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99 dodge caravan, 94k miles. On hot humid days after ...
Sent to Car Experts October 07 11:16 AM

99 dodge caravan, 94k miles. On hot humid days after driving around for about an hour. Van sputters and engine quits. after about a 15 minutes rest. Van starts smell rich exhausest and there is small sputtering back fires. Took it to dodge dealer they said fuel injectors were leaking replaced all injectores and up stream o2 sensor. a week later same condition same symtom. replaced downstream 02 sensor. Week later same thing with conditions and driving time again Van stalls sputters and quites untill things cool down. I am leaning toward a fuel pump problem but why would this only happen on days when the outdoor temp is above 80*
Could I have a computer problem when it gets above 80*

please help and thanks for listening!

Customer (name blocked for privacy)
Status:  Closed   Value: $5
Answer
October 7 4:43 PM (5 hours and 26 minutes and 47 seconds later)
         
REPLIEDCheck Mark

You need to first test a few functions during the failure.

1) Test for spark at the plug end of the wire using a spark tester.
2) Test for injecter pulse using a small bulb called a noid light.
3) Use a fuel pressure gauge to test for correct fuel pressure.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.

Here's what the noid light looks like.

Images available only to Customers.



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1 Other Expert Agrees with this!
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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
Reply
October 8 10:42 AM (17 hours and 58 minutes and 54 seconds later)
         
Reply to Hammer Time's Post: The tough part is that after the Van settles down it runs correctly. therefore, when fule pressure is measured it will read properly or the van would not run at all. I wish the darn thing would just quit and stay that way so the diagnosis would be easier. So should I still insist to my mechanic that he checks the fuel pressure?
Customer (name blocked for privacy)
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October 8 10:48 AM (6 minutes and 13 seconds later)
         
continued from first reply....
All of these test that were recommended would only suface as a problem if they were checked while the van is expericeing the problem. once the van settles all funtions operate properly.

Customer (name blocked for privacy)
Answer
October 8 5:25 PM (6 hours and 37 minutes and 34 seconds later)
         
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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
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October 8 7:40 PM (2 hours and 14 minutes and 33 seconds later)
         
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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
ASE Mastertech with Adv level Engine performance cert.
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October 9 12:04 AM (4 hours and 24 minutes and 12 seconds later)
         
Is this a test that my mechacanic should install for me to read the data or guage when problem occurs. That was one of his main concerns was not being able to re-inact the same condition as this problem indicates
Customer (name blocked for privacy)
Answer
October 9 8:08 AM (8 hours and 3 minutes and 57 seconds later)
         
ACCEPTEDCheck Mark
I gave you my method of doing it. He has his own (or lack of). he has to be willing to put that much effort annd time into finding the problem. Many shops won't do that. They can charge you for time spent doing this also.

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Hammer Time -- L1 Master Technician -- 98% Positive Feedback on 2714 Car Accepts
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