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Cranks

Tiny
DON30ALD1
  • MEMBER
  • 2004 JEEP CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 98,000 MILES
Car cranks won't start first time usually starts after second crank. Now it's getting worse it threw two O2 sensor codes today I pulled the negative cleared the codes in hopes they would come back and I can't pull a code again.
Some symptoms cranks no start then eventually cranks over.

Stalls at light sometimes

Running rough

I thought crank sensor now I'm wondering about o2 sensor even though it's not throwing codes now. How can I check each sensor w a multimeter all 4 sensors to see if there working.
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Wednesday, March 23rd, 2016 AT 6:26 PM

16 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuel pressure with a gauge and check for a vacuum leak like broken or hoses off. Auto parts rent gauge
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Thursday, March 24th, 2016 AT 7:17 AM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
P1490 (M)
Low Speed Fan CTRL Relay Circuit Circuit it's throwing this code would this cause the cranking issue
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Thursday, March 24th, 2016 AT 4:22 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Nope that means your fan has a problem on low speed
do what I said in first reply
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Thursday, March 24th, 2016 AT 4:39 PM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
HMAC I can't find a Schrader valve I found this on the rail my buddy says that's a fuel damper where else would the Schrader valve be to check the PSI
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Thursday, March 24th, 2016 AT 5:15 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See pic should be 43 psi +-5psi. Also try resetting security system first if no manual look on line on how to reset
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Thursday, March 24th, 2016 AT 5:21 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
See pic
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Thursday, March 24th, 2016 AT 5:22 PM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
I will check again in the day light but I been all over the rail it's not where the pic is. Can it be someplace else possible
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Thursday, March 24th, 2016 AT 5:42 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
No if it is not there where specified then you will need an adapter
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Thursday, March 24th, 2016 AT 5:45 PM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
HMAC is there another way to check the psi if no Schrader valve can I check it at the gas cap?
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Thursday, March 24th, 2016 AT 6:26 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
No you need an adapter for the fuel line to attach a gauge or a pro can do it with a scanner with no adapter.
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Friday, March 25th, 2016 AT 7:00 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Did you try resetting security system like I had stated earlier
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Friday, March 25th, 2016 AT 7:00 AM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
Thanks taking it in to a PRO. I give up
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Friday, March 25th, 2016 AT 7:01 AM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
HMAC 300 after all this and still not finding the issue radiator sprung a leak brought an after market online and it came w 2 threaded fittings for the trans cooler lines however mine are connected to the air condition cooler radiator. Will it be difficult to find caps for this and have you ever experienced this.
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Wednesday, March 30th, 2016 AT 5:40 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If you don't hook up any lines to the ones on radiator nothing will go in or out. You'll have to find out if the connections are metric or us then you may find a plug at hardware store if you want to plug the h oles, but normally only trans fluid goes through there and if you aren't using it don't worry about it.
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+1
Thursday, March 31st, 2016 AT 6:04 AM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
Awesome cool I'll let u know how all turns out thanks for everything
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Thursday, March 31st, 2016 AT 6:50 AM
Tiny
DON30ALD1
  • MEMBER
  • 13 POSTS
HMAC thanks for all the advise come to find out it was the fuel filter. I would have never thought that being that I replaced it 6 months ago. Thanks again
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Thursday, April 14th, 2016 AT 5:32 PM

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