Cadillac Owners Forum banner

1 - 11 of 11 Posts

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #1
Yesterday I picked up a packet from Rockauto - 8 spark plugs Ac Delco 41-987. Today I founded them - no improvement, on autolite 104 which I founded 2 months ago worked the same. Before the replacement, he set error P 0300. The error condemns the general loss of ignition - no cylinder indication ... Candle replacement procedure retained, all electrical connections clean ...
Take a look at these few photos - maybe you will notice something disturbing.
I have to keep trying - maybe one of the high voltage coil cassettes? How to diagnose them? With single - no problem, and in this case? Maybe you have any idea for an effective diagnosis of this problem?

Thanks beautiful. Jack
 

Attachments

·
Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
·
86,626 Posts
If you have a parts store that will run codes for you, they can usually come up with which cylinder is misfiring. The code will be 301, 302, 303, etc.

The only other way would be to remove the ignition cassette and lay it aside. The connect conventional spark plug wires from the cassette to each plug and use an inductive timing light to look for a misfire on each wire.

Don't overlook the possibility of a vacuum leak or even a dirty TB.
 

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #3
I also thought about checking each of the cassettes - only if scaled at atmospheric pressure is easier to make than in the cylinder at an angle? This may distort the test result, but the real one - with high inefficiency it may be so far out of reach ... The question is such a test safe? I will take out two cassettes, maybe turn off the fuel pump, plug in the candles. It will only be necessary to route the main "-" from the external electrode to the jekiegoś with elements of the engine or body ...

The issue of leakage - I controlled it with home access by spraying the agent - I did not notice anything.

Do you use such solutions of coil cartridges as in Nortstar after 2000, can you use the coil voltage measurement in both windings with an oscilloscope, or even the resistance measurement of an ordinary meter? Do you want to do this Since the breaks are in one housing? There are 7 pins in the power plug of each cartridge - do you need to use a meter to measure? Maybe some of you have already analyzed this topic, or struggled with similar problems - I will be grateful for advice.

Thanks. Jack
 

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #4
I am after control - I made such makeshift operations and after turning off the engine - everywhere there are strong, clear sparks ... I don't know - you may need to find a leak somewhere on the intake manifold, use it with a throttle ...

Gentlemen - what is the point in the middle of the head with the remains of the green bar - some mass, "-" pole?
I apologize for the poor quality of the pictures - but I prefer to have a good car than a phone :)



Thanks for anything.
 

Attachments

·
Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Joined
·
68,007 Posts
The coil cassette ground spring contacts the bottom of that hole. The contact surfaces must be clean and metal shiny - a faulty ground will cause spark miss.

There should be nothing but clean metal in the bottom of those ground spring holes.

coil-boot-plug 2.JPG coil-boot-plug 1.JPG DSCN0188.jpg
 

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #6
The green stripe looks factory-made, so I didn't do anything with it ... Should I clean these surfaces to bare metal and remove its embrace?

I know that maybe you guys get tired of my writing in English, my problems, but I am alone with this here ... Hardly anyone wants to help me ... I can - I fix, work alone ... Everyone who could help - they only served only BMW, Mercedes, Audi and all European blandness ... I am asking for every tip. Thank you again.
 

·
Registered
1998 STS
Joined
·
128 Posts
I had rough idle and solved with MAF cleaner spray; after replacing coil packs, plugs, cleaning fuel injectors which didn't work
 

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #8
Gentlemen.

In search of causes P0300 is waiting for a set of suction manifold / throttle seals - I want to eliminate vacuum leaks in systems ... But back to the merits - please reset please add the added photo.

On both covers, in the holes where the cassette spring touches the ground, a green stripe is visible -
the one on the head closer to the cabin is very regular, without rubbing like on the front from the photo.


Initially, I wanted to go to clean up, but seeing the same on my head, I decided to consider it a factory solution and left it. Is this a sputtered material with increased conductivity? Maybe you remember it when you removed your engine coil cartridges? Maybe you don't want to be there?

Best regards. Jack.
 

Attachments

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #9
Welcome.

Yesterday I replaced all intake manifold gaskets, plenum, throttle gasket. One of the pvc rubber bends was cracked - I replaced them for new ones. Several collector seals were badly deformed, but the fact - plenum rubber was not damaged. Result - "Currently P0300 ..."

I guess I need to focus on the indications for cylinder numbers with no ignition - this is especially helpful.

Gentlemen, I have already been on two such tests - both devices are not able to indicate the operation of the cylinder with misfire. Can you advise me what device would handle this?

Thank you.
 

·
2000 STS in Poland
Joined
·
66 Posts
Discussion Starter #10
Hello

Check the compressed pressure - on a cold engine of 155 psi, I did not on a warm test - the warmed northstar would fry me during work, and more I meant the glaring differences between the cylinders. On Monday I was to go to the engine diagnostics - one that would show me the numbers of cylinders with falling out ignition. I put everything together again, in the place where the cassette was placed (2,4,6,8) I put on a visually damaged devil. I started the engine - the controller warning about the malfunctioning of the flow system does not work, do not smell the egg from the exhaust and the engine accelerates the car in a way unknown to me - it is wonderful! I think it worked!

I have only one question for you. At idle, the perceptible sensation of P0300 Error is gone, it's driving like crazy, all but a gentle "jiggling" of the engine - maybe this is how it should be?

Regards. Jack
 

·
Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
·
86,626 Posts
Every Northstar I have had (4) have idled as smooth as if it where shut down.
 
1 - 11 of 11 Posts
Top