Messages

1

Engine management / Unable to rev past 3k...

« on: December 30, 2012, 03:52:03 PM »

I got mine back from the shop with no resolution and no charge. FYI, my fuel pump has been replaced and my speed sensor, CAE, has been replaced. The car was running hot, so I replaced the thermostat with a cooler one. Now it runs too cool (154 deg. F.) Could the O2 sensor cause this problem because the engine is not actually at operating temp? My reading of the literature indicates that it would simply run in open loop, but it should run.
At one point I thought I had it fixed. The literature indicates that the ABS could throw a code to the ecm if the wheels were slipping. Two of my wheel sensors were bad. Replaced them and it seemed to run fine on short trips, about six miles; just enough to get heated up to operating temp. Then, it started cutting out again at 3500 rpm. on the same six mile test run. I have checked continuity of the sensors and replaced the DME twice. Any new thoughts?

2

Engine management / 318ti (M42 motor) stalling when warm

« on: November 10, 2012, 06:29:22 PM »

There is an ISCV (idle speed) control valve with a vacuum hose running from the back of the valve cover to the air intake. It's function is to regulate idle speed according to the literature I have found. I WOULD SUSPECT THE CONTROL VALVE. I am NOT an expert.

3

Engine management / Unable to rev past 3k...

« on: October 12, 2012, 11:18:13 AM »

I have a new fuel pump; pressure & flow check per Chilton manual. Also new:
  camshaft sensor
  vacuum hoses (replaced as they were when I purchased car)
  O2 sensor
  fuel filter
  injectors
  spark plugs
  plug wires

Coils check ok and am getting spark on all four.
Exhaust has been checked for blockage.
Replaced ECM with another used one.

Nothing has helped. Still suspect hoses and need an accurate diagram for my 1991 318 I.

Hope you all don't mind my adding my problem. (first time user)

4

Engine management / Unable to rev past 3k...

« on: October 04, 2012, 03:57:48 PM »

I too hve a 1991 BMW, 318i with the same problem. It is currently at a shop specializing in european cars and they too, cannot find the problem. They suspect a missing crankcase ventilation hose. Does anyone have a vacuum hose diagram for this car? The dealer is no help, Chiltons is no help and Hanes is no help. Help!