Car won't start help needed please

Well yesterday I drove my car fine to lunch and when some I go to start it and no start. The car is a 93 BMW 325is 5 speed. I check for spark which is goof. It changed both dme and fuel pump relay and still no luck. Car turns over but won't start finally I check the fuel pump and notice it doesn't have power but when hooked up directly it fires up. Can anyone please help with any suggestion. Thanks you guys dir any help.

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Crank position sensor and/or cam position sensor. The ECU won't send power to the pump if it "sees" no movement from those sensors when you're cranking.

I thought if cps was bad wouldn't it stop spark

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No I think it will still spark without CPS.

To my knowledge the cps control injector pulse n spark but would it cut power from fuel pump

Crank sensor went out on my 318. No spark, no injector pulse, no fuel pump power. Replaced sensor and all went back to working. You might as well replace both the cam and crank sensors at the same time. They aren't expensive, and they're sort of a pain to get to the connectors (under the manifold).

But I have spark I just don't have power to my fuel pump

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Ok guys update on no start issue. I bought a new battery cause old batt had a reverse polarity. Now I have power going to the fuel pump and car turns over but now It still won't crank over. But I sprayed starting fluid and car did start. Does anyone have any help please u need my car running like yesterday. Thanks for everyone advice and help you guys help rule out a rob of issues.

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Reverse polarity? You fried the ECU if you had the battery connected backwards. No wonder it won't crank.

^This.

Battery wasn't installed backwards when i took my battery to get charged at autozone they couldn't charge it because battery had a reverse polarity but it was installed properly in car. Got new battery and new fuel pump and I have power everywhere but it just won't start its turnover but wont crank. Anybody got.suggestions

God, the idiots at Autozone strike again... Your old battery did not have reverse polarity. Since the E36 was not designed to run with reverse polarity, there is no way it could have been a reverse polarity battery. The last car I worked on that had reverse polarity was a '70s MG Midget...

I repeat: the ECU is fried. Believe me. All it takes is jumping the car and accidentally connecting the jumper cables backwards to kill an ECU. Just connecting them, not even trying to start it.

The battery did NOT have reverse polarity. Autozone screwed up and tried to make you believe it was the fault of the battery. IT WASN'T. It was either connected wrong when they put it in, or if they tried to charge it in the car they had the connections backwards.

If ecu was fried car would not have spark and car would not start with a short burst of starter fluid could anyone explain how with new battery and fuel pump.and relay with a new dme relay car would.not start.

I'm done. Somebody else talk to this guy.