Another CPS thread, Brand new CPS, no start
02-10-2018, 01:43 PM
#17
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Year: 1999
Model: Cherokee
Engine: 4.0
that's why I now think it's not the cps, it started yesterday and ran, but now won't start again. I'm now thinking it's an electrical issue so will check all grounds and wiring today and see if I find something.
02-10-2018, 06:07 PM
#18
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Year: 1999
Model: Cherokee
Engine: 4.0
I think I may have to start a new thread as this no longer seems to be a CPS issue.
The new issue is:
When the key is turned to on, everything powers up (radio, heater, etc.) but when I turn the key to start it clicks once (relay click??) and then nothing. I've checked all fuses (kick panel and PDC) and none are blown, am thinking I should replace the relays in the PDC or replace fuses 11 & 19 in the kick panel even if they are not blown?
I've checked and cleaned all grounds, and the battery has tested good (with and without a load) using my battery tester. Am thinking I should take it to a parts store and have them test it to make sure. I'm thinking I should also replace the battery cables. Could my starter be bad though? I'm guessing it's not
The new issue is:
When the key is turned to on, everything powers up (radio, heater, etc.) but when I turn the key to start it clicks once (relay click??) and then nothing. I've checked all fuses (kick panel and PDC) and none are blown, am thinking I should replace the relays in the PDC or replace fuses 11 & 19 in the kick panel even if they are not blown?
I've checked and cleaned all grounds, and the battery has tested good (with and without a load) using my battery tester. Am thinking I should take it to a parts store and have them test it to make sure. I'm thinking I should also replace the battery cables. Could my starter be bad though? I'm guessing it's not
02-10-2018, 10:02 PM
#19
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Instead of replacing anything at all. Start by testing whether voltage is actually making it to the starter. There are quite a few articles, forum posts, and youtube videos regarding starters and how to test them. A test lamp or multimeter would work.
If you get voltage to the starter when the key is turned, but nothing at all happens. Then yes, you have a starter that is bad or going bad. (its probably been getting quite a workout considering the starting problems you have been trying to figure out).
If you don't get voltage to the starter itself, then you check the solenoid for the starter. If it is getting voltage but nothing is happening, then it is probably a bad solenoid.
If you don't get voltage at the starter or solenoid then you start looking at the control side of things in the PDC (relays, fuses).
So the thread went from what seemed like crank-no-start ignition problem (no spark?) to a no-crank (starter not activating). The ignition and starting systems both depend on your ignition switch to be working correctly. Have you inspected the ignition switch for damage, wiring/connector condition, and proper function?
If you get voltage to the starter when the key is turned, but nothing at all happens. Then yes, you have a starter that is bad or going bad. (its probably been getting quite a workout considering the starting problems you have been trying to figure out).
If you don't get voltage to the starter itself, then you check the solenoid for the starter. If it is getting voltage but nothing is happening, then it is probably a bad solenoid.
If you don't get voltage at the starter or solenoid then you start looking at the control side of things in the PDC (relays, fuses).
So the thread went from what seemed like crank-no-start ignition problem (no spark?) to a no-crank (starter not activating). The ignition and starting systems both depend on your ignition switch to be working correctly. Have you inspected the ignition switch for damage, wiring/connector condition, and proper function?
02-10-2018, 11:35 PM
#20
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Year: 1999
Model: Cherokee
Engine: 4.0
Instead of replacing anything at all. Start by testing whether voltage is actually making it to the starter. There are quite a few articles, forum posts, and youtube videos regarding starters and how to test them. A test lamp or multimeter would work.
If you get voltage to the starter when the key is turned, but nothing at all happens. Then yes, you have a starter that is bad or going bad. (its probably been getting quite a workout considering the starting problems you have been trying to figure out).
If you don't get voltage to the starter itself, then you check the solenoid for the starter. If it is getting voltage but nothing is happening, then it is probably a bad solenoid.
If you don't get voltage at the starter or solenoid then you start looking at the control side of things in the PDC (relays, fuses).
So the thread went from what seemed like crank-no-start ignition problem (no spark?) to a no-crank (starter not activating). The ignition and starting systems both depend on your ignition switch to be working correctly. Have you inspected the ignition switch for damage, wiring/connector condition, and proper function?
If you get voltage to the starter when the key is turned, but nothing at all happens. Then yes, you have a starter that is bad or going bad. (its probably been getting quite a workout considering the starting problems you have been trying to figure out).
If you don't get voltage to the starter itself, then you check the solenoid for the starter. If it is getting voltage but nothing is happening, then it is probably a bad solenoid.
If you don't get voltage at the starter or solenoid then you start looking at the control side of things in the PDC (relays, fuses).
So the thread went from what seemed like crank-no-start ignition problem (no spark?) to a no-crank (starter not activating). The ignition and starting systems both depend on your ignition switch to be working correctly. Have you inspected the ignition switch for damage, wiring/connector condition, and proper function?
That being said, I will look up how to test the starter in order to rule it in or out as the issue. I have inspected the ignition and it all seems fine and dandy
02-11-2018, 07:57 AM
#21
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Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
Hey All,
I know CPS's have been covered a thousand times, but I cannot seem to find the answer I'm looking for.
The problem:
Jeep died a while ago (cps failed), so I ordered a new one and installed it this morning, went to fire it up and no start. None of the gauges are reading out, odometer doesn't show anything, the only thing that happens when the key is in the start position is the starter is spinning. The new cps is a crown automotive replacement (part no. 56027866AE) so I believe is the correct sensor for a '99 (early 1999).
From what I understand I need to test the voltage of the new sensor to see if it is faulty, but am not sure how? I'm guessing the sensor is bad out of the box, but don't want to make that assumption until I test it.
Thanks in advance
I know CPS's have been covered a thousand times, but I cannot seem to find the answer I'm looking for.
The problem:
Jeep died a while ago (cps failed), so I ordered a new one and installed it this morning, went to fire it up and no start. None of the gauges are reading out, odometer doesn't show anything, the only thing that happens when the key is in the start position is the starter is spinning. The new cps is a crown automotive replacement (part no. 56027866AE) so I believe is the correct sensor for a '99 (early 1999).
From what I understand I need to test the voltage of the new sensor to see if it is faulty, but am not sure how? I'm guessing the sensor is bad out of the box, but don't want to make that assumption until I test it.
Thanks in advance
07-23-2020, 10:16 PM
#23
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Year: 1999
Model: Cherokee
Engine: 4.0
Not 100 percent sure on this, but pretty sure I ordered a Mopar CPS and it resolved the issue....The jeep has now got a new motor, this one ended up throwing a rod...lol. I will say that with most sensor issues I've had with other jeeps since, Mopar sensors seem to have greater success than aftermarket ones.
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07-25-2020, 01:03 PM
#24
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Year: 1998 Classic (I'll get it running soon....) and 02 Grand
Model: Cherokee (XJ)
Engine: 4.0
Yet another case of hair pulling caused by aftermarket sensors. Happens all the time.
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