Author Topic: Weird car problem  (Read 744 times)

Offline Leslie

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Weird car problem
« on: January 19, 2007, 09:31:43 PM »
Thought I might submit this automotive problem for your consideration.  The mechanics seem puzzled by what is going on, and I figgured someone here may know what to look for.  I hope my description of events below isn't too confusing.

I recently had a new carburetor installed on my '73 Olds 98.  The first two didn't work and I sent the car back to the shop.  I noticed when I got the car back the first time that sometimes the Temp light blinked on startup...not every time but sometimes.  They thought the wires to the thermostat were knocked loose from working around the carb.  They reconnected the wires, thinking that would fix the blinking Temp light concern.  I also had someone at the shop drive the car to a muffler shop to grind and gasket the leaking exhaust manifolds.  

When I got the car back it ran fine at first (though the Temp light was still blinking sometimes at start-up.)  After a few days the starter sounded like it was sticking on start-up. When the starter wasn't disengaging, both the Temp light and the generator light stayed on (that's when I would turn off the ignition and re-start the car.)   I had the exhaust manifolds reground and re-gasketed, but this problem with the Temp light blinking was going on before the manifold job.  The starter wasn't sticking before the exhaust manifold job.  [Prior to the sticking starter phenomenon, the mechanics at the shop thought it might be a loose wire to the thermostat caused from working around the carburetor.  They simply reconnected the wires better, thinking that would fix it.]

The other night about 3 AM I was grocery shopping at Wally World, and the starter stuck and I turned the ignition off and re-started.  Radio and heater fan didn't come on until I put the car in gear.  Drove about a quarter mile and the car's engine just went dead (radio and heater fan, headlights etc. all worked.)  Called AAA for a tow truck.

The engine is getting fuel and fire but won't start.  I was thinking maybe it could be the timing chain skipped or broke there at Wally World.  Had that replaced about 6 or 7 years ago...could be time for a new one I suppose.  I drive about 3k miles or less a year in that car.  I don't stress the engine when I drive.  Car has just over 104k on the odometer.  Mechanics speculated the ignition switch was going bad.  Thought someone here may have experience with this sorta thing.  So far, the mechanics say this is a "weird" problem and don't know what it could be. This is a great place to seek answers to baffling car problems.  Thanks in advance for any helpful suggestions and ideas from you motorheads.  




Les

Offline Meatwad

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Weird car problem
« Reply #1 on: January 19, 2007, 10:00:55 PM »
I dont have the slightest idea, but if your mechanic dont have a clue you should ask another mechanic
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Offline sluggish

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Weird car problem
« Reply #2 on: January 19, 2007, 10:16:26 PM »
This is clearly an electrical problem that has been arising for some time.  It's an old car.  My guess is a harness short.  I'd rewire the whole thing.

Offline Sixpence

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Weird car problem
« Reply #3 on: January 19, 2007, 10:52:38 PM »
Quote
Originally posted by sluggish
This is clearly an electrical problem that has been arising for some time.  It's an old car.  My guess is a harness short.  I'd rewire the whole thing.


Where the heater and radio came on when he put it in gear, sounds like it might be a short in the column?
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Offline Leslie

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Weird car problem
« Reply #4 on: January 19, 2007, 11:00:00 PM »
Thanks guys.  Yes, kinda sounds like could be a short somewhere.  Hope it can be discovered somewhere easy to fix.  Would not be a simple job to redo the whole harness.




Les

Offline sluggish

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Weird car problem
« Reply #5 on: January 19, 2007, 11:01:20 PM »
Quote
Originally posted by Sixpence
Where the heater and radio came on when he put it in gear, sounds like it might be a short in the column?
The funny thing is, cars twist and flex, get hot and cool down.  All of this can make a bad connection short out.  I can't guess where it is, but I'd be willing to bet there is a bad connection or broken wire.  This kind of a problem is a nightmare.  that's why I would just rewire the whole thing and be done with it.

Offline rpm

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Weird car problem
« Reply #6 on: January 19, 2007, 11:26:30 PM »
Quote
'73 Olds 98
^^^
There's your problem, right there. GM wiring.
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Offline Debonair

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Weird car problem
« Reply #7 on: January 20, 2007, 12:36:09 AM »
i got a ground spped indicator that frequently sticks at 42 MPH:noid :noid :noid :huh :huh :huh :huh

Offline WhiteHawk

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Weird car problem
« Reply #8 on: January 20, 2007, 06:52:30 AM »
sounds like the keyswitch is bad.  The coil can only keep fire to the plugs when the keyswitch is in RUN, or start.  MAybe your RUN position is screwed which would make sense since your starter wouldnt disengage.  By the way, are you a classics guy?  If not, discard old POS and get a newer one.

Offline culero

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Weird car problem
« Reply #9 on: January 20, 2007, 07:39:24 AM »
Replace your ignition switch. That should fix it.
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Offline uptown

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Weird car problem
« Reply #10 on: January 20, 2007, 11:18:44 AM »
Yes you have a short in the wiring.Because the starter was sticking and then not working at all, as well as the temp light coming and going, it's very likely to be in or around the ignition switch i.e., (key switch).You have several options here.If you don't have the tools, know how or time, pay a good trustworthy mechanic to fix it. But that will get pretty deep into your pockets.Or you could find the problem yourself with a $10.00 test light and wiring schmetic.Usually shorts will be at connection points,such as wire nuts or splices. There are several automotive electrical manuals on the market that will help the average joe fix any problem. JC WHITNEY is a good place to start.Before I forget, you'll also need a digital mulimeter to check ohms.Any parts store has this for around $20.00, as well as the $10.00 test light. If you ever have any questions just let me know. I do this crap for a hobbie, Believe it or not lol. Good luck and happy motoring!
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Offline WhiteHawk

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Weird car problem
« Reply #11 on: January 20, 2007, 04:42:40 PM »
I would suggest, if youre going to do it yourself to buy a haynes or a chilton manual and follow thier directions.  Their books arent the best, but they will save you a bundle in the long run.  I dont even know how to get a keyswitch assembly out of a car, but I bet that is the problem.

Offline Leslie

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Weird car problem
« Reply #12 on: January 20, 2007, 06:07:39 PM »
If that is the problem, is it possible to bypass the locking ignition switch where the key goes and use toggle switches to start the car?  That is, if getting to the ignition switch would involve damaging the steering column or steering wheel?  Or would that be not feasible or impractical?




Les

Offline uptown

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Weird car problem
« Reply #13 on: January 20, 2007, 06:22:23 PM »
yes , you can bypass the key and use a toggle switch. I have a pulling truck and all the switches are toggled.But I don't advise doing that if you're not sure of what you're doing.If the key is in the column, you'll more than likely be able to unbolt or unscrew the column cover and just unplug the old switch,and plug in the new one.That's where the Chilton manual will be help. It'll guide you thruogh the whole process.If by chance you do have to pull the steering wheel, most part stores will rent steering wheel pullers to you. I'll check my manuals and get back to you
Lighten up Francis

Offline uptown

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Weird car problem
« Reply #14 on: January 20, 2007, 06:48:30 PM »
The closest thing I could find was for a 78 cutlass, and It's pretty straight forward. Just remove the lower dash trim around the column to the point where you can get to the switch, and unbolt it.Bolt the new one in, replace trim and you're good to go. No need to remove the steering wheel at all.
Lighten up Francis