highmileage

Have you checked for a bad relay or two? And it sounds like you may have a hot wire grounding somewhere, with the fact you wired around your fuel pump due to a failure and now your injectors are gone. Sounds like a short in the ignition system or ECU circut.

Redneck_jeep

which relays should i check? and i simply ran a hot to the fuel pump relay and one to a switch its not touching any thing so what should i check for, and could i have made it worse by running it to the relay?

Redneck_jeep

UPDATE: the jeep is now turning over again after fixing the nss iv been told that the distributor could cause my injectors to not pulse if it is not sending the proper signal. i pulled a plug to test for spark and the spark was very weak. could this really be my problem?

DFlintstone

Renix will run and work with the dizy, (cam sensor) unplugged. It's not that.

You can't do much with a Renix without a meter. That $5 HF meter actually works! For a while anyway. (and they are better than the $3 ones on Ebay (believe it or not!)

I'd verify the ACV from the CPS, hands down. You DID clean the gang of wires grounding there on your dipstick stud? I'm not sure if the injectors ground there directly, or there through the ECU.

How did you verify no injector pulse?

DFlintstone

OH! And...swap the 2 and 4th relays! The second, (fuel pump relay), fufills some of the functions the ASD does in newer jeeps Offroad mentioned. (the forth is the AC clutch.

jakbob

Map sensor tells the ECU load, then the ECU determines pulse I believe. Make sure its connected and the hose isn't cracked.

cruiser54

You could unplug that dizzy and it would run. Start looking elsewhere.

Redneck_jeep

i checked the pulse by using a noid light. i did clean the grounds there i even did them all a second time and used degreaser and brake cleaner to get it looking new. im not sure what to check on my map senser nor where it is iv looked in my manuals and its defiently not the right location.

Redneck_jeep

and i dont know what the avc is or located

DFlintstone

There is a brittle little tube. It comes out of a rubber plug, low on the engine side of the throttle body. It runs back to the firewall, then up to your MAP sensor sort of high up there near center on the firewall. CRUCIAL!! The MAP will tell the ECU to dump fuel with less/no vacuum. Any crack or blockage and it will be pig-rich. (black smoke, fouled black plugs). You can pull the line off the MAP and feel for vacuum with your finger. If it runs!



>>>http://www.lunghd.com/Tech_Articles/...iagnostics.htm


Ours don't have an ASD Relay, but you can try swapping the 2'nd one with the fourth, (of those 4 by the battery). There is a diagram found in my signature. I believe the fuel pump relay handles more than just the fuel pump.

Redneck_jeep

okay swapped the relays today looked at my map its ducktaped to the wiring harness tried to start she wanted to but currently empty tank so im on my way to gas station

Redneck_jeep

alright got gas in the tank and with my foot on the petal itll start then instantly die

DFlintstone

It's the rear wire on the ceramic ballast resistor on the inner fender by the air cleaner that goes straight to the fuel pump. The pump needs power of course.

Redneck_jeep

pump has power its making me think its the cps but its brand new and i checked it, its working. 40 psi fuel pressure at the rail its has to be the a.s.s. because itll try to start even start then die instantly plugs smell like gas.

Redneck_jeep

okay so i dug into my wiering harness found where all the wires had fried cut them and ran new ones now the jeep will crank crank crank start backfire run for maybe a second and die and it will do this over and over. im pretty sure i got all the bad wires. going to get more indepth into it tomorrow after work.