Re: 96 Grand Cherokee Stalling
 

DougW wrote:
> When I was having problems in my 93 I found out the napa part with harness was needed. This was the same coil Jeep installed to
> solve an earlier idle problem. The harness has an internal resistor.
>
> The coil gets 12v from the ASD relay, make sure it's pins are clean. Actually you might swap that relay with the AC or Fog relay
> just to make sure.
> DougW

Doug,
What is the "harness" you're referring to with the coil? The
wiring harness? I'll try swapping out the ASD relay with something
harmless, too.

Thanks again,
Doug B.

Re: 96 Grand Cherokee Stalling
 

dougguitar wrote:
> DougW wrote:
>> When I was having problems in my 93 I found out the napa part with
>> harness was needed. This was the same coil Jeep installed to solve
>> an earlier idle problem. The harness has an internal resistor.
>>
>> The coil gets 12v from the ASD relay, make sure it's pins are clean.
>> Actually you might swap that relay with the AC or Fog relay just to
>> make sure.

> Doug,
> What is the "harness" you're referring to with the coil? The
> wiring harness? I'll try swapping out the ASD relay with something
> harmless, too.

The two connector plug that goes to the coil. About 95-97 Jeep had a TSB for coil problems, the fix included a new coil body and a
short harness wire that adapted the old connector to the new coil. That wire had a built-in resistor. I'm not sure what year they
incorporated that into the existing build. I got it in from Napa as part# IC409 http://tinyurl.com/y9yk8y

--
DougW

Re: 96 Grand Cherokee Stalling
 

dougguitar wrote:
> DougW wrote:
>> When I was having problems in my 93 I found out the napa part with
>> harness was needed. This was the same coil Jeep installed to solve
>> an earlier idle problem. The harness has an internal resistor.
>>
>> The coil gets 12v from the ASD relay, make sure it's pins are clean.
>> Actually you might swap that relay with the AC or Fog relay just to
>> make sure.

> Doug,
> What is the "harness" you're referring to with the coil? The
> wiring harness? I'll try swapping out the ASD relay with something
> harmless, too.

The two connector plug that goes to the coil. About 95-97 Jeep had a TSB for coil problems, the fix included a new coil body and a
short harness wire that adapted the old connector to the new coil. That wire had a built-in resistor. I'm not sure what year they
incorporated that into the existing build. I got it in from Napa as part# IC409 http://tinyurl.com/y9yk8y

--
DougW

Re: 96 Grand Cherokee Stalling
 

dougguitar wrote:
> DougW wrote:
>> When I was having problems in my 93 I found out the napa part with
>> harness was needed. This was the same coil Jeep installed to solve
>> an earlier idle problem. The harness has an internal resistor.
>>
>> The coil gets 12v from the ASD relay, make sure it's pins are clean.
>> Actually you might swap that relay with the AC or Fog relay just to
>> make sure.

> Doug,
> What is the "harness" you're referring to with the coil? The
> wiring harness? I'll try swapping out the ASD relay with something
> harmless, too.

The two connector plug that goes to the coil. About 95-97 Jeep had a TSB for coil problems, the fix included a new coil body and a
short harness wire that adapted the old connector to the new coil. That wire had a built-in resistor. I'm not sure what year they
incorporated that into the existing build. I got it in from Napa as part# IC409 http://tinyurl.com/y9yk8y

--
DougW

Re: 96 Grand Cherokee Stalling
 

dougguitar@yahoo.com wrote:

> According the engine code chart on Doug Wilson's excellent web page, a
> code 43 can be either of the following:
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> What in particular should I try wiggling?

Hmmm. I'd start with all coil-related connections, including any
resister packs it may have. I don't have the schematic in front of me
or I could be of more help to you. I've used an ohmeter with safety-pin
probes in the past to detect internal wiring problems, but I have a
feeling this is just a connector-related problem.

Re: 96 Grand Cherokee Stalling
 

dougguitar@yahoo.com wrote:

> According the engine code chart on Doug Wilson's excellent web page, a
> code 43 can be either of the following:
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> What in particular should I try wiggling?

Hmmm. I'd start with all coil-related connections, including any
resister packs it may have. I don't have the schematic in front of me
or I could be of more help to you. I've used an ohmeter with safety-pin
probes in the past to detect internal wiring problems, but I have a
feeling this is just a connector-related problem.

Re: 96 Grand Cherokee Stalling
 

dougguitar@yahoo.com wrote:

> According the engine code chart on Doug Wilson's excellent web page, a
> code 43 can be either of the following:
>
> 43 Peak primary circuit current not achieved with maximum dwell time.
> 43 Misfire detected in one or more cylinders 1 thru 6. (4 and 6 cyls.)
>
>
> What in particular should I try wiggling?

Hmmm. I'd start with all coil-related connections, including any
resister packs it may have. I don't have the schematic in front of me
or I could be of more help to you. I've used an ohmeter with safety-pin
probes in the past to detect internal wiring problems, but I have a
feeling this is just a connector-related problem.

Re: 96 Grand Cherokee Stalling
 

I switched out the ASD relay with the wiper relay, but alas, no luck.
The vehicle ran fine on the way into work this morning, but coming
home, I was doing about 60 mph on the local freeway, when all of a
sudden it loses power and starts to cut out. I shifted into neutral and
gave it some gas. It then started to run awful, shaking and vibrating,
like it was running on one or two cylinders. Then it somehow righted
itself as I was about to pull over, running OK again, and I made it the
rest of the way home.

It didn't add any new codes. It still just has the five separate code
43's on the odometer.

I'm almost at the point of throwing in the towel and taking it to a
shop for diagnosis, but I hate to start paying someone else to guess at
the problem. I guess I can try wiggling the wires tonight and see if I
can make anything happen. I'm running out of ideas.

DougW, question: You said if the distributor rotor moves from side to
side, it's shot. By side-to-side, I assume you mean motion from the
center of the rotor towards the outer diameter of the distributor
(i.e., along the length of the rotor). Mine has maybe a little over a
1/16" of play in that direction. Is that a concern? Could that cause my
symptoms?

Thanks for all the help.

Doug B.

Re: 96 Grand Cherokee Stalling
 

I switched out the ASD relay with the wiper relay, but alas, no luck.
The vehicle ran fine on the way into work this morning, but coming
home, I was doing about 60 mph on the local freeway, when all of a
sudden it loses power and starts to cut out. I shifted into neutral and
gave it some gas. It then started to run awful, shaking and vibrating,
like it was running on one or two cylinders. Then it somehow righted
itself as I was about to pull over, running OK again, and I made it the
rest of the way home.

It didn't add any new codes. It still just has the five separate code
43's on the odometer.

I'm almost at the point of throwing in the towel and taking it to a
shop for diagnosis, but I hate to start paying someone else to guess at
the problem. I guess I can try wiggling the wires tonight and see if I
can make anything happen. I'm running out of ideas.

DougW, question: You said if the distributor rotor moves from side to
side, it's shot. By side-to-side, I assume you mean motion from the
center of the rotor towards the outer diameter of the distributor
(i.e., along the length of the rotor). Mine has maybe a little over a
1/16" of play in that direction. Is that a concern? Could that cause my
symptoms?

Thanks for all the help.

Doug B.

Re: 96 Grand Cherokee Stalling
 

I switched out the ASD relay with the wiper relay, but alas, no luck.
The vehicle ran fine on the way into work this morning, but coming
home, I was doing about 60 mph on the local freeway, when all of a
sudden it loses power and starts to cut out. I shifted into neutral and
gave it some gas. It then started to run awful, shaking and vibrating,
like it was running on one or two cylinders. Then it somehow righted
itself as I was about to pull over, running OK again, and I made it the
rest of the way home.

It didn't add any new codes. It still just has the five separate code
43's on the odometer.

I'm almost at the point of throwing in the towel and taking it to a
shop for diagnosis, but I hate to start paying someone else to guess at
the problem. I guess I can try wiggling the wires tonight and see if I
can make anything happen. I'm running out of ideas.

DougW, question: You said if the distributor rotor moves from side to
side, it's shot. By side-to-side, I assume you mean motion from the
center of the rotor towards the outer diameter of the distributor
(i.e., along the length of the rotor). Mine has maybe a little over a
1/16" of play in that direction. Is that a concern? Could that cause my
symptoms?

Thanks for all the help.

Doug B.