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Unread 12-06-2013, 04:27 PM   #1
Mushu1431
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97 cherokee sport won't start

97 cherokee has spark has fuel at the rail replaced cps still nothing. I noticed that if I prop the throttle open all the way it tries to start like it wants to pop off but won't, it won't start with starting fluid either, all the gauges work no check engine light good compression, giving me a headache! Help please!

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Unread 12-06-2013, 04:32 PM   #2
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Oh and it's a sport 4.0
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Unread 12-06-2013, 04:40 PM   #3
CJ7-Tim
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Are all the tune-up parts fresh ? Have you tested the fuel pressure ? Did you try numerous times to start the engine and flood it ? How old is the battery ?
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Unread 12-06-2013, 04:42 PM   #4
tjwalker
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You mentioned it has spark, but does it have GOOD spark. You must have a snapping, BLUE spark to start the engine. White/orange/yellow indicates a weak spark which is not likely going to start the engine.

A weak spark is usually caused by a faulty ignition coil. The coil can be tested for both primary and secondary resistances with a manual and a meter.

Good luck and keep us udpated!
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Unread 12-06-2013, 04:45 PM   #5
Mushu1431
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All new cap rotor plugs wires coil pickup plate, pulled all the plugs out and cranked it around to blow out any fuel, starting fluid in the cylinders, haven't checked fuel pressure yet but I pushed the needle in on fuel rail and sprayed out really good
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Unread 12-06-2013, 05:03 PM   #6
Sycoglitch
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So you go to start the jeep. You turn the key and you hear the engine crank correct? And it only turns over with your foot on the gas peddle or it never turns over. Possible TPS issue

Sent from the jeep cause my owner is drunk again
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Unread 12-06-2013, 05:14 PM   #7
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yeah cranks over fine
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Unread 12-06-2013, 05:15 PM   #8
Sycoglitch
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Quote:
Originally Posted by Mushu1431
yeah cranks over fine
It cranks just doesn't turn over. And when you put your foot on the gas she turns over?

Sent from the jeep cause my owner is drunk again
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Unread 12-06-2013, 05:26 PM   #9
Mushu1431
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spark wasn't blue.
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Unread 12-06-2013, 05:30 PM   #10
Mushu1431
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wont run at all, if I crank it with the gas pedal all the way to the floor it huffs n puffs like its about to turn over. if I try and crank it without the pedal down it just cranks
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Unread 12-07-2013, 03:33 AM   #11
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I am sure someone will correct me if I am wrong but when you hold the pedal to the floor you are cutting off the fuel pump. On the old carb vehicles you used to have to do this when they flooded.
Pull the plugs and let it air out overnight. It's probably so wet in there that's why it won't start. I have never sprayed starting fluid in the cylinders directly, you should only need to spray it in the air inlet.

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Unread 12-07-2013, 06:50 AM   #12
Sycoglitch
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Wait have you had the battery load tested to? A don't just replace the TPS. There should be a write up either here or on cherokee forum about testing with a multi meter
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Unread 12-07-2013, 08:56 AM   #13
Mushu1431
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battery is only 4 months old
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Unread 12-07-2013, 09:20 AM   #14
Sycoglitch
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Quote:
Originally Posted by Mushu1431 View Post
battery is only 4 months old
Im giving you the easy free things to check.still do it. Another free thing to try it this.

Get in jeep. Turn key to accesory. Don't start. Turn key off. Turn to accesory again. Let the fuel pump prime three times. After that then start. If jeep starts you may have a bad check valve. These are the free things to check. Im still leaning towards TPS so test that
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Unread 12-07-2013, 01:16 PM   #15
Mushu1431
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Tried the prime the fuel pump, didn't work. Put a new coil on still nothing, pulled plugs all have a little gas on them, aahhh! About to pull some hair out
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