motorgeek.com :: Socially inappropriate motoring information.
Search this topic:
motorgeek.com :: Board index :: 034 Motorsport :: 034 EFI
Post new topic Reply to topic  [ 56 posts ] Go to page 1, 2, 3  Next

IIc hiccup.

Author Message
 Post subject: IIc hiccup.
PostPosted: Tue Sep 25, 2007 8:06 pm 
Offline
mach 2 with my hair on fire
User avatar

Joined: Mon Jun 13, 2005 1:17 pm
Posts: 2495
Location: Farmington Hills, MI
I'm wondering if anyone else is experiencing something similar to this. I have a IIc on my 200 running V1.01.00 firmware. Once every couple days (car is daily driven) the ECU does something funny. It's like it hiccups momentarily and totally turns off the engine for what feels like one loop of control. Depending on how you are driving, you get different results. Sometimes you hardly notice. Other times if you are making 25psi of boost, it's violent. I used to chalk this up to crappy tuning on my part. However, the car is finally dialed in pretty well. It still does this. Anyone else seen this or am I special? :bashtard:

_________________
John Anderson
04 XC90
91 200 20V - not stock
01 S8 - stock
97 GMC Sonoma - 436rwhp
84 928S - 270rwhp
73 MGB


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Sep 25, 2007 8:11 pm 
Offline
mach 2 with my hair on fire
User avatar

Joined: Fri Jun 24, 2005 9:37 pm
Posts: 1328
Location: Rockland County, NY
experience the same thing, havent figured it out yet but a few people have mentioned it! Its kinda like a nasty Jult when ur on it, but if ur just cruzing sometimes u wont even feel it but u see the RPMs drop and bounce back up rite///

_________________
1990 Coupe 20vt
Power is nothing without quattro
Faster then a Speeding Ticket
-Ashesh


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Sep 25, 2007 8:49 pm 
Offline
I color outside of the lines
User avatar

Joined: Sun Nov 21, 2004 3:24 pm
Posts: 2616
Location: New Jersey
Have you logged your engine doing this yet? Based on what I'm going through I suggest you check the WDBG log for errors... anything other than 59(if that is your norm) at the time of stall/cut out.

_________________
-Phil
96 A4 Ti20
Waiting for its next HPDE
98 A4 2.8qm Avant
Undergoing overhaul


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Sep 25, 2007 8:59 pm 
Offline
mach 2 with my hair on fire
User avatar

Joined: Mon Jun 13, 2005 1:17 pm
Posts: 2495
Location: Farmington Hills, MI
Nope, I haven't got a log of it. It's never happened while I was tuning. It seems completely random. The only piece I've noticed is I don't think it's ever happened more than once in a key cycle.

_________________
John Anderson
04 XC90
91 200 20V - not stock
01 S8 - stock
97 GMC Sonoma - 436rwhp
84 928S - 270rwhp
73 MGB


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Sep 25, 2007 11:15 pm 
Offline
I sprinkle rubber on my Cherios

Joined: Mon Jun 19, 2006 11:30 am
Posts: 220
Location: Boulder, CO
same thing happened to mine...the trigger wheel sensor is loosing sync with the wheel momentarily...check the gap you have between the sensor and the trigger wheel, but it pretty much always happens regardless...just the way it is with the 60-2 trigger wheel.

_________________
95' S6 - Hoppen/MTM Stage IV


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Wed Sep 26, 2007 5:17 am 
Offline
mach 2 with my hair on fire

Joined: Tue Jul 13, 2004 8:02 pm
Posts: 1016
Location: Belleville, MI
Seems if you had a gap problem it would happen much more often. Once every couple days on a daily driven car seems like too much drive time between 'hiccup' events to be a mechanical issue.

_________________
Preston Schipper
Calibrator for hire

90tq track car on the way


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Wed Sep 26, 2007 7:29 am 
Offline
I post, therefore I am
User avatar

Joined: Thu Feb 10, 2005 8:45 am
Posts: 4676
Location: Norton Shores, Mi. My cat has human-like reflexes
my iic has it too. i think marc's does too.

_________________
7a head/milled mc2 bottom w/holset Hx35...500hp for $500?
viewtopic.php?t=6726


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Thu Sep 27, 2007 6:30 pm 
Offline
mach 2 with my hair on fire

Joined: Sun Jan 22, 2006 7:47 pm
Posts: 1019
Location: NY
So any other ideas of what the issue is here? Is this something I should watch out for with my IIc?

_________________
Dan
1986 4kq Daily/winter beater
1987 4kvr6tq Project / track car
2001.5 S4 Daily driver


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 5:55 pm 
Offline
I sprinkle rubber on my Cherios

Joined: Tue May 01, 2007 9:43 am
Posts: 209
Location: Waterloo, ON, Canada
I have the exact same problem. Car is daily driven as well and it never does it more than once every key cycle, if i'm on it its a HARD jolt, otherwise its just a tiny hicup.
The cur acctually shuts off for a split second and i can hear the relays clicking back in.

I checked everything i can't figure out why is doing it.

Car is 1.8T AWW w/ IIC


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:16 pm 
Offline
I post, therefore I am

Joined: Thu Oct 12, 2006 7:15 am
Posts: 6092
Location: Chicago
Same here, although its all fresh on my setup....but I drove 300 miles yesterday and it did it about 4-5 times each way, ~150 miles. Haven't logged it yet. It happened 2-3 times before around town. Sometimes its nothing, some time very hard.

Quote:
just the way it is with the 60-2 trigger wheel.

Brian, I don't think the setup itself is an issue because old BMW's use this. My old e30 325i had the VR sesnor on the 60-2 wheel up front but never did this.

I am also on the old firmware.

_________________
Peter
Image


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:18 pm 
Offline
mach 2 with my hair on fire
User avatar

Joined: Fri Jun 24, 2005 9:37 pm
Posts: 1328
Location: Rockland County, NY
Im dying to get to the cause of this, cuz that by far is the most embarassing thing when your car jerks...Its bad enough women think loud cars are crap :bashtard: getting jerked around driving just adds to it :frustrated:

_________________
1990 Coupe 20vt
Power is nothing without quattro
Faster then a Speeding Ticket
-Ashesh


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:23 pm 
Offline
kickin' tires'n lightin fires
User avatar

Joined: Sun Dec 03, 2006 9:26 pm
Posts: 988
Location: Gorham, ME
Hmmm...I'm watching this with great intent. It would suck to have the rallycrosser just shut itself off for a second whenever it feels like.

_________________
'89 90q Rallycross car
'86 CGT G2 Rally car
'11 Jeep Wrangler Unlimited
'00 Jeep Cherokee
'86 Honda Magna 2 wheeled kergigger

http://www.flickr.com/photos/47757586@N00/


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:25 pm 
Offline
I post, therefore I am

Joined: Thu Oct 12, 2006 7:15 am
Posts: 6092
Location: Chicago
Meh, I don't care about that....it would just suck to happen at low speeds, in traffic where it could technically completely die on you, like mid intersection or something...

_________________
Peter
Image


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:29 pm 
Offline
master of teh modz
User avatar

Joined: Wed Oct 01, 2003 7:39 am
Posts: 201871
The more logs you guys can get for us with the hiccup the better. It's cropped up from time to time on some cars, but not others. We're working on tracking it down. It's never shut a car down, especially under load, only light cruising, and around 3k rpms. I drive my coupe on a Ic daily in tons of bay area stop and go, the car has never once died, though I have had the aforementioned hiccup. So I wouldn't worry about that aspect. But yes it is something we're hunting down.

If the car is cutting out repeatedly, and/or under load definitely get some logs done, it's likely not the same hiccup as being discussed here.

_________________
Don't Panic
Image

He attacked everything in life with a mix of extraordinary genius and naive incompetence, and it was often difficult to tell which was which.
- Douglas Adams


Top
 Profile Facebook 
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:32 pm 
Offline
mach 2 with my hair on fire
User avatar

Joined: Fri Jun 24, 2005 9:37 pm
Posts: 1328
Location: Rockland County, NY
to be honest, its one of those issues that you get used too after a while.....but as long as ur not accelerating when it happens 90% of the time you wont feel it.....But i agree, i would like to know the reason too....I just upgraded to the new firmware a few months ago, and the problems still there

_________________
1990 Coupe 20vt
Power is nothing without quattro
Faster then a Speeding Ticket
-Ashesh


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:47 pm 
Offline
I post, therefore I am

Joined: Thu Oct 12, 2006 7:15 am
Posts: 6092
Location: Chicago
I'll work on it Nate. I pretty much have the laptop hardwired in the car for ow so it won't be hard to log it....and to be clear, it hasn't shut down the car on me either.

I got it once, the very 1st time actually, going about 30mph in 2nd gear, driving to an exhaust shop and it was pretty hard. All other times it was on the highway, at cruising speeds...and yeah, revs drop for a second, small backfire and you just keep going. Yesterday, at one time it was harder and Nathan said(he was driving behind me) car shot fire outta exhaust and other time a big puff of black smoke.

_________________
Peter
Image


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:52 pm 
Offline
I post, therefore I am
User avatar

Joined: Wed Oct 01, 2003 11:36 am
Posts: 6500
Location: Lee, NH
my experience is similar to Peter's. completely random as to when it happens (load/throttle position/etc) and it doesn't happen very often. When it happens under load its.. definitely noticable, but no relays cutting out or anything like that. Its pretty clear from the logs in my case that when it occurs, WDBG drops momentarily to 0.

_________________
Marc Swanson
90 CQ 4.2 V8TT
83 UrQ
95.5 //S6 Avant
93 //S4
97 F250 Diesel
Can you tell I like turbos?


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 7:53 pm 
Offline
mach 2 with my hair on fire
User avatar

Joined: Fri Jun 24, 2005 9:37 pm
Posts: 1328
Location: Rockland County, NY
def will log it for you guys when i get my car back together

_________________
1990 Coupe 20vt
Power is nothing without quattro
Faster then a Speeding Ticket
-Ashesh


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Mon Oct 15, 2007 9:06 pm 
Offline
master of teh modz
User avatar

Joined: Wed Oct 01, 2003 7:39 am
Posts: 201871
Yeah, those sound a lot more like a sync issue than a software hiccup. Everything we've seen here has never happened under load, no backfiring, no total shutdowns, just a tiny, like one revolution, dip in power.

_________________
Don't Panic
Image

He attacked everything in life with a mix of extraordinary genius and naive incompetence, and it was often difficult to tell which was which.
- Douglas Adams


Top
 Profile Facebook 
Reply with quote  
 Post subject:
PostPosted: Tue Oct 16, 2007 7:32 am 
Offline
mach 2 with my hair on fire

Joined: Tue Jul 13, 2004 8:02 pm
Posts: 1016
Location: Belleville, MI
I've felt it on an old 80tq I did with the old firmware and also felt it on multiple cars with the new firmware. Its very fast and its easy to miss. John and I were on the way to the drag strip last weekend and he said there was the hiccup and I didn't even notice as we did a light cruise on the highway. Its easier to notice with more load or at idle where the engine stumbles more noticeably. I've also noticed it only seems to happen once per key cycle.

_________________
Preston Schipper
Calibrator for hire

90tq track car on the way


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Oct 16, 2007 8:08 am 
Offline
I post, therefore I am
User avatar

Joined: Thu Feb 10, 2005 8:45 am
Posts: 4676
Location: Norton Shores, Mi. My cat has human-like reflexes
so far all i have noticed is at cruises, often when i am 2 blocks away from my house and just start my cruise, i get one hiccup. 034 display tach drops to 0 for only a fraction of a second (.5 my guess).

_________________
7a head/milled mc2 bottom w/holset Hx35...500hp for $500?
viewtopic.php?t=6726


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Oct 16, 2007 8:50 am 
Offline
Redline?
User avatar

Joined: Tue Jun 29, 2004 9:05 am
Posts: 176
Location: MSP
My car does this within the first 5mins of warm up but not every time, if at low idle (800-900) it will stall the car. I have had it logged and it will read;

59
59
59
59
59
32
59
59
59

It will only miss 1 time and then never do it again for hours of driving. I'm guessing it has something to do with metal bracket shifting during warm up in my case.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Oct 16, 2007 5:58 pm 
Offline
I sprinkle rubber on my Cherios

Joined: Tue May 01, 2007 9:43 am
Posts: 209
Location: Waterloo, ON, Canada
pkw wrote:
so far all i have noticed is at cruises, often when i am 2 blocks away from my house and just start my cruise, i get one hiccup. 034 display tach drops to 0 for only a fraction of a second (.5 my guess).


I logged my rpm on the way to work as well and same thing, split second drop of rpm to ZERO, just as i thought
I have all the sympthoms described above, light load its almost insignificant, under hard acceleration it give you a pretty good jolt.
Only does it once per keycycle, and the car can be super cold or fully warmed up.

Friday i'm going to the DYNO i hope it doesn't do it while i'm doing a pull.


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Oct 16, 2007 8:04 pm 
Offline
I boggle like it's my bidniss

Joined: Sun Nov 30, 2003 6:50 am
Posts: 8103
Location: I see the world different thanks to my steering wheel
90tq wrote:
I'm guessing it has something to do with metal bracket shifting during warm up in my case.

Cant if the 1.8T users are having the same issue.They have a 60-2 wheel on the crank so no play there.

_________________
Issam N. Abed
iABEDIndustries.com


Top
 Profile  
Reply with quote  
 Post subject:
PostPosted: Tue Oct 16, 2007 9:11 pm 
Offline
Chirping second

Joined: Tue Aug 16, 2005 11:30 am
Posts: 65
Location: MN
I'm having a similar issue on a 1.8t run by a IIc. Happens once or twice a day, usually under no or light load. I haven't had an opportunity to log it, but the tach (driven off of IIc) will drop a few hundred RPMs for a second or so.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 56 posts ] Go to page 1, 2, 3  Next
Search this topic:
motorgeek.com :: Board index :: 034 Motorsport :: 034 EFI

Jump to:  



Information

Users browsing this forum: No registered users and 1 guest



You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum
  |  It is currently Sun May 28, 2017 8:55 pm
Share |