Reply With QuoteDollarBill wrote:
Fuel pump?
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Jeep: 95 GC Won't Start
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- 06-10 11:27 PM #1DollarBillGuest
95 GC Won't Start
So my 95 GC won't start now. Ran fine yesterday. Security light is NOT
flashing so I know it's not that pain in the ass. It turns over just fine.
The voltmeter looks a bit low, between 11 and 12 volts, but since it turns
over fine and everything lights up good, I'm sure it's getting voltage, plus
it turns over just fine.
I checked the coil wires and distributor cap and it looks intact. I'm
pretty mechanically inclined but am at a loss of where to start. I suppose
first things first I need to check to see if it's getting spark. I know the
old trick of pulling a plug and grounding it but don't really like to do
that for safety reasons.
Any ideas here?
Thanks,
Bill
- 06-11 01:25 AM #2DavidGuest
Re: 95 GC Won't Start
- 06-11 01:34 AM #3DollarBillGuest
Re: 95 GC Won't Start
"David Speight" <net> wrote in message
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Oh crap...never thought of that...how would I test that? Pull the hose
coming out and turn the ignition on?
- 06-11 03:53 AM #4DavidGuest
Re: 95 GC Won't Start
DollarBill wrote:
I was thinking you might check the resistance across the leads.
If the resistance is infinite, you have an open circuit (broken wire in the
winding).
Your idea should work as well, but be careful. Gas and sparks don't mix
well.
Did you check the fuses? It probably isn't them, but it's way to easy to
check not to start here.
Also because it's easy to check, pull a spark plug wire and check for a
spark using a spare plug (any size will do if the cable fits it, like one
from a lawn mower).
- 06-11 01:03 PM #5EdwardGuest
Re: 95 GC Won't Start
You didn't mention the engine you have. Check the crank position sensor
(CPS). The 4.0L will have this but I'm not sure off hand if the V8 does. It
will be on the bellhousing. That can definitely cause the problem you are
seeing. That provides the signal to fire the injectors and can manifest as a
fuel problem. I have a '90 XJ and it did the same thing. CPS was the fix.
About a $30 part.
The TPS (Throttle Position Sensor) on the throttlebody can also cause
heartburn so check that too.
"DollarBill" <net> wrote in message
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- 06-11 01:37 PM #6DollarBillGuest
Re: 95 GC Won't Start
"Edward Rock" <net> wrote in message
news:BiBqe.2346$news.atl.earthlink.net...
Okay...it's not getting any spark. I guess I need to now start working
backwards. Since the SECURITY warning is not lit, I'm assuming that it is
not the problem. I'll be in the garage and checking back from time to time.
Thanks,
Bill
- 06-11 05:19 PM #7DollarBillGuest
Re: 95 GC Won't Start
"DollarBill" <net> wrote in message
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Replaced cap, rotor, coil. Still no spark.
Ideas?
- 06-11 07:23 PM #8DollarBillGuest
Re: 95 GC Won't Start
"DollarBill" <net> wrote in message
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Okay, have voltage going to the coil, no voltage at the cap. Somebody told
me there was a control something or other in the distributor body.
Ideas?
- 06-11 07:47 PM #9DollarBillGuest
Re: 95 GC Won't Start
"DollarBill" <net> wrote in message
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I've been told it's the crank position sensor. Where the hell is that?
- 06-12 08:11 PM #10LonGuest
Re: 95 GC Won't Start
DollarBill proclaimed:
You should be able to hear the pump for a coupla seconds when you
turn on the key.
Unless the pump is totally dead, you should get *some* firing when
cranking. You can drop a spoonful of gas into the throttle body if
you are careful...that will give at least a couple firing cylinders.
You might want to try a small neon bulb to see if you are getting
spark...which would make the crank position sensor high on the
list of suspects.
And get a battery charger to keep the battery from going dead while
troubleshooting the rest.
Any trouble codes if you do the three-key off on cycles?
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