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misfire no start sometimes
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leftys4js
New User
Jan 19, 2010, 2:26 PM
Post #1 of 4
(1541 views)
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misfire no start sometimes
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Hello i have a 95 grand cherokee 5.2L aprox 185k has been running great until today the wife took it to wal-mart ran fine there. when she left it was hard to start and has a miss she picked me up from work shut it off and it wouldnt start unless i held the gas pedal to the floor.got it home i pulled all the plugs and check the gaps(they were just put in this summer) all looked good there checked all the plug wires and they also were fine..went to the store started ok but still miss..wants to die at stop lights/signs and when you accelerate it has a few second hesitation.when leaving the store it wouldnt start again until i held it to the floor real gassy smell when it started.as the wife describes it is sounds like an old farm truck when its running.. no check engine light..sounds like an old carberated car choking..being on a low budget i really dont have the funds to hit and miss right now so figured this looked like a good place to start..if any one has any suggestions it would be greatly appreciated
thanks
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 19, 2010, 5:01 PM
Post #2 of 4
(1538 views)
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Re: misfire no start sometimes
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CTS or coolant temp sensor may be faulty telling it that it's always stone cold and flooding out,
T
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asleepatdawheel
User
Jan 21, 2010, 1:05 AM
Post #3 of 4
(1530 views)
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Re: misfire no start sometimes
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Check the Coolant sensor and fuel pressure regulator if its easy to get to...Check ignition components for proper operation...
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Its not called bragging,, if you can back it up....
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Sidom
Veteran
/ Moderator
Jan 21, 2010, 11:51 AM
Post #4 of 4
(1526 views)
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Re: misfire no start sometimes
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It depends on what kind of tools you have as to what tests you can run. Without the proper tools to confirm a failure anything is going to be a guess. This is an OBD I system so to even look at a data stream is going to take a rather expensive scan tool as compared to some of the lower end OBD II readers now available.
You said you're on a low budget & I can relate to that but if you can afford it and there is maintenance things that you've been put off as far as "tune up" stuff, now would be a good time to do them.
Off the top of my head the 2 most common things I've seen on those for this type of problem are bad crankshaft position sensors, PCMs & related connecters. You can try gently wiggling the connecter that goes into the pcm while the engine is running to see if that has any effect on how it runs..
If there is any way you can get the codes read on this, it may be helpful in leading you to the problem area... A fuel pressure reading would be good as well.. If you have a spark tester, that would help let you know the strength of the coil.. etc......
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