Messages

1

General Topics / Re: rpm limited to 2500revs

« on: December 15, 2014, 03:16:52 AM »

FIXED!!  FIXED!! FIXED!!

I'm so happy today because i replaced the cam and crank position sensors from a friends 1.6L engine that he swapped with a M42.

The cam postion sensor was easy to install... I replaced it first. But it didn't fix it.

I then replaced the crank position sensor. It wasn't easy because the 5mm bolt is positioned so inconveniently. See pic for my improv tool.
Furthermore, the cable for the smaller engine is slightly shorter and wouldn't reach the connector. I took the cable out of it's plastic cover/holder along the block and then manhandled it to reach the port. So it still didn't work. I thought it was connected  it wasn't.

Finally after connecting the crank sensor properly and trying again....I put my foot down to see the needle woosh past the dreaded 2400rpm for the first time in 10months. I can't stop smiling.... 

2

General Topics / Re: rpm limited to 2500revs

« on: November 19, 2014, 07:48:11 PM »

Had a thorough assessment with the mechanic just moments ago.

He reset the codes and then tried to find out exactly what the engine was doing.

He guessed the engine is backfiring.

When we had a look at the codes that had come up. We got "70 O2 SENSOR"

So I'll swap it out on the weekend but for now I'll try to just clean it up.

3

General Topics / Re: rpm limited to 2500revs

« on: November 09, 2014, 02:38:23 AM »

Swapped out the PCV valve. Now its confirmed that it's not the cause.

Need to get codes cleared and re-scanned.

I might have mentioned that one of the first things I did was to disconnect the exhaust pipe fron the manifold, directly under the driver's feet. There was a clear 2 inch gap while reving it to its max. If there was a broken baffle, the exhaust gasses should have exited easily.
Didn't get any better. Was pretty loud.

4

General Topics / Re: rpm limited to 2500revs

« on: November 06, 2014, 04:19:18 AM »

Just finished installing the new Knock Sensor. It didn't do anything.

The plastic around both the old ones is falling off but they must be still working.

Going to get the fault code cleared and then scanned again tomorrow.

Also got a PCV valve. Will swap it over tomorrow just to rule it out as a possible cause.

5

General Topics / Re: rpm limited to 2500revs

« on: November 05, 2014, 02:27:01 AM »

Apon evaluation of the PCV valve. I doubt its faulty. The code #68 refers to the knocksensor2 so again it's nothing to do with the PCV. I've taken the initiative to get myself a Knock/ping sensor. Part number 12141734580 which got superseded by part number 12141739368.
 Will replace it over the weekend and give an update.

6

General Topics / Re: rpm limited to 2500revs

« on: November 01, 2014, 09:02:19 AM »

Finally got mechanic to run a scan.
He wrote down code #68 and said it means the PCV Valve is faulty.

I tried the stomp test many times. Didn't work, mayby my car doesn't have that feature.  Doesn't have a check engine light either.

In theory it makes sense that the pressure in the intake increases beyond the crankcase pressure, causing air to flow the wrong way, because the PCV didn't close.

I wonder if I can just clean it up and see an immediate change. Will try 1st thing in the morning and update results.

7

General Topics / Re: rpm limited to 2500revs

« on: August 23, 2014, 10:53:30 AM »

Update. Worked on the car today....

Swapped the throttle position sensor with another one that was working fine. No change what so ever.
 
Swapped the ecu with one wat was totally fine and the same part number.  No change what so ever.

Wanted to swap the icv but that does nothing when revs are at 2500rpm anyway, surely can't make a difference.

The AMF is on the right way. I've only ever taken it out with the filter cover together.

8

General Topics / rpm limited to 2500revs

« on: August 17, 2014, 11:08:48 AM »

Hi Everyone,
My first post.

I have had a 318is Dec1994 manual Black on Black since 2008

Not a single problem since then, until I couldn't drive it for a year.

Now its been 6 months back on the road and for the last 2 months it will not accelerate more than 2500rpm.
This guy had the exact problem I have http://m.youtube.com/watch?v=mCiZsgAE4gk

When all this started, it could rev to the limiter when cold but after 3 minutes it reduced to 3250rpm.
Now it goes to 3000rpm when cold and reduces to 2400rpm later.

So far I have replaced the...
Fuel pump
Fuel filter
Spark plugs
Air Flow Meter
Coil Pack
Fuel Injectors
Air Filter
Engine oil

I have read the resistance of the
Cam position sensor: 1400 ohms
Crank position sensor: 540 ohms
I still doubt the sensors though.

I even disconnected the exhaust from the manifold incase there was a broken baffle in the catalytic converter.
It raining right now but as soon as it clears I will clean the ICV.

If anybody can direct me in the right direction, it will be greatly appreciated.

I'm from Sydney Australia 21yo totally confused.