Re: Testing Ignition Module on 88 XJ
 

On Tue, 23 Sep 2003 10:35:23 -0400, noone@yahoo.com wrote:

>I've got a hot stalling problem on my 88 XJ.
>
>The Jeep runs perfectly most of the time, however after several "hot soaks"
>(eg, my wife out shopping), or driven for several miles on the freeway with
>the A/C on the engine just quits while driving down the road.
>
>I first suspected the notorious Crank Position Sensor, which I replaced
>last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>not happy).
>
>I've gone over the ALL the connections in the engine compartment, cleaned,
>inspected and even tightened the female connections on those that looked
>loose. All the grounds and battery cables have been cleaned.
>
>So now I suspect that the ignition control module is the culprit. Before I
>spend $150.00 on a replacement I'd like to know if there is a way to test
>the existing module?
>
>Any advice you could give me would be appreciated.
>
>
>Dave in Columbus


Thanks for the suggestions. I did switch the relays around, thinking that
the fuel pump relay might be failing when hot. No help there. The Jeep
has stalled on me only once and at that time I did check for fuel pump
whine when turning on the ignition. Pump seemed to be running.

I think I'll try my heat gun on the module as suggested. Maybe I can get
it to fail in my garage so I can pinpoint the problem. I wish it would
just fail completely with a cloud of smoke so I'd know exactly what it
causing the stalling problem.

The fuel pump, as far as I know is the original. It will probably wait
until this winter to fail so I can replace it on my back in twenty degree
weather.

Again, thanks for the help!

Re: Testing Ignition Module on 88 XJ
 

In message <52m0nvseukcmr4u0trvo3ru7vhah9t72bl@4ax.com>, "noone@yahoo.com"
wrote:

>I've got a hot stalling problem on my 88 XJ.
>
>The Jeep runs perfectly most of the time, however after several "hot soaks"
>(eg, my wife out shopping), or driven for several miles on the freeway with
>the A/C on the engine just quits while driving down the road.
>
>I first suspected the notorious Crank Position Sensor, which I replaced
>last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>not happy).
>
>I've gone over the ALL the connections in the engine compartment, cleaned,
>inspected and even tightened the female connections on those that looked
>loose. All the grounds and battery cables have been cleaned.
>
>So now I suspect that the ignition control module is the culprit. Before I
>spend $150.00 on a replacement I'd like to know if there is a way to test
>the existing module?
>
>Any advice you could give me would be appreciated.
>
>
>Dave in Columbus

Re: Testing Ignition Module on 88 XJ
 

In message <52m0nvseukcmr4u0trvo3ru7vhah9t72bl@4ax.com>, "noone@yahoo.com"
wrote:

>I've got a hot stalling problem on my 88 XJ.
>
>The Jeep runs perfectly most of the time, however after several "hot soaks"
>(eg, my wife out shopping), or driven for several miles on the freeway with
>the A/C on the engine just quits while driving down the road.
>
>I first suspected the notorious Crank Position Sensor, which I replaced
>last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>not happy).
>
>I've gone over the ALL the connections in the engine compartment, cleaned,
>inspected and even tightened the female connections on those that looked
>loose. All the grounds and battery cables have been cleaned.
>
>So now I suspect that the ignition control module is the culprit. Before I
>spend $150.00 on a replacement I'd like to know if there is a way to test
>the existing module?
>
>Any advice you could give me would be appreciated.
>
>
>Dave in Columbus

Re: Testing Ignition Module on 88 XJ
 

In message <52m0nvseukcmr4u0trvo3ru7vhah9t72bl@4ax.com>, "noone@yahoo.com"
wrote:

>I've got a hot stalling problem on my 88 XJ.
>
>The Jeep runs perfectly most of the time, however after several "hot soaks"
>(eg, my wife out shopping), or driven for several miles on the freeway with
>the A/C on the engine just quits while driving down the road.
>
>I first suspected the notorious Crank Position Sensor, which I replaced
>last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>not happy).
>
>I've gone over the ALL the connections in the engine compartment, cleaned,
>inspected and even tightened the female connections on those that looked
>loose. All the grounds and battery cables have been cleaned.
>
>So now I suspect that the ignition control module is the culprit. Before I
>spend $150.00 on a replacement I'd like to know if there is a way to test
>the existing module?
>
>Any advice you could give me would be appreciated.
>
>
>Dave in Columbus


There isn't a test for the module. Basically, you test everything else, then
replace the module. Many of AMC and Renault's diagnostic procedures started off
with "Using a known good part..." Not very helpful if you have an intermittent
problem that's not present while you're checking it.

One thing you can try is unbolting the module, turning it over and massaging the
underside with the engine running. Sometimes you can get them to quit running
by doing this, verifying the module is bad.

Re: Testing Ignition Module on 88 XJ
 

In message <52m0nvseukcmr4u0trvo3ru7vhah9t72bl@4ax.com>, "noone@yahoo.com"
wrote:

>I've got a hot stalling problem on my 88 XJ.
>
>The Jeep runs perfectly most of the time, however after several "hot soaks"
>(eg, my wife out shopping), or driven for several miles on the freeway with
>the A/C on the engine just quits while driving down the road.
>
>I first suspected the notorious Crank Position Sensor, which I replaced
>last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>not happy).
>
>I've gone over the ALL the connections in the engine compartment, cleaned,
>inspected and even tightened the female connections on those that looked
>loose. All the grounds and battery cables have been cleaned.
>
>So now I suspect that the ignition control module is the culprit. Before I
>spend $150.00 on a replacement I'd like to know if there is a way to test
>the existing module?
>
>Any advice you could give me would be appreciated.
>
>
>Dave in Columbus


There isn't a test for the module. Basically, you test everything else, then
replace the module. Many of AMC and Renault's diagnostic procedures started off
with "Using a known good part..." Not very helpful if you have an intermittent
problem that's not present while you're checking it.

One thing you can try is unbolting the module, turning it over and massaging the
underside with the engine running. Sometimes you can get them to quit running
by doing this, verifying the module is bad.

Re: Testing Ignition Module on 88 XJ
 

In message <4c4d9be.0309231428.76e65795@posting.google.com> , "Rich" wrote:

>L.W.(ßill) ------ III <----------@cox.net> wrote in message news:<3F706836.52DB8946@cox.net>...
>> Make sure your fuel pump is still working, hot, most have been
>> replaced by your year. My test is just to listen for it running, turn
>> the ignition on, and before cranking it should run for about five
>> seconds before it automatically shuts off. Or test the fuel rail for
>> about forty pounds.
>> God Bless America, ßill O|||||||O
>> mailto:-------------------- http://www.----------.com/
>>
>> noone@yahoo.com wrote:
>> >
>> > I've got a hot stalling problem on my 88 XJ.
>> >
>> > The Jeep runs perfectly most of the time, however after several "hot soaks"
>> > (eg, my wife out shopping), or driven for several miles on the freeway with
>> > the A/C on the engine just quits while driving down the road.
>> >
>> > I first suspected the notorious Crank Position Sensor, which I replaced
>> > last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>> > not happy).
>> >
>> > I've gone over the ALL the connections in the engine compartment, cleaned,
>> > inspected and even tightened the female connections on those that looked
>> > loose. All the grounds and battery cables have been cleaned.
>> >
>> > So now I suspect that the ignition control module is the culprit. Before I
>> > spend $150.00 on a replacement I'd like to know if there is a way to test
>> > the existing module?
>> >
>> > Any advice you could give me would be appreciated.
>> >
>> > Dave in Columbus
>
>I just had that happen to me I found a parts store that could test
>mine I have a 85 XJ 2.8 and a new one was $39 Its been fine for two
>months now..

Different animal. You're talking about a GM setup with the small module in the
distributor. The Renix ign. module used in 88 is on the right fender near the
relays and has a coil sitting on it.

>85XJ
>86XJ 3'lift
>85 4x4 chev trk

Re: Testing Ignition Module on 88 XJ
 

In message <4c4d9be.0309231428.76e65795@posting.google.com> , "Rich" wrote:

>L.W.(ßill) ------ III <----------@cox.net> wrote in message news:<3F706836.52DB8946@cox.net>...
>> Make sure your fuel pump is still working, hot, most have been
>> replaced by your year. My test is just to listen for it running, turn
>> the ignition on, and before cranking it should run for about five
>> seconds before it automatically shuts off. Or test the fuel rail for
>> about forty pounds.
>> God Bless America, ßill O|||||||O
>> mailto:-------------------- http://www.----------.com/
>>
>> noone@yahoo.com wrote:
>> >
>> > I've got a hot stalling problem on my 88 XJ.
>> >
>> > The Jeep runs perfectly most of the time, however after several "hot soaks"
>> > (eg, my wife out shopping), or driven for several miles on the freeway with
>> > the A/C on the engine just quits while driving down the road.
>> >
>> > I first suspected the notorious Crank Position Sensor, which I replaced
>> > last week. No joy. Had to have the Jeep towed home last weekend. (Wife
>> > not happy).
>> >
>> > I've gone over the ALL the connections in the engine compartment, cleaned,
>> > inspected and even tightened the female connections on those that looked
>> > loose. All the grounds and battery cables have been cleaned.
>> >
>> > So now I suspect that the ignition control module is the culprit. Before I
>> > spend $150.00 on a replacement I'd like to know if there is a way to test
>> > the existing module?
>> >
>> > Any advice you could give me would be appreciated.
>> >
>> > Dave in Columbus
>
>I just had that happen to me I found a parts store that could test
>mine I have a 85 XJ 2.8 and a new one was $39 Its been fine for two
>months now..

Different animal. You're talking about a GM setup with the small module in the
distributor. The Renix ign. module used in 88 is on the right fender near the
relays and has a coil sitting on it.

>85XJ
>86XJ 3'lift
>85 4x4 chev trk

Re: Testing Ignition Module on 88 XJ
 

On Wed, 24 Sep 2003 04:40:06 UTC noone@yahoo.com wrote:

> On Tue, 23 Sep 2003 10:35:23 -0400, noone@yahoo.com wrote:
>
> >I've got a hot stalling problem on my 88 XJ.
> >
> >The Jeep runs perfectly most of the time, however after several "hot soaks"
> >(eg, my wife out shopping), or driven for several miles on the freeway with
> >the A/C on the engine just quits while driving down the road.
> >
> >I first suspected the notorious Crank Position Sensor, which I replaced
> >last week. No joy. Had to have the Jeep towed home last weekend. (Wife
> >not happy).
> >
> >I've gone over the ALL the connections in the engine compartment, cleaned,
> >inspected and even tightened the female connections on those that looked
> >loose. All the grounds and battery cables have been cleaned.
> >
> >So now I suspect that the ignition control module is the culprit. Before I
> >spend $150.00 on a replacement I'd like to know if there is a way to test
> >the existing module?
> >
> >Any advice you could give me would be appreciated.
> >
> >
> >Dave in Columbus
>
>
> Thanks for the suggestions. I did switch the relays around, thinking that
> the fuel pump relay might be failing when hot. No help there. The Jeep
> has stalled on me only once and at that time I did check for fuel pump
> whine when turning on the ignition. Pump seemed to be running.
>
> I think I'll try my heat gun on the module as suggested. Maybe I can get
> it to fail in my garage so I can pinpoint the problem. I wish it would
> just fail completely with a cloud of smoke so I'd know exactly what it
> causing the stalling problem.
>
> The fuel pump, as far as I know is the original. It will probably wait
> until this winter to fail so I can replace it on my back in twenty degree
> weather.
>
> Again, thanks for the help!

The first one I lost was also an 88 original - after 125k miles. I
could hear it run, the pressure looked good before I started but as
soon as I cranked it the pressure went to zip - pump couldn't even
keep up on start. A cheap fuel pressure tester might save a lot of
cussing.

--
Will Honea

Re: Testing Ignition Module on 88 XJ
 

On Wed, 24 Sep 2003 04:40:06 UTC noone@yahoo.com wrote:

> On Tue, 23 Sep 2003 10:35:23 -0400, noone@yahoo.com wrote:
>
> >I've got a hot stalling problem on my 88 XJ.
> >
> >The Jeep runs perfectly most of the time, however after several "hot soaks"
> >(eg, my wife out shopping), or driven for several miles on the freeway with
> >the A/C on the engine just quits while driving down the road.
> >
> >I first suspected the notorious Crank Position Sensor, which I replaced
> >last week. No joy. Had to have the Jeep towed home last weekend. (Wife
> >not happy).
> >
> >I've gone over the ALL the connections in the engine compartment, cleaned,
> >inspected and even tightened the female connections on those that looked
> >loose. All the grounds and battery cables have been cleaned.
> >
> >So now I suspect that the ignition control module is the culprit. Before I
> >spend $150.00 on a replacement I'd like to know if there is a way to test
> >the existing module?
> >
> >Any advice you could give me would be appreciated.
> >
> >
> >Dave in Columbus
>
>
> Thanks for the suggestions. I did switch the relays around, thinking that
> the fuel pump relay might be failing when hot. No help there. The Jeep
> has stalled on me only once and at that time I did check for fuel pump
> whine when turning on the ignition. Pump seemed to be running.
>
> I think I'll try my heat gun on the module as suggested. Maybe I can get
> it to fail in my garage so I can pinpoint the problem. I wish it would
> just fail completely with a cloud of smoke so I'd know exactly what it
> causing the stalling problem.
>
> The fuel pump, as far as I know is the original. It will probably wait
> until this winter to fail so I can replace it on my back in twenty degree
> weather.
>
> Again, thanks for the help!

The first one I lost was also an 88 original - after 125k miles. I
could hear it run, the pressure looked good before I started but as
soon as I cranked it the pressure went to zip - pump couldn't even
keep up on start. A cheap fuel pressure tester might save a lot of
cussing.

--
Will Honea