braves7pro

since im not gettin power to my coil could it be my nss. i no when i first got my jeep my back up lights wouldnt come on. now tht the jeep cut off on me and wont start could tht mean my nss has wen out.

braves7pro

i did check to make sure the wires wont melted. i am using the wire tester tht u ground and touch the power source tht lights up when there is power. when i touch the wire running to the cks and the nss is is a faint light. so mayb it is a ground. but when i check the wire running to the coil it has no power.

CoffeeCommando

Not for me. I've been left stranded from a fuel pump dying in mid operation twice.

I've never had a CKS die on my while driving. I had one that was bad right after an engine rebuild, and the other times I literally drove around with 1391.

All times I had a code for P1391. No time have I ever had a code for a fuel pump. That's 2/2 no codes and dead in the middle of driving from a fuel pump, 3/3 I had codes for the crank position sensor that never died on me in mid drive.

Then again I drive the 98 era XJ. Just because they're all an Xj doesn't mean it's all the same. Only the 97 and 98 model years, according to Alldata, have PCM controlled ignitions. And ignitions are told when to spark on those by the PCM. Maybe that makes it more flexible and I can get away with it since the PCM adjusts to correct misfires. Did I still have misfires? Yes. Enough to know to check for codes, and lo' and behold I had 1391.

The one time after the engine rebuild I didn't have a CEL, but hooking up the code scanner showed that the PCM was sensing P1391 even though it hadn't started and drove around.

I know things were goverened differently between certain years. No I don't know exactly what all of them are, but I know that regardless you can't go wrong with the codes. Regardless of the light illumination being there or not.

I only say check for codes because they can only steer you in the right direction if you have them. Otherwise you're just shooting in the dark replacing parts back and forth like others. Knowledge is power. That's why the OBD system is there. Use it.

braves7pro

i check all of the grounds and thy r good.

CoffeeCommando

Define "check" in your own words and tell me your definition of "good". Unfortunately these are all relative terms on the internet.

braves7pro

well i use the wire tester tht i have. the kind tht u clip it on to a ground and touch it to the power source. if it lights up then u have power. so i clip it to the grounds he said and touch it to the battery and the light lite up bright. meaning there was a good ground. and i also disconnected them and sanded them down and reconnected them.

CoffeeCommando

So you completely disconnected your grounds from their grounding points (as in it's touching only air) and then ground the light to the ground and touch positive?

braves7pro

i took them off to clean them. i only tested them while thy were connected

braves7pro

anyone no wat this could b

braves7pro

can anyone help

dukie564

this might seem like a silly question, but you checked all the fuses correct? Engine box and interior box?

dukie564

also swap the ASD (auto shutdown) and A/C relays to see if the ASD relay is bad

dukie564

did you ever check for trouble codes?

braves7pro

yea i check all the fusses and relays. i check all the grounds. i check and made sure there was no wires touching. i bypass the nss to make sure tht wasnt it. have not been able to get the codes check. i tried to do the self check thing to find the codes but it didnt work.

dukie564

borrow a code reader and read for codes before going any further