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Z4 E85 3.0 - 2005 - will not start!

Discuss problems you have had or are having with your Z4
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colb
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Z4 E85 3.0 - 2005 - will not start!

Post by colb » Mon Aug 02, 2021 8:58 am

Did you check for spark at the plugs when you removed them now the starter is cranking?
If you have spark then fuel pump fuse will be next to check as suggested above. Code read it again to see if there is anything else showing up, thinking camshaft sensor and or crankshaft sensor gone bad.
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Z4 E85 3.0 - 2005 - will not start!

Post by knmstag » Mon Aug 02, 2021 9:46 am

Good afternoon all,
I have just replaced the crank sensor and car still refuses to start! I have checked the fuel at Schrader valve on fuel rail and there is a healthy spurt of fuel ejected when pressed wit a screwdriver,
However there is no spark or fuel at plugs.
The fuel pump can be heard to prime when ignition key is turned to first position. That’s encouraging...
To recap, starter motor was replaced with a new one and car is now cranking well, but no a splutter of combustion.
Alternator, ignition keys, EWS unit have all been checked out. There is plenty of fuel in the tank.
I’m baffled and running out of potential solutions.
Sorry to keep having to ask, but I would appreciate an further suggestions.
Regards,
Kevin
Last edited by knmstag on Thu Aug 12, 2021 3:18 pm, edited 1 time in total.

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colb
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Z4 E85 3.0 - 2005 - will not start!

Post by colb » Mon Aug 02, 2021 9:50 am

What about spark at the plugs, check if there is spark.

Relay diagram and fuse layout here may help https://fusesdiagram.com/bmw/fuse-box-d ... 5-e86.html
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Z4 E85 3.0 - 2005 - will not start!

Post by knmstag » Mon Aug 02, 2021 11:37 am

I have not checked the new spark plugs for spark. Old were were in very poor condition, as should have been replaced long ago.
Can I check for spark at plug in conventional way, by positioning electrode onto body earth point, the cranking engine, obviously with coil pack and wiring attached? - I've not worked on recessed plug types (with coil pack) before. However all plugs were dry, not wet with fuel...

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Z4 E85 3.0 - 2005 - will not start!

Post by Zulu4 » Mon Aug 02, 2021 1:25 pm

knmstag wrote: Mon Aug 02, 2021 11:37 am I have not checked the new spark plugs for spark. Old were were in very poor condition, as should have been replaced long ago.
Can I check for spark at plug in conventional way, by positioning electrode onto body earth point, the cranking engine, obviously with coil pack and wiring attached? - I've not worked on recessed plug types (with coil pack) before. However all plugs were dry, not wet with fuel...
Maybe you could use a neon in-line spark plug tester. They are very cheap and handy to have.
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Z4 E85 3.0 - 2005 - will not start!

Post by Haro » Mon Aug 02, 2021 10:45 pm

Test for fuel at the schrader valve, remove the cover over the inlet manifold and it's the valve nearest you on top of the rail. Press it with small screw driver with the engine off. You won't have a gauge so can't test it running, but if there is no fuel spray at all then that's probably your problem. To test for a spark remove coil and plug, reconnect plug in coil and get someone to turn engine over as you said, wear rubber gloves unless you want a shock, coil packs can pack a punch.

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Z4 E85 3.0 - 2005 - will not start!

Post by knmstag » Tue Aug 03, 2021 9:58 pm

I am at home in Coventry. Car is at my son’s in Burton (40 miles away) I plan to visit this weekend, and try a few further checks. The crank sensor may have been disturbed or damaged whilst removing & fitting the starter motor.
I want to also check the fuel pump relay, when I can locate it! I will also carry out a check on the fuel rail at the Schader valve, as suggested. I believe there is a fuel starvation issues, but need to discover the root cause.
Thanks for your continued support.
Kevin

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Z4 E85 3.0 - 2005 - will not start!

Post by knmstag » Thu Aug 05, 2021 1:57 pm

Ive ordered a new crank sensor, seem its worth a try. Hoe to replace it this weekend.
Does anyone know where the fuel pump relay is located on the Z4 E85?

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Z4 E85 3.0 - 2005 - will not start!

Post by BumpyZ4 » Thu Aug 05, 2021 2:05 pm

knmstag wrote: Thu Aug 05, 2021 1:57 pm Ive ordered a new crank sensor, seem its worth a try. Hoe to replace it this weekend.
Does anyone know where the fuel pump relay is located on the Z4 E85?
Main fuse panel.
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Z4 E85 3.0 - 2005 - will not start!

Post by knmstag » Thu Aug 05, 2021 2:17 pm

Thanks for prompt reply. This relay is not with fuse box behind glove box on passenger side, is it located under the dash panel?...I'm not sure of exactly where it is located in order to access it for test / replacement. - Thanks - Kevin

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Z4 E85 3.0 - 2005 - will not start!

Post by enuff_zed » Thu Aug 05, 2021 2:20 pm

knmstag wrote: Thu Aug 05, 2021 2:17 pm Thanks for prompt reply. This relay is not with fuse box behind glove box on passenger side, is it located under the dash panel?...I'm not sure of exactly where it is located in order to access it for test / replacement. - Thanks - Kevin
I seem to remember recent discussion about these relays being mounted on the front face of the fuse box under the glove box?bigwinn, was it you talking about this?
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Z4 E85 3.0 - 2005 - will not start!

Post by bigwinn » Thu Aug 05, 2021 2:24 pm

enuff_zed wrote: Thu Aug 05, 2021 2:20 pm
knmstag wrote: Thu Aug 05, 2021 2:17 pm Thanks for prompt reply. This relay is not with fuse box behind glove box on passenger side, is it located under the dash panel?...I'm not sure of exactly where it is located in order to access it for test / replacement. - Thanks - Kevin
I seem to remember recent discussion about these relays being mounted on the front face of the fuse box under the glove box?bigwinn, was it you talking about this?
Yeah I was trying to find all the fuse/relay locations

Hold fire I will find the link to the 3 key relay places- prepare to get flexibly intimate with your car!
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Z4 E85 3.0 - 2005 - will not start!

Post by bigwinn » Thu Aug 05, 2021 2:27 pm

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Z4 E85 3.0 - 2005 - will not start!

Post by bigwinn » Thu Aug 05, 2021 2:27 pm

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