help, please!!!!!!!!stuck out of town - Page 6 - Diesel Forum

tbpower · 11-02-2009, 05:18 PM

I don't know but here is a bump. Did you unplug the icp sensor? I would also verify fuel pressure.

Dirtcheap · 11-02-2009, 07:23 PM

yes i did unplug it, no change.. no idea on fuel pressure.. ill have to order the fuel bowl adapter and a gauge

**klhansen** · 11-02-2009, 07:36 PM

Your issue could very well be injectors. Those velocity change #'s looked high for #'s 1, 2, 3, & 5. Maybe one or more of them is hanging, causing ICP problems. Your velocity change scan put #2 on the list along with the ones that failed the CCT.

I didn't see anything jump out at me on the other numbers. ICP, IPR duty cycle, inj pulse width, and RPM all look OK for an idling engine.

I don't think you can get a turbo rpm reading with AE on a 7.3L, so don't know abou that one.

Also don't know about PCM bitmap flags.

Exhaust back pressure might be just a smidgen high at 16.46 psi. It should be pretty much atmospheric at idle.

Dirtcheap · 11-03-2009, 01:02 PM

by hanging do you mean stuck open?? which might accountfor the raw fuel smell?? any way to fix them without replacement??

Dirtcheap · 11-03-2009, 01:12 PM

could bad orings account for this??

Dirtcheap · 11-05-2009, 07:34 PM

i guess im gonna just start replacing injectors... i can get reman. inj. locally for $150 ea.. is it really worth it to get brand new ones?

jerome b. · 11-08-2009, 10:45 AM

Quote:

Originally Posted by Dirtcheap

i guess im gonna just start replacing injectors... i can get reman. inj. locally for $150 ea.. is it really worth it to get brand new ones?

Dirtcheap

Your problem is near and dear to me. I have the same year 7.3. I have not seen a resolution to your problem. Have you figured out what it is (or hopefully what it was?) I've been on the road for the last week or so and still am. Inquiring minds really would like to know the cause of your problems. Thanks

Jerome B.

Dirtcheap · 11-08-2009, 11:14 AM

jerome.. i havent as of yet... im gonna pull the injectors and pray its something simple like orings...

**klhansen** · 11-08-2009, 05:37 PM

Quote:

Originally Posted by Dirtcheap

by hanging do you mean stuck open?? which might accountfor the raw fuel smell?? any way to fix them without replacement??

Scratch that comment about injectors hanging up.

What I meant was that if the pintle valve that controls the oil flow to the injector was hung up, it could continuously discharge oil to the VC area and affect the HP oil pressure. Your ICP and IPR duty cycle readings didn't reflect that.

If you can get a block-off adapter for the HPOP hoses, you can check to see if you have leaking o-rings. That's what I did to find my first batch of leakers. I ran a test using AE, monitoring ICP, IPR, and Engine RPM, first with both banks connected. I got 500 ICP, ~11.7% IPR at 650 RPM. Then I plugged off the right bank and got ~525 ICP, ~11.72-12.11% IPR at 650 RPM. Then I reconnected the right bank and plugged off the left bank and got ~600 ICP, 12.5-13.28% IPR at 650 RPM. That indicated that the HPOP and IPR had to work harder to maintain pressure in the right bank, so I pulled those injectors. Found one with the top o-ring completely blown out, and a couple of others looking sickly. A week later, I nearly got stranded, so just replaced the left bank o-rings, finding two blown out. Just yesterday, I ran the same test with both banks connected and saw 470 ICP, 11.3 IPR, at 650 RPM, which indicates to me that the system is leak-free. You can see pics of my injectors in my thread titled "The Smoking Gun".

Comparing your ICP and IPR reading to mine should help you decide if your o-rings are leaking, but I'm not sure that's your problem. More can go wrong with injectors than just leaking o-rings.

Dirtcheap · 11-29-2009, 09:30 PM

im looking for any reason not to replace the injectors, so i rechecked the the uvch, but this time i checked at the valve cover not just at the male plug for the uvch..i got different readings this time... last time all glow plugs were .6 and all inj. were 3.0 or 3.1... this time i got .2 and .3 for glow plugs and 2.7,2.8,2.9...does this make a hill of beans diff. in my situation?? $60 perside for valve gaskets is alot cheaper than inj.

Dirtcheap · 12-14-2009, 09:56 PM

i just finished installing 5 new injectors and much to my disappointment things arent really any better... it still wont stay running... oddly enough my s.e.s light has now gone off.. even with 3/4-full throttle it wont rev above 1100 rpm...im getting really frustrated with it, and dont know what to do.. i topped off the h.p.o.p res.. (not romps just wont stay running) im open to suggestions...thanks as usual

CPUNeck · 12-14-2009, 10:42 PM

Hey what voltage is your alternator putting out? I've seen diodes go bad, and pass AC current through a DC system and royally piss the electronics OFF. If you have a multi-meter, check for AC voltage also, even if your getting a good 14.x volts DC.

Have you monitored your TPS signal to ensure the PCM is getting the correct throttle call? (I'm reaching a little here, but you've done a lot to this thing)

You really need to hook up a gauge to the fuel system and see what's happening under load.

GL

Dirtcheap · 12-15-2009, 07:22 PM

according to the idiot gauge its right where its supposed to be..14v.. the fuel is new and the bowl is full every time i open it.. it ll shoot out the drain under pressure if i leave the key on acc and open the valve..where is/how do i get to the idm??

**Flywheel** · 12-15-2009, 07:57 PM

Just a thought - If it got progressively worse, there may be a problem with cam/valve/piston? A compression test might be in order to rule that out.

You may also want to confirm injectors by watching the spurt of oil coming from them.

Dirtcheap · 12-15-2009, 08:42 PM

i do need to get a spare cps... the injectors shot out oil when i spun the motor by hand to purge the cylinders after replacing the injectors.. yes it did come on over time..