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Intermitten Spark - Won't start


 
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fousto
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Joined: 13 Sep 2005

PostPosted: Tue Sep 13, 2005 7:59 pm    Post subject: Intermitten Spark - Won't start Reply with quote

95 grand limited 6 cyl

has a little spark once in a while - even sparked a little when I turned off the key - like a timing issue.

Tried to strart but not enough spark

What up!!

Thanks for anyone with a idea.
will put on a new rotor and cap in the morn. Coil has resistence
Crank Sensor???????

God don't say ECM - please

thanks -fousto
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Wed Sep 14, 2005 7:55 am    Post subject: Reply with quote

I would start with a CPS.. Thats probobly all you have to do...
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fousto
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Joined: 13 Sep 2005

PostPosted: Thu Sep 15, 2005 10:17 am    Post subject: Reply with quote

Swamp Boy
Thanks I found it up on the bellhousing - I think
I can't tell where it plugs into - looks like it goes through the firewall.
Is there a picture or good diagram around

thanks - fousto
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Thu Sep 15, 2005 1:07 pm    Post subject: Reply with quote

it should plug up very near to where it is.. Dont think it goes thru the firewall..

Unscrew it and pull it out and follow the wire as you gently pull...

that should do it...

Carl
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fousto
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Joined: 13 Sep 2005

PostPosted: Sat Sep 17, 2005 10:20 am    Post subject: Reply with quote

Well new CPS still won't start.

There appears to be no power going to the coil with the ingnition switched on. Where is the source of the coil power???
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swamp boy
Cherokee Muderator
Cherokee Muderator


Joined: 01 Jan 2004
Location: New Orleans LA.

PostPosted: Sat Sep 17, 2005 2:42 pm    Post subject: Reply with quote

The coil power comes from the ECU>.. But its triggered by the CPS..

If you have changed the CPS and the Coil still isnt getting power Ummmmm

Crap..I dont know..




OK.. Lets try something else. It wont start at all and you have a new CPS..


Hmmm... are you checking voltage to coil when starting or only with key on??

Have you tried changing the coil??

I know with an old engine the Ballast resistor will burn out and you will not get power to the coil with the key on.. I dont know what replaced that in the New FI engines... I will do a little research and see if I can find something out...

If I where home I would look in my FSM but since I am 200 miles from home and havent been able to return yet.. (I am returning Monday) I really cant do much more than look around the internet..


Carl
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fousto
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Joined: 13 Sep 2005

PostPosted: Sat Sep 17, 2005 5:08 pm    Post subject: Reply with quote

swamp boy

I am not getting 12 volts to the coil plug. where is that resister located??

I will check the connection on the new cps but as I can see that goes to the dist and I would still need a powersource for the coil.

thanks a lot I am in no hurry - I will just keep working away at it.
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fousto
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Joined: 13 Sep 2005

PostPosted: Thu Sep 22, 2005 6:32 am    Post subject: Reply with quote

Ok here is where I am at
There is not balast resistor on a 95 GC
There is no hot lead going to the coil

My question is does the hot lead to the coil come from the powertrain control module????
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