Author Topic: Rev limiter location and repair?  (Read 2432 times)

a930rocket

  • Full Member
  • ***
  • Thank You
  • -Receive: 0
  • Posts: 102
    • View Profile
Rev limiter location and repair?
« on: January 02, 2012, 03:37:06 PM »
I took the car for a good drive yesterday (first time) and when I revved to about 4300-4500 RPM, the engine started cutting out like a rev limiter was kicking in. The engine/car runs great up until that point. With the red line at 6k +, what is going on? Where is the rev liniter and what can I do to check it?

The other thought is the tach is off and I really am hitting the rev limiter?
« Last Edit: January 03, 2012, 11:53:40 AM by a930rocket »
1991 318is

1987 911 Turbo

DesktopDave

  • Administrator
  • Hero Member
  • *****
  • Thank You
  • -Receive: 32
  • Posts: 4634
  • Lives in the 80s
    • View Profile
Rev limiter location and repair?
« Reply #1 on: January 02, 2012, 04:36:21 PM »
Rev limiter is integrated with the computer, it can only be changed with a little chip tuning.

You haven't swapped the cluster by any chance, have you?
'91 Brilliantrot 318i - COP, 4-hole injectors, 3.73LSD, NA ellipsoids, leather sport seats, ski bag, cruise control, power sunroof. Hose delete mod with red silicone!

'84 Alpinweiss 745i 5-speed driveway ornament.

carlos318is

  • Sr. Member
  • ****
  • Thank You
  • -Receive: 0
  • Posts: 320
    • View Profile
    • http://www.bimmerowner.co.uk
Rev limiter location and repair?
« Reply #2 on: January 02, 2012, 04:37:34 PM »
You will tell from the engine screaming if you hit the limit

It could be a fuel problem
[SIGPIC]www.bimmerowner.co.uk[/SIGPIC]

bmwconnect

  • Sr. Member
  • ****
  • Thank You
  • -Receive: 0
  • Posts: 332
    • View Profile
Rev limiter location and repair?
« Reply #3 on: January 02, 2012, 05:41:55 PM »
DME#175 E30 318is

4500rpm limiter is speed threshold for tacho signal fault detection.
BarrieM/// BMW Tuner - OBD1 M42,M30,M20,M50,S50 Chips & OBD2 M44,S52,M52 Flashes
EMAIL:midnight-tuning@rogers.com
http://www.facebook.com/Midnight.Tuning.Solutions
Midnight YouTube Channel

a930rocket

  • Full Member
  • ***
  • Thank You
  • -Receive: 0
  • Posts: 102
    • View Profile
Rev limiter location and repair?
« Reply #4 on: January 03, 2012, 11:51:28 AM »
I've had the car since April, but this was the first time I drove the car hard. I was in a pack of two Porsche 911 Turbos trying to keep up through the back roads. :)

Dave - The cluster has not been swapped out to my knowledge.

Carlos - It did not appear that the engine was screaming (the car is quiet as a mouse with the stock exhaust), but then I'm used to a 911 Turbo with a open exhaust and a 7500 RPM limit.

bmwconnect - What does that mean? Can you expand on it some more?

Thanks guys!

Jim
1991 318is

1987 911 Turbo

doitover

  • Full Member
  • ***
  • Thank You
  • -Receive: 2
  • Posts: 248
    • View Profile
Rev limiter location and repair?
« Reply #5 on: January 03, 2012, 12:43:25 PM »
Do you get any codes from a stomp test?

There are a lot of things that could cause this, AFM, coils, sparkplug wires, and fuel pump/filter among them.

bmwconnect

  • Sr. Member
  • ****
  • Thank You
  • -Receive: 0
  • Posts: 332
    • View Profile
Rev limiter location and repair?
« Reply #6 on: January 03, 2012, 01:44:47 PM »
Quote from: a930rocket;109343


bmwconnect - What does that mean? Can you expand on it some more?

Thanks guys!

Jim


If the car is indeed limiting at 4500 then there is indeed a signal problem at the instrument cluster. I believe that's why desktop dave asked you if you have swapped it out lately

cheers
BarrieM/// BMW Tuner - OBD1 M42,M30,M20,M50,S50 Chips & OBD2 M44,S52,M52 Flashes
EMAIL:midnight-tuning@rogers.com
http://www.facebook.com/Midnight.Tuning.Solutions
Midnight YouTube Channel

a930rocket

  • Full Member
  • ***
  • Thank You
  • -Receive: 0
  • Posts: 102
    • View Profile
Rev limiter location and repair?
« Reply #7 on: January 03, 2012, 07:19:11 PM »
The cluster may well have been swapped out over the years. What do I need to check for and what's rhe right cluster?
1991 318is

1987 911 Turbo

atdm3

  • Newbie
  • *
  • Thank You
  • -Receive: 0
  • Posts: 3
    • View Profile
Rev limiter location and repair?
« Reply #8 on: January 05, 2012, 01:21:04 PM »
You might also check your throttle cable.  It could be binding ..

a930rocket

  • Full Member
  • ***
  • Thank You
  • -Receive: 0
  • Posts: 102
    • View Profile
Rev limiter location and repair?
« Reply #9 on: January 07, 2012, 11:51:33 PM »
Cable seems good.

It's just a cut out at ~4300 RPMS.

Quote from: atdm3;109412
You might also check your throttle cable.  It could be binding ..
1991 318is

1987 911 Turbo

colin86325

  • Hero Member
  • *****
  • Thank You
  • -Receive: 9
  • Posts: 620
    • View Profile
Rev limiter location and repair?
« Reply #10 on: January 08, 2012, 09:00:53 PM »
My M3 (4-banger) had a coding plug or a cluster from a 6-cylinder installed, so I was only reading 2/3 the rpms that I should have.
I had another M3 owner drive next me at a given speed and yell his rpms out to me as I compared mine.  This is how I confirmed my suspicions.

gearheadE30

  • Hero Member
  • *****
  • Thank You
  • -Receive: 0
  • Posts: 1244
    • View Profile
Rev limiter location and repair?
« Reply #11 on: February 08, 2012, 07:26:32 PM »
Crank and cam sensors should be on the list of things to check. If either has noise issues or is at the end of its life, it won't work well at higher revs when there is more noise and the pulses are more rapid.

1991 318is Turbo
1989 Caprice Classic Wagon named Humphrey
1979 Suzuki GS750E

bmwman91

  • Administrator
  • Hero Member
  • *****
  • Thank You
  • -Receive: 11
  • Posts: 2486
    • View Profile
    • http://www.e30tuner.com/
Rev limiter location and repair?
« Reply #12 on: April 24, 2012, 02:25:24 AM »
Get a multimeter out & check the resistance between pins 1 & 2 on the cam & crank sensor plugs. Report the findings here.

If those check out, then you should check the part number on the little blue coding plug that resides in the front of the instrument cluster. To get at it, you need to remove the pedal cover & knee bolster, and then a couple of black thumbscrews up inside the dash that hold the black plastic trim piece that sits over the steering column. It is a pain to get out, and I usually end up yanking it out. The plug can then be seen in the bottom-right corner of the cluster. Report the PN stamped into it, if the cam & crank sensors check out.

06/05/2011 - 212,354 miles
Visit HERE for a plethora of 318iS stuff and some other randomness.  Would you say I have a, plethora, of pinatas?

doitover

  • Full Member
  • ***
  • Thank You
  • -Receive: 2
  • Posts: 248
    • View Profile
Rev limiter location and repair?
« Reply #13 on: April 24, 2012, 12:55:41 PM »
If the trim around the cluster is really difficult to remove,  try loosening the bolt on the driver's side that holds the dash and pushing the whole dash up. I assume they drop over time.

Quote from: bmwman91;112093
Get a multimeter out & check the resistance between pins 1 & 2 on the cam & crank sensor plugs. Report the findings here.

If those check out, then you should check the part number on the little blue coding plug that resides in the front of the instrument cluster. To get at it, you need to remove the pedal cover & knee bolster, and then a couple of black thumbscrews up inside the dash that hold the black plastic trim piece that sits over the steering column. It is a pain to get out, and I usually end up yanking it out. The plug can then be seen in the bottom-right corner of the cluster. Report the PN stamped into it, if the cam & crank sensors check out.

bmwman91

  • Administrator
  • Hero Member
  • *****
  • Thank You
  • -Receive: 11
  • Posts: 2486
    • View Profile
    • http://www.e30tuner.com/
Rev limiter location and repair?
« Reply #14 on: April 24, 2012, 01:32:14 PM »
Quote from: doitover;112102
If the trim around the cluster is really difficult to remove,  try loosening the bolt on the driver's side that holds the dash and pushing the whole dash up. I assume they drop over time.


Hmm...never thought of that! Where is it, exactly?

06/05/2011 - 212,354 miles
Visit HERE for a plethora of 318iS stuff and some other randomness.  Would you say I have a, plethora, of pinatas?