Re: 96 Grand Cherokee Stalling
 

DougW wrote:
>
> Have you replaced the ignition coil?
>
> --
> DougW

Yes. That was the first thing I tried last weekend. I replaced the
distributor cap just now, and still got it to stall out. This time I
had a fuel pressure gage with me. Right after it stalled, I hooked up
the gage, but saw zero pressure. Then I turned off the ignition and
back on, and got a full 49 psi. It started back up, ran less than a
minute and cut off again. This time the fuel pressure gage was still
reading 49 psi. I started it again, and it ran very rough for about a
minute, but the fuel pressure was rock steady at 49 psi.

If not for that initial reading of zero, I'd be confident that it was
not the fuel pump. Naturally, I haven't been able to get it to stall
again while sitting in the yard. I'm really getting tired of having to
do this out in traffic.

Doug B.

Re: 96 Grand Cherokee Stalling
 

DougW wrote:
>
> Have you replaced the ignition coil?
>
> --
> DougW

Yes. That was the first thing I tried last weekend. I replaced the
distributor cap just now, and still got it to stall out. This time I
had a fuel pressure gage with me. Right after it stalled, I hooked up
the gage, but saw zero pressure. Then I turned off the ignition and
back on, and got a full 49 psi. It started back up, ran less than a
minute and cut off again. This time the fuel pressure gage was still
reading 49 psi. I started it again, and it ran very rough for about a
minute, but the fuel pressure was rock steady at 49 psi.

If not for that initial reading of zero, I'd be confident that it was
not the fuel pump. Naturally, I haven't been able to get it to stall
again while sitting in the yard. I'm really getting tired of having to
do this out in traffic.

Doug B.

Re: 96 Grand Cherokee Stalling
 

DougW wrote:
>
> Have you replaced the ignition coil?
>
> --
> DougW

Yes. That was the first thing I tried last weekend. I replaced the
distributor cap just now, and still got it to stall out. This time I
had a fuel pressure gage with me. Right after it stalled, I hooked up
the gage, but saw zero pressure. Then I turned off the ignition and
back on, and got a full 49 psi. It started back up, ran less than a
minute and cut off again. This time the fuel pressure gage was still
reading 49 psi. I started it again, and it ran very rough for about a
minute, but the fuel pressure was rock steady at 49 psi.

If not for that initial reading of zero, I'd be confident that it was
not the fuel pump. Naturally, I haven't been able to get it to stall
again while sitting in the yard. I'm really getting tired of having to
do this out in traffic.

Doug B.

Re: 96 Grand Cherokee Stalling
 

Outatime wrote:
> It doesn't sound like fuel delivery is the problem, especially if it
> will not restart immediately. Translate a code 43 for me: it doesn't
> sound like the OBD that I am accustomed to.
>
> Regardless of what code it is throwing, basic ignition continuity should
> be checked. Intermittant problems are difficult to diagnose and are
> labor intensive. Wiggle testing might be your next assignment.

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?

Thanks,
Doug B.

Re: 96 Grand Cherokee Stalling
 

Outatime wrote:
> It doesn't sound like fuel delivery is the problem, especially if it
> will not restart immediately. Translate a code 43 for me: it doesn't
> sound like the OBD that I am accustomed to.
>
> Regardless of what code it is throwing, basic ignition continuity should
> be checked. Intermittant problems are difficult to diagnose and are
> labor intensive. Wiggle testing might be your next assignment.

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?

Thanks,
Doug B.

Re: 96 Grand Cherokee Stalling
 

Outatime wrote:
> It doesn't sound like fuel delivery is the problem, especially if it
> will not restart immediately. Translate a code 43 for me: it doesn't
> sound like the OBD that I am accustomed to.
>
> Regardless of what code it is throwing, basic ignition continuity should
> be checked. Intermittant problems are difficult to diagnose and are
> labor intensive. Wiggle testing might be your next assignment.

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?

Thanks,
Doug B.

Re: 96 Grand Cherokee Stalling
 

How long will it hold fuel pressure?

Leaking fuel injectors will make restart difficult....... do you get an
initial puff of black smoke when it does start?


<dougguitar@yahoo.com> wrote in message
news:1164576776.170319.260250@45g2000cws.googlegro ups.com...
>
> DougW wrote:
>>
>> Have you replaced the ignition coil?
>>
>> --
>> DougW
>
> Yes. That was the first thing I tried last weekend. I replaced the
> distributor cap just now, and still got it to stall out. This time I
> had a fuel pressure gage with me. Right after it stalled, I hooked up
> the gage, but saw zero pressure. Then I turned off the ignition and
> back on, and got a full 49 psi. It started back up, ran less than a
> minute and cut off again. This time the fuel pressure gage was still
> reading 49 psi. I started it again, and it ran very rough for about a
> minute, but the fuel pressure was rock steady at 49 psi.
>
> If not for that initial reading of zero, I'd be confident that it was
> not the fuel pump. Naturally, I haven't been able to get it to stall
> again while sitting in the yard. I'm really getting tired of having to
> do this out in traffic.
>
> Doug B.
>

Re: 96 Grand Cherokee Stalling
 

How long will it hold fuel pressure?

Leaking fuel injectors will make restart difficult....... do you get an
initial puff of black smoke when it does start?


<dougguitar@yahoo.com> wrote in message
news:1164576776.170319.260250@45g2000cws.googlegro ups.com...
>
> DougW wrote:
>>
>> Have you replaced the ignition coil?
>>
>> --
>> DougW
>
> Yes. That was the first thing I tried last weekend. I replaced the
> distributor cap just now, and still got it to stall out. This time I
> had a fuel pressure gage with me. Right after it stalled, I hooked up
> the gage, but saw zero pressure. Then I turned off the ignition and
> back on, and got a full 49 psi. It started back up, ran less than a
> minute and cut off again. This time the fuel pressure gage was still
> reading 49 psi. I started it again, and it ran very rough for about a
> minute, but the fuel pressure was rock steady at 49 psi.
>
> If not for that initial reading of zero, I'd be confident that it was
> not the fuel pump. Naturally, I haven't been able to get it to stall
> again while sitting in the yard. I'm really getting tired of having to
> do this out in traffic.
>
> Doug B.
>

Re: 96 Grand Cherokee Stalling
 

How long will it hold fuel pressure?

Leaking fuel injectors will make restart difficult....... do you get an
initial puff of black smoke when it does start?


<dougguitar@yahoo.com> wrote in message
news:1164576776.170319.260250@45g2000cws.googlegro ups.com...
>
> DougW wrote:
>>
>> Have you replaced the ignition coil?
>>
>> --
>> DougW
>
> Yes. That was the first thing I tried last weekend. I replaced the
> distributor cap just now, and still got it to stall out. This time I
> had a fuel pressure gage with me. Right after it stalled, I hooked up
> the gage, but saw zero pressure. Then I turned off the ignition and
> back on, and got a full 49 psi. It started back up, ran less than a
> minute and cut off again. This time the fuel pressure gage was still
> reading 49 psi. I started it again, and it ran very rough for about a
> minute, but the fuel pressure was rock steady at 49 psi.
>
> If not for that initial reading of zero, I'd be confident that it was
> not the fuel pump. Naturally, I haven't been able to get it to stall
> again while sitting in the yard. I'm really getting tired of having to
> do this out in traffic.
>
> Doug B.
>

Re: 96 Grand Cherokee Stalling
 

billy ray wrote:
> How long will it hold fuel pressure?
>
> Leaking fuel injectors will make restart difficult....... do you get an
> initial puff of black smoke when it does start?
>

No, no black smoke on a restart. I haven't timed it, but it holds fuel
pressure pretty well. At least 15 or 20 minutes.

Doug B.