bad cps cause no 'key on' fuel pump priming?

[superboosted]

No right? It cuts spark and injector pulse correct? But I should have rail pressure even with a bad crank sensor am I correct?

How about park safety switch? It is an auto-will this cut everything?

[FLG]

Dme will only prime fuel when it sees timing data. Bad cps can cause a no fuel/no spark condition. But you need to crank to check for fuel pressure not just cycle the key.

On an auto bad nss will cause a no crank condition, but not a no start.



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[superboosted]

oh ok,ill get another cps today. Anything else cause a condition like this?

[FLG]

You should further investigate before buying a cps. Also if you do, don't get an aftermarket one. Dealer only.

Have you checked to ensure spark? Fuel pressure?

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[superboosted]

oh yeah.

-no fuel
-no spark
-will just crank

And,I have another,running 325. So i can just swap that sensor on.

[FLG]

Might also want to check the dme relay on the driver side inner fender

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[superboosted]

^ swapped it out first day...Wish it was still warm,im just working outside is the problem. Damn cold

[superboosted]

Well I have no power at the coil at all. That isn't cps related. :(

[603Racing]

What year/version e30?

Could be the security "feature" of the OBC relay box. If it fails it will cut fuel and spark. You can jumper the two green wires together where they go into the box to bypass it.

There aren't very many failure points that will cut both fuel and spark. You checked the fuel pressure or volume and you have none?

[superboosted]

Well I have power at the coil with Key on. I also replaced the CPS with a know good one. Just cranks. Ecu was swapped. 1988 with 6button obc.

-No spark
-No fuel

[FLG]

Check for power at the dme. I don't know the pin out but there's switched power and battery power. Could be blown fuse on the power coming from the battery, there's an inline fuse to the dme few inches from. The battery on the smaller cable

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[superboosted]

I will check. But I know that fuse is good. Checked that yesterday.

[superboosted]

Thanks for all the help... Bad fuseable link in the trunk!

[FLG]

Thanks for all the help... Bad fuseable link in the trunk!

Anytime bud!

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