Real rich?

Have you tested your IAT and CTS when this happens?

 

Pretty rich. Can smell it just standing with hood up. CTS is brand new. Doesn't have 10 miles on it. I cleaned the IAT & moved it to the air box last week.
The fuel pressure is not leaking down like it was before the new pump. Before, hot or cold when I shut it off it would go to zero in just a very few minutes. Now it doesn't.
According to the pdf I read on the net if I had HNS & the pressure dropped more than 20 in 30 minutes it would be the pump. That didn't fix it. The FP regulator is new(NAPA)
Something thermal is all I know. Dang if I can find it.
Rare for the ECU to blink isn't it?

 

Very rare on the ECU.

Ever disconnect it and look at the connections?

 

I'm gonna do that in the AM. I just did the leakdown again for the pump & regulator & pressure didn't drop but about 10 psi in 30 minutes.

 

Cruiser’s Renix ECU Connector Refreshing

Many times when other fixes have failed, it becomes necessary to eliminate the ECU to harness connections as a cause. This requires removing the ECU.

Up under the dash, to the right of the steering column is the ECU. It is held in by three 10mm headed bolts to a bracket. It’s most easily removed using a ratcheting wrench but a socket will work.

Once you get the ECU down, unplug the two harness connectors from it. Visually inspect the connectors and pins.

Using a good quality electronics cleaner, liberally spray both of the harness ends and the ECU pin area.

Now, take a small pick or a dental tool and go to the harness connectors. Using the tool, tweak each female receptacle in the harness plugs so they will grasp the ECU pins more tightly.

Plug the harnesses back on to the ECU and reinstall it. I usually only use two of the bolts because the third is a bear.

Revised 07/11/12

 

I just put 10 gallons of fuel in. Drove back to the house & decided to park it & leave her running. Temp is just a bit below 210. Good idle, smooth. I walk off for maybe 5 minutes & come back by & she's skipping pretty good. Not near as smooth. RPM's are getting lower. Temp is still the same. 5 minutes later she stalls out.
I reach in & she fires right up but runs pretty ruff. I shut her down & wait 10 minutes & she won't start.
What about the gagging while sitting there just idling? Does that tell you anything?

 

Something is getting hot over time. Perhaps a connection? ECU?

 

If you rev it good before it dies, u get black smoke? sounds like it's "loaden up" granted this has zigged and zagged everywhere, but had you pulled a plug after it died and found it black, that would be info there. You checked the MAP ground?

* The problem started after unknown injectors were installed.

You find less than an ohm from this, V , MAP ground to bat NEG? (and you triple checked the tube)

 

Revved smoke is not black.......at all. 1 minute I think it's loadin up & the next I think it's starvin. I know last week when I had HNS I yanked the plugs out & they are white & dry & no gas smell from the plug holes.

I'll check MAP ground AM. It's new but it may be bad on the other side. It's like Cruiser said......something is getting hot & messin up my world.

May be those damn injectors. Wonder if that type is prone to vapor lock? Something else to dig at.

 

I have a bunch of data on injectors, but without the numbers on them I can say nothing. Just verifying what you put in there prior to the problem popping up seems to make sense. I've learned more than half of anything I know regarding fuel injection from Pete. Just we keep different hrs, and now and then I catch something.

I think you can just unplug the IAT and ECT to rule them out. (A real pro might not be eager to suggest such a stone-age straggly). You might even meter the Jeep side wires to see if the signal to the ECU is grounding.

I really doubt the ecu pins will connect better when you open the hood, no harm in checking them. A poster the other day needed to do a better job cleaning his contacts between his coil and module, you might re-visit that while you are checking that MAP wiring tomorrow. There's stuff in this link below btw.
http://www.lunghd.com/Tech_Articles/...iagnostics.htm

 

Got her good & warm this morning. This was after I tested MAP ground & tested the new coil. Both checked OK. Disconnected IAT & she cranked cold but ran bit ruff until I plugged it back up.
Drove for 8 miles & got her really warm. Went home & shut down for 5 minutes. No start.
She did start with about 4 shots of starting fluid. Ran terrible for about 15 seconds then leveled out. Left her running & she bogged out after less than 10 minutes.
What does that say?

 

Fuel issue.

 

OK I just got her started & pulled each plug wire & have a good, steady blue spark. Idle doesn't change much at all with 1 pulled at a time. Then I put an in-line spark tester on each plug. Looks strong & steady on each. While in the process of testing in-line she starts sputtering & trying to stall. I reach over & throttle up & she levels out until I let her sit a few more minutes. So I'm thinking maybe I'm on the wrong side of the Jeep.
I jump wired the ballast resistor during HNS & nothing changed. No start. I have new fuel relay also. With the BR hooked back I have about 8 volts when running. That's spot on right?
Moving to the fuel side of the riddle. I have a new BOSCH fuel system. New NAPA regulator. Re-man BOSCH injectors. I do some digging in my notes.
The day we put the FR & Inj's in we started her up & she ran ruff as hades for a few minutes. Black smoke & spittin & sputtering. After a few minutes of driving she kinda cleaned out & ran better with no smoke or stutter. Gas mileage was & is terrible though. Then the HNS started.
So now(due to process of elimination) I'm thinking either the FR is bad or the injectors are crap.
BWTHDIK

 

I'm with you on this one..

 

Ok this saga is getting stranger by the hour. I have been driving her just a few miles here & there cause of the HNS. During these little runs I think I keep smelling something hot or melting or burning but it is so faint I disregard.
Anyway after My plug test I let her cool down & a few minutes & decide to run to Office Depot (1/2 mile) to get a can of gas duster for electronics. They have a non flame kind so I was gonna get her hot & spray the "new" CPS during HNS & see what happened. Kinda cool the sensor real quick just to see if it was a bad MOPAR CPS.
I get home & leave her running while I run inside for about 3 minutes.
I come out & the dang thing is almost in flames.

Smoke EVERYWHERE. Coming from underneath the middle of the Jeep. I grab my fire ext. out of my truck look underneath & the NEW MAGNAFLOW cat convertor is blazing red & melting the undercoating. The floorboard under is white hot. I spray the s*** outta it. Open the doors & the carpet dang near melting. This was installed about a month ago cause the old cat. was rattling & I figured why not. (started to run a straight pipe) Now I ain't never seen anything like this. Is something backing up my exhaust & dang near starting fire & causing HNS?

WTHIGO?