I have no injector pulse on no.5, is there a separate wire for every injector at the pcm??

 

Yes. All injectors are 'sourced' with +12 and each control side wire runs all the way back to the PCM. Can have an open in wire (unlikely) or a bad connection in the PCM plug (more likely) or a defective trigger circuit in PCM (bad news).

However, a real 'sneaky' problem that can cloud the issue. Address all other problems ahead of looking at injectors. (ie: if you have a P0356 code (primary or secondary electrical problem on No. 6) - PCM knows it can't fire if it wanted to, and will shut off the injector to keep from dumping raw fuel into the CAT). ALSO - on my truck I had a HARD MISFIRE (dead - dead spark plug) and the PCM would shut off the injector on an opposing firing order cylinder on the other bank. Damn thing idled fairly well and drove me nuts looking for WHY injector wasn't working. When I addressed the misfiring plug, the injector on the other bank "HEALED" itself.

 

Interesting, because yes this is still the p056 issue, had power and signal to coil and injector at 6, checked 2 all fine there, checked 5 and no injector pulse.....again unplugged cam sensors and then had pulse at 5.....

 

I have checked and re torqued all plugs cleaned plug holes
like this things stuck in open loop, replaced plug 6 again with new plug, no difference, also rechecked and cleaned no 6 pigtails on injector and coil.

 

How about test results ---mode six results . Unplugging cam sensor must go back to a default condition . Then no 6 fires proving circuit intact? Clean all connectors including crank

sensor. Are all connectors locking on . Inspect crank sensor wires down by compressor ./ do plugs have new boots / springs -- clean cop contacts .

 

Definitely haven't checked crank sensor yet, will check it out, this happens with old cops or new(albeit $80 set)

Edit: this is in a different post, but when cam sensors are plugged in it sets pending codes on coils 4,5,6 and 8, then the code that sets the light is p0356.

 

Test results in torque pro will give you raw computer counts towards setting a cel. It also tells you the max threshold of counts setting cel .Ideally you want zero and is achievable . Maybe time to compression check no 6 .but the failing injector pulse is probably caused by pcm shutting it down .This sounds like its timing related The crank sensor is key to timing as well as the reluctor wheel on crank sending it . crank wire underneath is easily damaged doing ac comp or starter.
But truthfully I don't see a clear path yet.
The 12vdc is standing on injectors and cops they have two different sources but it jumps from one cly to another in groups .Each item has a pcm wire that is grounded by output of pcm at the right time . The pcm decides a cyl is working by the crank kick at the time its supposed to fire if it gets the boost or not .
Have you tested any injectors or cleaned them . Of course the valves come into play and a worn roller wheel can impact this ,mine threw one to the side and missed cam . Too many questions here .

 

Thanks for all the input red tried to get under there this morning before I had to go do an estimate find a crank sensor wire connection. Pretty crowded in there and I didn't have enough time the still going to check it later.still new to torque pro and figuring it out has a lot of info there.
when this all started he would run bad for 10 maybe 15 miles and then clear out and run like a bat out of hell the rest of the day hopefully just electrical related thank you again for all your help so far

 

Ahhh, the problem is you're under water, salt water, it will short everything out. GPS Height is -29.5 ft. (LOL) (JK)

SERIOUSLY NOW ***

Are you saying that you have _NO_ control wire pulse on injector #5 and cop #6 - WHEN the 'bank 2' CPS sensor is plugged in - AND conversly _DO_ have pulses when CPS is umplugged, but are getting P0356 (primary/secondary circuit fault on COP #6? ??

If I'm understanding you correctly - that is crazy makes no sense.

How are you determining there is NO control wire pulses??? I don't like nor trust noid lights. As bizzar as that sequence, I would be wanting to check control pulses with an o'scope.

The experience I related in Post #2 above at least has a logical explanation. I had an absolutely DEAD-DEAD spark plug on #1, an found PCM was not triggering injector #6 on the opposite bank ((exactly opposite cylinder in the firing order)). DAMN engine idled 'fairly well'.

You might try what I did. Installed an old spark plug in the head, inserted test plug in the boot and grounded plug cathode with jumper wire, plugged COP connector in and started the engine. NO SPARK AT ALL w/ BAD PLUG, but new one would spark blazes like crazy. Installed new one - EVERYTHING cleared up.

 

I saw that reading also!!!lol!
Yes no pulse on 5 injector (had to use test light) and p0356 with cam sensors plugged in.
Unplug both cam sensors then I have pulse on 5 and no p035* codes.....
I installed new plug-in 6 but now thinking back maybe I should replace five and check spark there

 

Exactly! When you go to start the engine, as the engine starts to turn, the PCM looks for the missing tooth signal from the CKP sensor, which signifies top dead center on cylinder #1. That should be enough for it to figure out what coil to fire next and which injector to fire next, EXCEPT that the PCM doesn’t know if #1 is TDC on the exhaust stroke or TDC of the power stroke. So that is why they have a CMP (CaM Position) sensor. Since the camshaft turns at half crankshaft speed, by looking for the CMP sensor signal it can determine which stroke #1 is on.

When the engine starts to turn, if the PCM doesn’t see a CMP sensor, it says, “Hey, I’m pretty smart. If cyl #1 is NOT on the power stroke, than cyl #6 must be on TDC of its the power stroke! So he fires both cyl #1 AND #6 and fires the next two injectors to see if he can get it to fire up.

But if you unplug the CMP sensor WHILE it is running, it won’t bat an eye because it has already figured out what stroke #1 is on when it gets the signal from the CKP sensor.

I’d be curious if you unplugged the CMP sensor WHILE the engine is running if #6 would begin firing.

 

Hmmmmm, could give it a try, although when checking before I believe I had power and signal to 6 (coil and injector, with test light)but not to 5 injector.
I have ran around bin so many circles though I will have to check again...
Like I stated above, engine stays in open loop with everything hooked up, afr goes insane (over 16.51),
Cams unhooked=closed loop