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87 Cherokee, Dies when Idling Upon Reaching Oper Temp
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RussW
New User
Jun 16, 2008, 4:43 PM
Post #1 of 2
(1344 views)
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87 Cherokee, Dies when Idling Upon Reaching Oper Temp
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My 87 4.0L Cherokee with Throttle Body has started dying when I'm in Freeway traffic after it has reached operating temperatures. If I keep the RPM's up it does not die. When it dies I have to wait sometimes 20 minutes and then it will start again. I have also had success taking off the Negative cable and pausing for a minute or so. It has had a loud fuel pump since I purchased it a few months ago but has just recently started dying. The negative cable is too big for the post as the previous owner used a red positive cable for the negative cable. Based on posts I've seen thus far on this site, I think it may be a case of a poor ground that is somehow affected by engine temperature or maybe crankshaft position sensor or maybe a dirty throttle body. Thank you for the help
(This post was edited by RussW on Jun 16, 2008, 4:46 PM)
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Double J
Veteran
/ Moderator
Jun 16, 2008, 7:47 PM
Post #2 of 2
(1336 views)
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Re: 87 Cherokee, Dies when Idling Upon Reaching Oper Temp
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Hey Russ
Your going to need to determine if its a loss of spark or fuel when it stalls and doesn't restart.
Test for spark .
Take a fuel pressure reading with a fuel pressure gauge.
Its known that the fuel pump has been noisy ,I sure wouldnt rule that out..
Try a dash of starting fluid in the throttle body ..see it it starts or tries to,if so,fuel related.
CAUTION:Use starting fluid carefully and sparingly..<< too much is not good at all >>....a quick,light spray(Very little) is all thats needed....
Jim
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