E36 Crank, Won't start. Getting spark and compression. - Bimmerfest - BMW Forums



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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 02-11-2020, 04:55 PM
Fromlogic Fromlogic is offline
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E36 Crank, Won't start. Getting spark and compression.

I recently picked up a 1992 BMW 325i Sedan Manual swapped. It cranks over but will not start. I checked for compression and the engine is getting compression. I checked for spark And it is getting spark. I then removed the line in the front of the fuel rail and cranked over and it isn't shooting fuel. So I was going to pick up a fuel pump but before I did that, I used a power probe and gave power to the fuel pump and fuel powered out of the fuel line. I then checked the connection to see if it's getting power to the fuel pump and a buddy cranked it for me and it changes from nothing to power. So I am lost on what it could be.
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  #2  
Old 02-17-2020, 02:09 AM
sundernaix sundernaix is offline
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It could be 2 things maybe something in dme is getting fried or you have a ews problem like i did and i belive you have ews which is a pain in the arse but you can get a ak90 and used ews module and gpeterson on bimmerforums made a cool ews sync software to align the ews to dme its free. Then use the ak90 to program old keys to ews thats what i did. You could be having a short in ign switch or wiring as well.

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  #3  
Old 02-17-2020, 02:10 AM
sundernaix sundernaix is offline
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Your car is not ews 2 so you could probably rule that out.

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  #4  
Old 02-17-2020, 03:56 PM
Fromlogic Fromlogic is offline
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Okay, update

It is non vanos, non-ews. It is getting fuel now and spark is still happening. I sprayed some starter fluid in the throttle body and it started for .5 seconds and died. I checked the connections to the Cam Shaft Positions sensor and it only has ground. It does not have a constant power. On the other hand, the crank shaft position sensor connection does have a power and ground and signal.

And I checked the connection to the ecu and it is not broken. And the ecu is getting voltage.

Last edited by Fromlogic; 02-17-2020 at 08:21 PM.
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  #5  
Old 02-17-2020, 09:45 PM
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hornhospital hornhospital is offline
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Getting fuel but not injecting it. Listen for the injectors clicking with a mechanic's stethoscope or a long screwdriver.
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Old 02-18-2020, 05:04 AM
M-technik-3 M-technik-3 is offline
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Have you checked the crankshaft positioner? Good Grounds? Did not see no power to Crank Shaft postioner,

Last edited by M-technik-3; 02-18-2020 at 05:11 AM.
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  #7  
Old 02-18-2020, 07:27 AM
sundernaix sundernaix is offline
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Does the fuel rail have a schrader valve? If your getting fuel to the rail i would look at injectors next if all injectors are not working move to electrical. You can take a old light bulb like a 194 peanut and put the bulb pins in the fuel injector connector have someone crank it and see if the bulb(s) light up. I belive the connector has to be plugged into the injector while doing the bulb test. Hope this helps.

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  #8  
Old 02-18-2020, 08:49 AM
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If he has spark and the fuel pump runs, the crank position sensor is okay.

The harness to an injector does not have to be connected to the injector to test it with a noid light or #194 bulb. In fact, the light won't work if it's run parallel to the injector. It's a tiny pulse anyway. Attempting to use a noid light along with the injector will reduce the pulse so that the light won't be visible.

Remember, the injectors have 12v on one leg any time the key is in the run position. The ECU pulses the injectors by GROUNDING them.
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Old 02-18-2020, 10:20 AM
sundernaix sundernaix is offline
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That makes sense now, i couldnt remember its been along time. But what this guy said should really help trying to pin point the fuel issue.

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  #10  
Old 02-19-2020, 03:02 PM
Fromlogic Fromlogic is offline
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UPDATE

Opened up the cover of the injection valves. Used a power probe to check voltage on the wires. There is two wires. I have ignition on and Both wires are receiving 12.6 volts
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  #11  
Old 02-19-2020, 03:58 PM
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Does the voltage vary on one wire when the crankshaft is spinning?
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BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #12  
Old 02-19-2020, 04:25 PM
Fromlogic Fromlogic is offline
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Yes, I checked the red and white wire while cranking and it stays 12.6 volts. On the other wire, it goes up and down.
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  #13  
Old 02-19-2020, 10:28 PM
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You said it started briefly on starter fluid. Your test of the injector wiring shows the ECU is pulsing the injectors, and we know the plugs are firing. There's only one thing left. Either there's no fuel pressure on the fuel rail or the injectors are so clogged the fuel can't get through. My guess is you have no fuel pressure, or at least not enough to get through the injectors when they fire.
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guessing gets expensive...drivinfaster
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BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #14  
Old 02-20-2020, 05:49 AM
Fromlogic Fromlogic is offline
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I am going to check the fuel pressure by putting a gauge inline with the fuel lines. What is the normal number for fuel pressure?
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  #15  
Old 02-20-2020, 04:58 PM
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42 psi or close to it.
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guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
Ken Kanne, Silverhill, AL, Bimmerfest Site Moderator
BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #16  
Old 02-29-2020, 05:25 PM
Fromlogic Fromlogic is offline
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I just checked the pressure from the filter to the fuel rail and it's showing 5-none

I then put it inline with the pump and it shows 7 then drops by itself.
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  #17  
Old 02-29-2020, 08:58 PM
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Pull the fuel pump and check the sock filter on the pump pickup. It may be something as simple as a clogged filter on the pickup.

IF the sock filter turns out to be clogged, you can clean or replace it, but consider draining the tank and having it cleaned to prevent the clogging from happening again.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
Ken Kanne, Silverhill, AL, Bimmerfest Site Moderator
BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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Old 02-29-2020, 09:26 PM
sundernaix sundernaix is offline
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Question. Is it possible for the pump to be pumping less than its suppose to. Like the actual pump is giving out but all electrical is fine?

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  #19  
Old 02-29-2020, 11:11 PM
Fromlogic Fromlogic is offline
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Could it be the fuel pump not pressuring?

Last edited by Fromlogic; 03-01-2020 at 06:07 AM.
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  #20  
Old 03-01-2020, 11:21 AM
OryHaram OryHaram is offline
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Sounds like injectors to me. I would check fuel filter and as above mentioned the sock on the fuel pump. but if they are clear i would turn to the injectors.
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  #21  
Old 03-01-2020, 01:42 PM
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hornhospital hornhospital is offline
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It's not injectors. Read what he posted. He has extremely low fuel pressure. Either the pump can't pick up fuel or the in-line filter is clogged.
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Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
Ken Kanne, Silverhill, AL, Bimmerfest Site Moderator
BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #22  
Old 03-21-2020, 01:03 PM
Fromlogic Fromlogic is offline
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update.

Took my time and replaced the fuel pump. The old fuel pump I took out didn't even have a fuel filter. Put the new fuel pump in and car took a lot of cranks but now is running but misfiring. Sometimes it will start but if you prime it good enough it will start. Atleast I got it to the start. Could the injectors be clogged? Car has been sitting for while. Or should I replace the fuel filter.
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  #23  
Old 03-21-2020, 03:23 PM
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hornhospital hornhospital is offline
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Absolutely the injectors can be clogged! You can try some Techron in the fuel, but the only real way to cure clogged injectors is to pull them out and have them professionally cleaned, or do it yourself if you have the know-how.
__________________
Quotes to live by:
guessing gets expensive...drivinfaster
nothing is more expensive than a cheap BMW...c4harpe13
buying a ratty example (of a BMW) is a parasitic relationship.(and you ain't the mosquito) 7pilot
Ken Kanne, Silverhill, AL, Bimmerfest Site Moderator
BMW-CCA #441426

1993 325is M3 clone"Ashlyn"; 1993 325is "Elvira"; 1985 635CSi "Katja"; 1984 633CSi "Sylvia"; 1987 325is "Odette";1995 318is"Bebe "; 1985 325e "Hazel Ann"

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  #24  
Old 03-22-2020, 01:26 PM
Fromlogic Fromlogic is offline
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Okay so, the car is running and I started disconnecting the plugs that goes into the coils and only cylinder 2 and cylinder 3 end up making the car turn off or drain power.
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  #25  
Old 03-22-2020, 10:56 PM
ruben7 ruben7 is offline
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Try swapping the 2 and 3 coils to cylinders 1,5,6 and see if the problem moves to those. Could be bad coils?
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