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 3.0 ignition issues
#775084
12/25/06 09:22 AM
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Joined: Apr 2006
Posts: 20
OP
Need a Spot
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I am having an issue with my 90 model monty(3.0 V6) that I am hoping someone can help with. I am not getting fire to the spark plugs. I have traced the problem to the coil. It has power going to it but for some reason it will not let power through it. I replaced it with anthor one only to have the same result. Any ideas?
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 Re: 3.0 ignition issues
[Re: RabbitInTheMoon]
#775085
12/25/06 06:53 PM
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Joined: Dec 2000
Posts: 6,896
Trail Leader
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That stupid little black box next to the coil will stop fire even if the coil is good. Happened to me.
I just want to tell you both good luck, and we're all counting on you.
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Re: 3.0 ignition issues
[Re: sparkem]
#775086
12/25/06 09:25 PM
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Joined: Feb 2004
Posts: 10,238
Web Wheeler
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The stupid little black box is called the "power transistor". <img src="/forums/images/graemlins/lol.gif" alt="" /> It's the switch that unloads the coil to provide spark at the plug tips.
Frank
'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum
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Re: 3.0 ignition issues
[Re: FrankR]
#775087
12/27/06 02:29 AM
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Joined: Apr 2006
Posts: 20
OP
Need a Spot
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Replaced it today and it didnt work. Any other ideas?
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Re: 3.0 ignition issues
[Re: RabbitInTheMoon]
#775088
12/27/06 02:40 AM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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The ecu controls the spark. What do the codes read? The search function will lead you to the procedure. These ecu's have a habit of dying from capacitor failure, and the cap juice leakage eats the pc board and you're dead in the water. Fishy smell in ecu is a diagnostic. Lots of ecu rebuilders if damamge is not bad.
Not responsible for advice not taken...
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Re: 3.0 ignition issues
[Re: fasteddy]
#775089
12/27/06 03:16 AM
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Joined: Dec 2000
Posts: 6,896
Trail Leader
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This may be stupid, but i have seen it. Make sure the wire going from the coil to the distributor is making good contact.
I just want to tell you both good luck, and we're all counting on you.
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Re: 3.0 ignition issues
[Re: sparkem]
#775090
12/27/06 03:31 AM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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And the dizzy plug to the wiring harness. The dizzy guts tell the ecu the data it needs to compute advance and fire the coil.
Not responsible for advice not taken...
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Re: 3.0 ignition issues
[Re: RabbitInTheMoon]
#775091
12/27/06 11:28 PM
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Joined: Apr 2006
Posts: 20
OP
Need a Spot
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Smells very fishy in the ecu! Anyone have an extra one that they would sell?
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Re: 3.0 ignition issues
[Re: RabbitInTheMoon]
#775092
12/28/06 12:08 AM
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Joined: Jan 2001
Posts: 13,649
Web Wheeler
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Do a search on "ecu repair" and you should get several places that rebuild them, and maybe some that sell them outright, but the core charge may kill you. Also search "capacitors" and I think you'll find a thread that shows what the caps look like and what the leak looks like, and how much damage is repairable.
Not responsible for advice not taken...
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Re: 3.0 ignition issues
[Re: RabbitInTheMoon]
#775093
12/28/06 02:46 AM
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Joined: Feb 2005
Posts: 2,649
Roll Me Over
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I used these folks. Was very very happy with their service. http://www.avproecm.com/index.htm
Michael j
TreadLightly! Trainer
Grasscat III, 1994 Gen 2 Five speed, Stock ( for a little while )
GrassCat II, 1998 Gen 2.5 Locked and loaded. Ran off with Hector.
GrassCat I, 1991 Gen 1 Ran off with Justice.
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