Author Topic: Can a M42 motor come out of time? (Read 23532 times)

RED IS 91 · « **Reply #30 on:** January 17, 2009, 11:23:35 AM »

If the plugs are dry and you have fuel pressure then something is telling the injectors not to open. I doubt that all the injectors are plugged.:confused:
You don't have another ecu to try ?
How many miles on your car?
good luck

rallyegolf · « **Reply #31 on:** January 17, 2009, 11:27:27 AM »

I don't have an ecu to try, but if someone has a loner, I would appreciate it. I will check the injectors today.

rallyegolf · « **Reply #32 on:** January 17, 2009, 01:08:18 PM »

Update:
I pulled off the manifold and tested the injectors. They are dirty on the ends, but they are not getting any resistance when tested with a multimeter. Also the harness is giving 11.98 V to each injector from the harness when the key is in the on position. I will clean off the injectors and put back in the rail. Im still stumped.
How do I test the FPR? maybe that is the broken part?
If its not the FPR, then im thinking the compression in the motor is just too low to start and I need to rebuild the motor.

What do you guys think??? Im stumped. ...

B318M42W · « **Reply #33 on:** January 17, 2009, 01:52:37 PM »

i'd think that if the FPR is toast, you wouldn't get readings... spark plugs are dry and you do have voltage at the injector harness... follow the Crank sensor wire and check if it's damaged. also, make sure that the wires are well plugged into the blck box under the intake manifold. (had a similar issue and bad connection was culprit). ooh and i'm not sure about your compression #'s... the book says 156psi, but by looking around i found it was more close to 225psi???
good luck!

RED IS 91 · « **Reply #34 on:** January 17, 2009, 06:18:50 PM »

I've got a feeling that it's going to be either your crank pos. sensor or Cam pos. sensor .They are expensive though.
You still didn't say how many miles on your car?:confused:
good luck

rallyegolf · « **Reply #35 on:** January 17, 2009, 07:03:55 PM »

Quote from: RED IS 91;64885

I've got a feeling that it's going to be either your crank pos. sensor or Cam pos. sensor .They are expensive though.
You still didn't say how many miles on your car?:confused:
good luck

The resistance test was perfect on these, and the connections and wires are still good looking.

The motor has 175K on it.

KenC · « **Reply #36 on:** January 17, 2009, 09:33:58 PM »

Put a little oil in each cylinder, let it sit for 20-30 sec, then manually crank it over once. Will it start after that?

I had the same issue and my fuel pressure regulator was bad. Too much fuel = not enough compression for combustion from washdown.

rallyegolf · « **Reply #37 on:** January 18, 2009, 12:28:36 AM »

I cleaned out the injectors a little today and got rid of the heater block on the TB. I guess the only step I have left to do is replace the FPR and see if that helps. Whats the best option for a FPR that is inexpensive and a direct fit?

RED IS 91 · « **Reply #38 on:** January 18, 2009, 05:04:41 AM »

I got the following off the web...............

Bmw Fuel Pressure Regulator

Your fuel pump is kind of like one of those enormous guys at the gym: All brawn, no brain. And while your car couldn’t run without a fuel pump, it requires a BMW Fuel Pressure Regulator to take the high-pressure gasoline supplied by the fuel pump and deliver it at a steady pressure to the rest of the fuel system. Since the fuel injection components are very sensitive to pressure and volume, the BMW fuel pressure regulator ensures that the rest of the system gets its gasoline at a precise pressure; no more, no less.

Obviously, if your BMW fuel pressure regulator goes on the fritz, you pretty much get one of two conditions: Too much pressure or too little pressure. Either one can cause problems like flooding, hesitation, stalling, or a no-start condition. Fortunately, the fuel pressure regulator sits under the hood where it’s convenient to get to, and it’s fairly easy to test. Just hook up a fuel pressure gauge designed for a fuel injection system and compare the readout to what’s specified for your car. A new BMW fuel pressure regulator may be required if the reading is off.

IF you've tested your fuel pressure and it is correct then your problem may not be the regulator.
Anyway :

regulator $68
http://www.autohausaz.com/search/product.aspx?sid=txonmv45r2okc5450btd4mvc&makeid=800003@BMW&modelid=1011249@318I&year=1991&cid=22@Fuel%20%26%20Air%20System&gid=6124@Fuel%20Pressure%20Regulator

SEAL
http://www.autohausaz.com/search/product.aspx?sid=txonmv45r2okc5450btd4mvc&makeid=800003@BMW&modelid=1011249@318I&year=1991&cid=22@Fuel%20%26%20Air%20System&gid=6128@Fuel%20Pressure%20Regulator%20Seal

rallyegolf · « **Reply #39 on:** January 18, 2009, 09:00:15 AM »

Thanks for the info. I will give it a test and see what happens. I hope it is faulty so I can be done with this mess

rallyegolf · « **Reply #40 on:** January 18, 2009, 09:58:02 AM »

I didn't think about this, but with the m42 I will have to pull the fpr and hook up a fuel line to one side and a meter to the other. Correct? I'm just trying to figure this out in my head befor I get in the gurage.

RED IS 91 · « **Reply #41 on:** January 18, 2009, 12:24:56 PM »

You can do it under the back seat .Remove the bottom of the back seat ,remove the access panel ,Hook a tee into the supply line with your pressure gauge and see if you have around 42 or 43 psi .........

Do you have a Bentley repair manual ??

rallyegolf · « **Reply #42 on:** January 18, 2009, 01:13:16 PM »

Quote from: RED IS 91;64918

You can do it under the back seat .Remove the bottom of the back seat ,remove the access panel ,Hook a tee into the supply line with your pressure gauge and see if you have around 42 or 43 psi .........

Do you have a Bentley repair manual ??

FPR is good, and I even opened up the ECU/DME to se if there was anything that looked fried or corroded. It checked out. Put new plugs in and tried to fire it up. It turns over abut 5 times fast, then hesitates, then 5 times fast, then hesitates, and every now and then I get a pop and smoke come out the tail pipe. the smoke smells like burning newspaper. Kind of odd.

I think I need to do a leak down and see whats up. Maybe I have a gummed up valves or my rings are gone and there is not enough compression to fire it up.

pifane · « **Reply #43 on:** January 18, 2009, 10:32:21 PM »

Quote from: rallyegolf;64929

FPR is good, and I even opened up the ECU/DME to se if there was anything that looked fried or corroded. It checked out. Put new plugs in and tried to fire it up. It turns over abut 5 times fast, then hesitates, then 5 times fast, then hesitates, and every now and then I get a pop and smoke come out the tail pipe. the smoke smells like burning newspaper. Kind of odd.

I think I need to do a leak down and see whats up. Maybe I have a gummed up valves or my rings are gone and there is not enough compression to fire it up.

Burned newspaper? So its look like you have shit in your engine and after a moment the engine stop by itself. What you have to do when you have too much alcool in your blood? Ur drunk and you cant walk good anymore.So, you have to drink water to be clean again....

So, if everything hard and long have been done, be quick and check everything that its impossible to be. You can find somes interested things.

I got some suggestion for you,based on my experience with E30 with M42 engine, i call this the "BMW E30 PANZERTANK CHECK-UP" ::p

#1 - Check fuel and air filter . Somes peoples were saying me that my trottle position sensore were dead when it was my fuel filter had failed and the engine was eating a lot of sh*t....

#2 - Air filter.... Is clean? Remove the first part of the air intake and check in the trottle body and in airbox for water, sand or maybe paper.....or dead butterfly...why not? It's easy and quick.

#3 - WIRE! Check ALL your vacuum hose. I was unable to push the gaz to the floor completely because of a failed vacuum. Start to a good level, replace old and dirty vacuum hose, maybe some old oil is blocking.....Its happened with my car.

#4 - Profil gasket is okay? Check, check and check again. This is the first reason of problems with these car.

#5 - Gasket : No leak? Checked everywhere and no leak? If you have old and dry gasket burning in the cylinder chamber its can be bad.....

#6 - Flush the cooling system .It's cheap and it solve a lot of problems. Buy a prestone product for this. It's cheap and it will take you 1 hours. Fast and easy. Do this 2 or 3 times. Look on BMW do it yourself website for this.

#7 - What kind of oil do you use?

#8 - Do you put always the right fuel in your car?

#9 - CRANKSHAFT position sensor? If the sensor fail, you will unable to start the car. Also, if the engine have a problems this sensor, I THINK, will make you unable to start the care to prevent damage.

#10 - Water in the fuel tank can be hard to detect. Drain your fuel tank. If you have dirt or water you will see.

#11 - UNDER THE INTAKE. You see nothing. You have to dismantle everything of here and see if there's a problems.

If you CANT find the problems, keep us informed of all your habbit with your car for things we have not thinking about.

After all of this, think about 2 or 3 hours at a good bmw garage, they know all to think about bmw and its will save you a lot of times....but not money instead...loll.....

Good luck..!!!

rallyegolf · « **Reply #44 on:** January 19, 2009, 10:53:16 AM »

Quote from: pifane;64954

Burned newspaper? So its look like you have shit in your engine and after a moment the engine stop by itself. What you have to do when you have too much alcool in your blood? Ur drunk and you cant walk good anymore.So, you have to drink water to be clean again....

So, if everything hard and long have been done, be quick and check everything that its impossible to be. You can find some interested things.

I got some suggestion for you,based on my experience with E30 with M42 engine, i call this the "BMW E30 PANZERTANK CHECK-UP" ::p

#1 - Check fuel and air filter . Some peoples were saying me that my throttle position sensor were dead when it was my fuel filter had failed and the engine was eating a lot of sh*t.... I cleaned the TPS, not sure if I have bad fuel, but Chevron has yet to screw me.

#2 - Air filter.... Is clean? Remove the first part of the air intake and check in the throttle body and in air box for water, sand or maybe paper.....or dead butterfly...why not? It's easy and quick.Air filter is new and all pipes to the TB are good and clean. I even took off the Tb and cleaned it out. It was not that dirty to start with.

#3 - WIRE! Check ALL your vacuum hose. I was unable to push the gas to the floor completely because of a failed vacuum. Start to a good level, replace old and dirty vacuum hose, maybe some old oil is blocking.....Its happened with my car.I replaced all vacuum lines and removed all the rats nest of plumbing associated with the TB heater plate yesterday.

#4 - Profile gasket is okay? Check, check and check again. This is the first reason of problems with these car. Gaskets look great and like new.

#5 - Gasket : No leak? Checked everywhere and no leak? If you have old and dry gasket burning in the cylinder chamber its can be bad.....See above

#6 - Flush the cooling system .It's cheap and it solve a lot of problems. Buy a prestone product for this. It's cheap and it will take you 1 hours. Fast and easy. Do this 2 or 3 times. Look on BMW do it yourself website for this.I have not flushed the cooling yet, but I will have to once this thing cranks and can heat up.

#7 - What kind of oil do you use? 10W-30W Mobile 1

#8 - Do you put always the right fuel in your car? Chevron 87 OCT like the book says "Should be more combustible at lower temps then the 91.

#9 - CRANKSHAFT position sensor? If the sensor fail, you will unable to start the car. Also, if the engine have a problems this sensor, I THINK, will make you unable to start the care to prevent damage.sensor reads 523 ohms. Right on target!

#10 - Water in the fuel tank can be hard to detect. Drain your fuel tank. If you have dirt or water you will see.Im in So Cal, and not sure how water would get in there.

#11 - UNDER THE INTAKE. You see nothing. You have to dismantle everything of here and see if there's a problems. Just did and all the hoses are now new

If you CANT find the problems, keep us informed of all your habit with your car for things we have not thinking about.I drive it 9 miles, 5 days a week to pick up my daughter from day care. That is it. No Autocross, or driving it hard.

After all of this, think about 2 or 3 hours at a good bmw garage, they know all to think about bmw and its will save you a lot of times....but not money instead...loll..... too broke to take it to a BMW dealer. Times are tough. A year ago no problem, but now I need to handle this myself.

Thanks, I will do a leak down test tonight and see how bad it is in each cylinder. If it is way bad, then I will have to find out why and fix it myself. Thanks for the good advise you guys. I really appreciate it.