Just inherited an E30 M3 from a friend. The car has been in his garage for the past 5 years. He would pull it out and start it once a twice a year. He says it wouldn't start when he pulled it out in Dec. He passed it on to me. I drained all the gas out, installed new plugs and changed the oil. I'm getting spark at the plugs , fuel at the fuel rail, fuel at the pressure regulator but no pulse at the injectors. Changed the DME relay ( the metal relay between the blue and orange on the passenger side firewall). The reference sensors measured 960 ohms ( says they should between 840-1,000 ohms). I was told to check the ground points on the frame rail and on the firewall. If the car was sitting, trying to figure out would could have failed if the car wasn't being driven. I'm gonna secure another ECU, but I'm a little skeptical because I needed to find out if something else caused the ECU to fail. Any help would be greatly appreciated. I am mechanically inclined and work on all of my cars ( 318is / 325ic/ 840ci / 540it).
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M3 won't start
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Time to troubleshoot. Sounds like you're doing fine. Also make sure the blue coolant temp sensor is within spec...500 ohms HOT upto 8000 ohms COLD. If it's higher, then the engine will flood because the DME is dumping fuel inside."I'd probably take the E30 M3 in this case just because I love that little car, and how tanky that inline 6 is." - thecj
85 323i M TECH 1 S52 - ALPINEWEISS/SCHWARZE
88 M3 - LACHSSILBER/SCHWARZE
89 M3 - ALPINEWEISS II/M TECH CLOTH-ALCANTARA
91 M TECHNIC CABRIO TURBO - MACAOBLAU/M TECH CLOTH-LEATHER
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Try a little starting fluid,if it wants to start,then troubleshoot fuel issues...could be injectors..I had to get mine cleaned.car was sitting for 7yrs,and was never started by PO.NASA
BMWCCA member
PCA member 25yrs
1991 318IS slick top
1997 M3 sedan
2001 325CI DD
“whoever turns the wheel the least, wins"
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Originally posted by e30s50dan View PostTry a little starting fluid,if it wants to start,then troubleshoot fuel issues...could be injectors..I had to get mine cleaned.car was sitting for 7yrs,and was never started by PO.
I can't wait to hear her turn over. Thanks for any help and advice.
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Originally posted by ethirtydavid View PostDefinitely pictures, what are the circumstances for your friend passing the car on to you?
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