cps and fuel related problem
Ok so I think I narrowed down my no start issue to the cps but when I pressed the valve on the fuel rail no fuel sprayed out. Could a faulty cps cause low/no fuel pressure or cause the fuel pump to not work??? Any help is appreciated its a dd and its stuck at work...
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what year is your jeep? Can you hear the fuel pump run?
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Sorry
94 cherokee auto 4x4 I could last night but now I can't?? Don't know why |
to answer your question no a cps wont affect your pump delivering fuel to the fuel rail. You need to check to see if you have power at the fuel pump if you dont then you need to check the fuel pump relay and if I remember correctly the 94 should have an auto shutdown relay too you need to check that if you have power at the pump then I would suspect a bad pump hope this helps
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Ok so I can hear the pump working.....somehow I was able to drive it home then I turned it off and on a few times and it started right up. Now it won't start again..ughhh
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if it wont start now check to see if you have spark if you dont have spark then I would check the crank sensor chrysler crank sensors have a tendacy to not want to work when hot sometimes or you could have a loose connection somewhere too
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I bought the cps today the only one in stock was at autozone but it'll work for now. I just don't want to spend all that time putting it on if its not the problem...I will be changing the fuel filter tomorrow also
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be carefull with the autozone crank sensor I bought one from them and the bolt holes werent drilled right so when I put it on it started but it wouldnt rev and it had a real bad miss I had to slot the bolt holes to get the air gap correct
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Hmmm is there a way to figure out before I try it and have to return it?
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im not sure when I did mine it looked the same but it was off. I would check to see if you have spark the crank sensor tells the computer that the engine is turning and to tell the coil to send spark to the dizzy so check that first.
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if you can scan the comuter for codes it should give a code if the crank sensor is bad or some other problem too
But here is something for you hope it helps |
if you need more diagnostic flow charts just let me know
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Please excuse if this is a dumb question but to test for spark just pull the wire and hold it close to a metal surface correct?
Thanks for the help too man I appreciate it |
yup just lay it next to metal it helps if you have a helping hand
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Ok thanks and if there's no spark then it'd be a problem with the distributor right? Assuming all the fuses are good. What if they all have a spark where else should I look?
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