96' 318ti E36 M44 No Spark No Fuel

[coders]

First things first, I just want to say thanks for all the help this forum has been in the past.

I have been reading trying to figure this out but everything I have read does not have a solution posted.

About 2 weeks ago my radiator went and I replaced it, however now with the cooling system at full pressure since my last rad had a leak in the top. More problems started to appear......

1) I had to replace a head gasket...


2) Removed all old gaskets cleaned up surfaces and replaced all of the gaskets, ensured everything was put back into its correct place.

Once the car was built back up I was about to start working on refilling the radiator however I was unable to start the car, it attempts to crank but nothing...

1) The car has power all indicators are working
2) No engine codes
3) Checked plugs, no spark
4) Checked fuel pressure, none
5) Checked fuse, looked ok but replaced anyways
6) Checked relays, sound good and ring out
7) Bypassed fuel pump relay - good pressure
8) Tried cranking while pump was in bypass - nothing
9) Plugs were dry, almost like the injectors were not firing either

A couple of notes on the car, there is an aftermarket radio, so I cannot enter the code if there is one.. I would have to find out what I did with the radio. Replaced the Rad and Camshaft Sensor 2 Weeks ago. It was running but hard to start and very rough idle as of last Friday hence the above photo.

I even tore back down to lower intake to check sensor cables and everything is in check...

I hope the information provided is enough. Oh the battery is brand new this year, I picked it up about 4 months ago.

Please Help.

[thebmwnut]

Crankshaft Position Sensor is what i would check

[xxxJohnBoyxxx]

Yes CPS sensor not plugged in tightly or plugged in wrong pigtail

[alika808]

I read thread about the ohms reading of the CPS, according to the Bentley Manual, pin 1 & 2 should be 1200 ohms, +/- 10%, meter leads (red or black) should either pin 1 or 2. Also, pin 1 & 3 should be open, likewise pin 2 & 3 is open also. Anyway, I bought a brand new and it reads only 560 ohms and I know it works with my car. By the way, did you check the Unloader Relay (K6326), located at the DME/ECU compartment. I attached here the excerpt diagram for 1997 and I hope it's the same as your 1996. Also, check the Cam Position Sensor located behind the radiator, in front of the engine.

[alika808]

Here the diagram.....

[alika808]

Here's the ohms check I took from a brand new Cam Position Sensor. For testing purposes, there are three pins but there are no number designations. So, let's give each one, looking at the connector and the wire be at the left hand side (extended) of the connector, lets assume the first pin from the left is pin #1, the middle is pin #2 and the last pin to the right is pin #3. Note: Meter lead red will be + (plus) and the black is - (negative). This CPS works in my car.

Meter lead as follows:
Pin #1 -
Pin #2 +

Pin #1 -
Pin #3 +

The above reads open

Pin #2 -
Pin #3 +

The above reads 443.0 k ohms

Pin #1 +
Pin #2 -

The above reads 1.279 M ohms

Pin #1 +
Pin #3 -

The above reads 0.746 M ohms

Pin #2 +
Pin #3 -

The above reads open

[xxxJohnBoyxxx]

Ok sorry you are still having issues. The Crank sensor is a Reluctor not a hall sensor. Reluctors read the up/down stroke of the tooth passing the sensor. You should have a 60/2 crank wheel so every 15 teeth is a 1/4 turn of the crank and the 2 teeth missing is reset to start the crank position reading. Hall sensor is used on the camshaft sensor. I fairly sure of this since I have installed standalone systems on the M44 and it would only read the Crank sensor in reluctor more. To test a reluctor you need a scope.

Ok double check all fuses there is a 7.5 amp that will cause this issue. Also the unloader relay needs to be checked. The unloader supplies power to only items needed during the start process. As soon as the car starts the unloader goes off and central relay takes over.

Hope this helps...

[gfab093]

does anyone know if the 95 ti's with the m44 had an unloader relay

[alika808]

I don't think so. Download here the wire diagram for 1995 and I didn't see a relay. It should be a relay between the ignition key to the coil pack/spark plugs. Unless I just missed it.

http://wedophones.com/BMWManualsLead.htm

[alika808]

The wire diagram here is only for M42 engine.

[xxxJohnBoyxxx]

The unloader is usually located in the DME compartment. Also did you double check all fuses? All fuses should be checked with a OHM meter. There is a 7.5 amp fuse on my car that when removed or blown causes a no fuel or spark issue

[gfab093]

Ill have to take another look especially because all those OE fuse are hard to read when they get that small.

[alika808]

FYI: I have same symptoms with my 1998 318ti and I replaced the CPS. Also, ohms check the Cam Position Sensor. It's running now. Make sure you have a good fuel pump. I changed mine because the car have been not running for almost 2 years and I found out that the floating arm have been corroded due to moisture inside the tank.

[pdxmotorhead]

Originally Posted by gfab093

does anyone know if the 95 ti's with the m44 had an unloader relay

95 with a M44 ?? didn't know they did that...

My 95 has a M42.. But a lot of the engine externals are the M44 style. Very very late production.

[alika808]

1996- 1999. Reference see below.

http://en.wikipedia.org/wiki/BMW_3_Series_(E36)