| From | Message |
Aaron Ohlinger
Guest
3/03/2005
22:02:51
|
 Subject: '89 Plymouth Acclaim
IP: Logged
Message:
O.K. I'm hoping there's a Mopar genious reading this. I have an '89 Acclaim 2.5 TBI. The car is turning, not firing, not getting spark and the reason is I'm not getting power at the positive side of the ignition coil in the RUN position. When I crank the engine the voltage rises to 3-5 volts, which is definetly not what I want. So I'm thinking it's a break in a wire in the circuit somewhere or a fusible link, but my question is, is ther something in the alternator that would cut power to the coil if it went bad, or is there anything else I should be looking at, like the starter circuit, charging circuit or any other circuit connected to the coil. Oh and by the way, getting plenty of fuel, so I don't think it could be the ASD (auto shutdown relay). Any answers or ideas would be much appreciated.
Thanx Aaron
|
Dan
Guest
3/04/2005
15:30:50
| RE: '89 Plymouth Acclaim
IP: Logged
Message:
When the ignition switch is first turned on the ASD relay will momentarily turn on to allow the prime cycle for the fuel pump and then shut off until the computer sees RPM.
If you notice the power loss light on the dash will come on during this time and also shut off.
So you’ll have to check for voltage at the coil during this same time frame.
These older Chryslers had a corrosion problem inside the wiring harness usually with in two feet of the battery. Either the dark blue wire, ignition feed to the ASD from the computer or the dark green/black wire from the ASD to the different out put devices, like the ignition coil, fuel pump, heated O2 sensor and the fuel injector.
Don’t ask me why they did this but inside the loom you’ll find stamp-welded splice connections in both of these circuits, where they split off and go their own way.
These splices are only taped to insulate them and being so close to the biggest corrosion generator the battery, they will get so corroded that the weld will just fall apart.
You may have to start at the ASD relay and carefully open the harness and go looking to find these splices. The worse part of this job is after tracking them down is that you find them intact and have to start looking elsewhere. But you won’t know if they’re good until you find them.
Dan.
|
Anonymous
Guest
3/04/2005
15:55:21
| RE: '89 Plymouth Acclaim
IP: Logged
Message:
another issue with chrysler ignitions was the hall-effect magnetic pickup in the distributor would fail, I don't remember the test procedure, but when I worked for a local chrysler dealership I learned to carry a spare in my car. it sits inside the distributor, under the ignition rotor, and it has a two conducter black wire that comes out of the side of the distributor. maybe someone else here can help you with the test procedure.
good luck,
Tom Carnevale
|
Aaron
Guest
3/06/2005
23:57:23
| RE: '89 Plymouth Acclaim
IP: Logged
Message:
Hey Dan,
Thanx, for the info. Before I got to read your reply, I went over behind the battery and found all the wires and fusible links and the Chrysler plastic stamped splices, and what a mess. Someone must have done a little wiring to the car before me cause there's two fusible links replaced in the charging system and wires are exposed all over the place. So I think you're right about the corrosion. Wow! Thanx for all the info. I'll keep posted on any changes after I do a little fixing.
And Tom,
Good idea too. That was my original thought. That was the first thing I changed believe it or not. It was cheap and since it control's timing advance, I thought it wouldn't hurt to change it even if it wasn't the problem, but no luck. Thanx for the ideas though. Really appreciate any help!
Aaron
|
|
|
