I have a 1990 BMW E30 325i. Recently I have had starting problems. It seemed to come on all at once.
The symptoms are that, after the car has sat for a while, the car turns over (battery and starter okay), but does not start. If I let it continue to turn (10 - 15 seconds), it eventually starts (but reluctantly). After it starts ... If I turn it off and retry starting immediately, it starts right away. When driving ... The engine seems to run fine (no sputtering, hesitation or lack of response). The problem is centered in that first start after sitting for a while.
I have done some reading and have tried the following ...
1) Replaced E30 Main ECU and Fuel Pump Relays
2) Installed external fuel check valve at Fuel Pump (under rear seat).
3) Replaced Distributor and Rotor
4) Inspected, cleaned and gapped spark plugs.
5) Checked and cleaned air filter
None of of these solved the problem. After I switched the relays (1. above), the problem seemed to go away, but it then returned a day or two later. I should also mention that the problem seems to be getting worse. Initially there were days when it would start right up in the morning. Now the problem seems to be there everyday and often after sitting for hours. Note that I live in a warm climate (FL), so being cold due to outside temperature is not an issue.
If someone could give me step by step troubleshooting from most likely to least likely, I would appreciate it.
Thank you in advance for your support ...
The symptoms are that, after the car has sat for a while, the car turns over (battery and starter okay), but does not start. If I let it continue to turn (10 - 15 seconds), it eventually starts (but reluctantly). After it starts ... If I turn it off and retry starting immediately, it starts right away. When driving ... The engine seems to run fine (no sputtering, hesitation or lack of response). The problem is centered in that first start after sitting for a while.
I have done some reading and have tried the following ...
1) Replaced E30 Main ECU and Fuel Pump Relays
2) Installed external fuel check valve at Fuel Pump (under rear seat).
3) Replaced Distributor and Rotor
4) Inspected, cleaned and gapped spark plugs.
5) Checked and cleaned air filter
None of of these solved the problem. After I switched the relays (1. above), the problem seemed to go away, but it then returned a day or two later. I should also mention that the problem seems to be getting worse. Initially there were days when it would start right up in the morning. Now the problem seems to be there everyday and often after sitting for hours. Note that I live in a warm climate (FL), so being cold due to outside temperature is not an issue.
If someone could give me step by step troubleshooting from most likely to least likely, I would appreciate it.
Thank you in advance for your support ...
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