i have a 2000 xj that won't start. no spark and no fuel replaced cps and nss is good. "no bus" reads on the dash sometimes but no check engine light. could it be the ecm?

 

Without the codes and some background, all we can do is guess until your money runs out.

 

yeah that's why Im stuck. nobody has a reader that i know and its stuck at the house so i can't bring it anywhere.. anyway to test the ecm to see if its working?

 

it shut off three times on my way to work, third time no start so i replaced the cps but no go

 

Buy a cheap scanner, you can charge your friends $25, to pull the codes when their vehicle won't start it will pay for itself in no time.

 

if the check engine lights not on then there's no codes correct?

 

I think you have an ECM problem. Will it start once it cools down for about twenty minutes?

 

no start at all. any way to trouble shoot the ecm?

 

Check all of the fuses first. You need a scanner and a DVOM, along with a trouble tree in order to correctly diagnose a faulty ECM.

 

Incorrect...

 

recomend a decent cheap scanner? seen one at auto zone for 75?

 

Have you checked all fuse for power in and out with key in run position? As stated above ...

 

all the fuses are good and i did check the fuel pumps relay for power and it has it. have not checked anymore for power

 

checked with a con light not a dvom

 

There have been cases where No Bus showed and the fault was traced to a corroded ground connection on the engine.

Check these ground terminals for corrosion and security of attachment. Checking for corrosion means removing the nuts and looking at both sides of the wire ring terminals. If there's any doubt, clean the ring terminals with 320 grit (or finer) sand paper then reattached them.

Here's the location of those grounds. Of course, the 00 and 01 won't have a coil there for reference but the grounds are there.
It's called G101.



Here's what the two trouble making ring terminals look like when not connected. Battery ground cable not shown. That's the coil connector next to them.



Also, check the short ground lead coming off the battery (-) post to the right inner fender. That ground is the main chassis ground. That's an 8 MM screw holding the terminal to the fender. I took mine off the other day and it was very rusty. Used a new bolt to reassemble to the fender. This is called G100.