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Author Topic: C30XEI/C30SE wont start  (Read 5909 times)

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Anvarv

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C30XEI/C30SE wont start
« on: 06 March 2023, 12:40:07 »
Hello guys,

Looking for some help to start C30XEI (same as C30SE) again.

Changed spark plugs and valve seal. (Firing order is not changed 153624) 

After that car wont start anymore.

* Fuel pressure is 2.5-3bar and its okay
* Spark is good
* Mass cables correct, cleaned and good
* 98octane fresh fuel
* Fuel filter new


Any ideas? cuz i dont have anymore
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Doctor Gollum

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Re: C30XEI/C30SE wont start
« Reply #1 on: 06 March 2023, 13:01:33 »
Fuel injectors all working correctly?
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Doctor Gollum

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Re: C30XEI/C30SE wont start
« Reply #2 on: 06 March 2023, 13:07:24 »
Distributor refitted in the correct orientation?

Don't take this for granted... Had a V6 Granada that barely ran following a plug and lead change. Turned out that the distributor had previously been replaced and had been clocked 60 degrees out. Moving the leads one post round cured that.

This won't change the firing order, but it really messes with the timing of the spark vs fuel delivery and consequently the combustion process.
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Anvarv

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Re: C30XEI/C30SE wont start
« Reply #3 on: 06 March 2023, 13:15:14 »
Thanks for fast replys!

Didnt turn the distributor and i think timing hasnt changed. (also distributor cap is not 180c wrong, its correct)

Injectors and car worked 3 weeks ago. Today there is no even pop and bang in the combustion chamber.

Compression test was 10-11bar in every cilinder.

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Re: C30XEI/C30SE wont start
« Reply #4 on: 06 March 2023, 13:21:51 »
It needs fuel, spark and air to run. Something is missing.

Were the plug leads also changed?

Anything else unplugged in the process?
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Anvarv

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Re: C30XEI/C30SE wont start
« Reply #5 on: 06 March 2023, 13:26:38 »
Plug leads are used, but in good condition and clean.

At the moment i fount out when i crank, i have only 1.25V of power in injector.

Should it be 12V?
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Re: C30XEI/C30SE wont start
« Reply #6 on: 06 March 2023, 13:29:31 »
Does it state the working V on the injector itself?

They're driven by the ECU, possibly via a 12v relay, so it's possible that the 1.5v is the reference voltage.  :-\

You didn't say if the leads had been removed from the distributor or not :-\
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LC0112G

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Re: C30XEI/C30SE wont start
« Reply #7 on: 06 March 2023, 13:37:17 »
One end of the injector should be at battery voltage - 12V ish - when measured to chassis/battery negative terminal. If it isn't then either the injector relay has packed up, or a fuse is blown.

The ECU grounds the other end of the injector to operate them - but only for a few miliseconds at a time. You won't be able to measure 12V across the injector plug/socket itself with a voltmeter.

What sort of car are we talking about since you mention C30SE? Is it Carlton/Omega A/Senator?
« Last Edit: 06 March 2023, 13:39:20 by LC0112G »
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Anvarv

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Re: C30XEI/C30SE wont start
« Reply #8 on: 06 March 2023, 13:39:34 »
Quote from: Doctor Gollum on 06 March 2023, 13:29:31
Does it state the working V on the injector itself?

They're driven by the ECU, possibly via a 12v relay, so it's possible that the 1.5v is the reference voltage.  :-\

You didn't say if the leads had been removed from the distributor or not :-\

Sorry, yes they were removed.

Firing order is 153624. Double checked.

Quote from: LC0112G on 06 March 2023, 13:37:17
One end of the injector should be at battery voltage - 12V ish - when measured to chassis/battery negative terminal. If it isn't then either the injector relay has packed up, or a fuse is blown.

The ECU grounds the other end of the injector to operate them - but only for a few miliseconds at a time. You won't be able to measure 12V across the injector plug/socket itself with a voltmeter.

Where i can find relay for injectors?

It is Omega Evolution 500.
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LC0112G

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Re: C30XEI/C30SE wont start
« Reply #9 on: 06 March 2023, 13:49:28 »
Quote from: Anvarv on 06 March 2023, 13:39:34
Where i can find relay for injectors?

It is Omega Evolution 500.

Assuming the EVO500 is the same as a normal C30SE Omega A, then it'll be in the engine bay, left hand side (same side as the steering wheel on a LHD car), just behind the suspension turret. There will be 4 or 5 relays and a bunch of fuses there.

It's possible the relay is activated by an alarm/immobiliser system. Have you got all the correct alarm fobs?
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Anvarv

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Re: C30XEI/C30SE wont start
« Reply #10 on: 06 March 2023, 14:07:26 »
Got it.

Much green in those relays. Gonna clean them later.

There is no alarmsystem.
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Doctor Gollum

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Re: C30XEI/C30SE wont start
« Reply #11 on: 06 March 2023, 14:40:55 »
Quote from: Anvarv on 06 March 2023, 13:39:34
Quote from: Doctor Gollum on 06 March 2023, 13:29:31
Does it state the working V on the injector itself?

They're driven by the ECU, possibly via a 12v relay, so it's possible that the 1.5v is the reference voltage.  :-\

You didn't say if the leads had been removed from the distributor or not :-\

Sorry, yes they were removed.

Firing order is 153624. Double checked.

Quote from: LC0112G on 06 March 2023, 13:37:17
One end of the injector should be at battery voltage - 12V ish - when measured to chassis/battery negative terminal. If it isn't then either the injector relay has packed up, or a fuse is blown.

The ECU grounds the other end of the injector to operate them - but only for a few miliseconds at a time. You won't be able to measure 12V across the injector plug/socket itself with a voltmeter.

Where i can find relay for injectors?

It is Omega Evolution 500.

Mark one lead and post with something visible, then move all the leads one post to the left. If no change, one to the right. And so on :y
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Anvarv

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Re: C30XEI/C30SE wont start
« Reply #12 on: 07 March 2023, 08:31:05 »
So.

Cleaned the relays and no victory. :(
Also changed some relays to make sure.

When ignition ON, there is 12V in the injector harness when voltmeter is from injector pin to battery negative terminal.

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Doctor Gollum

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Re: C30XEI/C30SE wont start
« Reply #13 on: 07 March 2023, 10:08:07 »
And the leads?
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Anvarv

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Re: C30XEI/C30SE wont start
« Reply #14 on: 07 March 2023, 12:34:28 »
Quote from: Doctor Gollum on 07 March 2023, 10:08:07
And the leads?

Fine, right order and all good.
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