAracer

The problem is that when something simple like a solenoid does wear out due to age/heat it can be a pain in the *** to figure out what broke. Maybe that's what 911GT2 is talking about. I didn't think he was talking only about re-occurring problems, just naturally occurring problems.

But then, maybe I'm reading it all wrong .

jdhuegel1

I dunno.. I was just talking about the vacuum lines..

jdhuegel1

Understood. I still think the problems are related to age..

Anyone know if the newer cars are having issues in Japan?

Mahjik

iTrader: (1)

You need to read the other thread. He's referring to a statement I made about people not having problems with the sequential turbo control system. He's taking my statement literally, however, there is no mechanical part here on earth that won't eventually wear out or break after XXX amount of uses. Humans just aren't that smart yet.

Simply having something fail once doesn't mean there is a problem and everyone should get rid of the stuff (that's where the poll came from).