Yeah, I thought about that, but I would think I would at least get a few starts before another pump is destroyed.

I can hear it prime, but I'm thinking something else might not be quite grounded right.

Searching the forums now for grounding points to review tomorrow.

 

Have you checked the compression on each cylinder?

Seems like thats the only thing that could be left.......maybe your fuel pressure regulator too....hmmm

 

I was just asking Frank that. The list for tomorrow is to test compression, check grounds, injectors, and now the regulator.

Can I rule out the regulator by getting a definite value with a pressure tester on the fuel rail? I know I'm getting a good amount of pressure because it sprays pretty hard when I depress the valve. Dont have a pressure tester. A stop by Harbor Freight is in order I suppose.

If everything checks out I guess I'll go snag an ECM from the yard.

 

Also make sure you check pressure run off from the fuel rail.

 

gotta drop the tank and physically look inside....no kidding!....it took months of back/forth and try this and fix that by my mechanic, before i found the jeep notice and told him to drop the tank and take a gander inside...it was sludge and crap that even boiling wouldn't get out...the factory tanks are crap and will destroy your fuel system components every time!....get a new tank!.... it's less than $100 and you will not have to replace any more pumps/filters/etc.!!! (of course, new pump and filter are implied with a new tank - just to be sure.) ....oh, by the time we figured that out, i also had to replace the battery from all the stalling and restarts!!!....good luck!

look here for refurb ecm.... click top right logo for "Auto Computer Exchange".... http://www.wfaw.net/index_files/gif_13.html
here for jeep parts... http://www.wfaw.net/index_files/gif_12.html

 

Compression test results:

1- 116psi
2- 118
3- 110
4- 110
5- 120
6- 123

Everything is within spec except 3 and 4 are a little low, but should be enough.

Have to get the wifey from work, I'm going to check the grounds next. Near as I can tell theres one one the firewall, block and tranny dipstick. Am I missing any?

 

Grounds look okay. I cleaned the oil and crap around them and theyre tight.

Fuel pressure peaks at 35-40 psi.

Think all thats left I can do to diagnos this is to pull the fuel rail and see if the injectors squirt anything.

Outside of that grabbing a computer from the yard, I can't think of anything else except maybe soldering the cps wires together, though the connectors appear clean and tight.

@#$(^!!!!!!!!!!! #$%&*!!!!!!!!!!! @#$^*!!!!!!!!!!!!!!!!!

 

I would pull the fuel rail off and make sure your injecters are working. What do your spark plugs look like?

 

Plugs weren't too bad. Pretty decent actually. I put them in about 3 months ago. Small amount of carbon but nothing to write home about.

I just pulled the ECM from under the dash and wiggle some wires still just cranks away.

Injectors next. I'll pull the rail with them on and have someone turn while i see if they're spitting, shouldn't I hear them click?

 

BIG UPDATE

I removed the fuel rail with the injectors attached and not one sprayed even a drop!

SO, knowing I'm getting pressure to the fuel rail, how do I fix the injectors? Anyone know?

 

Traced the line down and found that my knock sensor is busted up. Can this keep it from starting or having the injector pulse? Also, on the same line where the connection for the knock sensor is is another connector that seems to go no where. It's 2 prong it appears and kinda small. It's not the O2 sensor plug because that is there and connected to the O2 sensor. Anyone know?

 

takes 3 things to make any engine run... spark... air/fuel mix and compression... pull injector rail reaplace o rings... and have some one crank over while its out and see if injectors spray...
do a compresion check....
and do you have spark when cranking ?

 

Think I may start a new thread so I can summarize everything.

I checked compression, cylinder 1-116psi, 2-118, 3-110, 4-110, 5 -120, 6-123. I have spark from the coil to the distrib and from the distrib to the plugs. I pulled the rail and NONE OF THE INJECTORS SPIT AT ALL. The fuel rail reads around 35psi though.

As I mentioned before, the injectors aren't spraying anything. Not one drop. I suspect something is jacked there, but the only thing I can find is that the ECM controls the injectors.