Where did I go wrong?

mandkole · Apr 10, 2015

Gearhead said:
One would think that an injector can fire reliably at a stock ICP level unless there is something wrong with it.

I would have thought the same thing. Its always seemed like a lot.

lincolnlocker · Apr 10, 2015

The Brad said:
I ran a CCT and it passed while in park, but in drive, it failed #6. That's the first time I've see it do that. I'm gonna climb in there tonight and make sure I didn't pinch or roll an O-ring.

what is your voltage while in drive with a lil load on the motor when you did the cct?

live life full throttle

The Brad · Apr 11, 2015

lincolnlocker said:
what is your voltage while in drive with a lil load on the motor when you did the cct?

live life full throttle

I didn't notice while it was in drive, but it was right at 14v when I was paying attention.

I swapped #2 & #6 injectors tonight, so once I drive the air out, I'll check it again.

Tim @ P.I.S. · Apr 11, 2015

Gearhead said:
One would think that an injector can fire reliably at a stock ICP level unless there is something wrong with it.

So with saying that do you keep the same ICP at idle for A code, B code and hybrid injectors? Because I have never seen this the case with some tuners.

Gearhead · Apr 11, 2015

Tim @ P.I.S. said:
So with saying that do you keep the same ICP at idle for A code, B code and hybrid injectors? Because I have never seen this the case with some tuners.

I run 500 on all of them unless I have issues getting them to fire at that ICP.

Tim @ P.I.S. · Apr 11, 2015

I agree that's all they should need. From us specifically our smaller injectors all move oil through the injector just as they did from the factory. And VOP is also to factory spec. So the only thing to consider is the nozzle size.

I have seen from time to time a poppet that doesn't move as smoothly and as quickly as it should. But we find that on the bench and that becomes a core trade in for our customers that request NEW injectors.

mandkole · Apr 11, 2015

It always made sense to me that larger nozzles needed some extra ICP for the IP to stay crisp at idle, but perhaps that's not the case.

Luke@MillerPerformance · Apr 11, 2015

Just for the hell of it, has a new Ford cam sensor been tried?

psduser1 · Apr 11, 2015

mandkole said:
It always made sense to me that larger nozzles needed some extra ICP for the IP to stay crisp at idle, but perhaps that's not the case.

My 100% nozzles on matt s tunes are right at 500-525, nice and smooth.

The Brad · Apr 12, 2015

Luke@MillerPerformance said:
Just for the hell of it, has a new Ford cam sensor been tried?

Yep. Grey, black and dark blue.

TyCorr · Apr 12, 2015

Cps are a crapshoot anymore :shrug: frustratung

DocBar · Apr 13, 2015

TyCorr said:
Cps are a crapshoot anymore :shrug: frustrating

That really pisses me off since mine only seem to go out when it's raining. I've had to swap out some that I just swapped in. In the rain, of course. Why is it so hard to make a reliable CPS?

Tim @ P.I.S. · Apr 13, 2015

DocBar said:
That really pisses me off since mine only seem to go out when it's raining. I've had to swap out some that I just swapped in. In the rain, of course. Why is it so hard to make a reliable CPS?

That's way easy, how many did Ford have to give away and eat labor on for the last few years due to the recall?

Its a $$$$ thing. Order a few million from China for pennies on the dollar of the originals.

SDS97_7.3 · Apr 13, 2015

TyCorr said:
Cps are a crapshoot anymore :shrug: frustratung

DocBar said:
That really pisses me off since mine only seem to go out when it's raining. I've had to swap out some that I just swapped in. In the rain, of course. Why is it so hard to make a reliable CPS?

I had great luck with my IH one. Original went out, then so did the recall one. Got one from International and never had a problem with it

CSIPSD · Apr 14, 2015

I've lost one CPS in almost 2 million miles...

V-Ref · Apr 14, 2015

CSIPSD said:
I've lost one CPS in almost 2 million miles...

Good lordy....how many water pumps in the 2 million miles?

Another vote for the International purple CPS here...

lariat 7.3 · Apr 14, 2015

he doesn't keep a motor long enough for that lol

TyCorr · Apr 14, 2015

CSIPSD said:
I've lost one CPS in almost 2 million miles...

You got me beat im up to about 800k on 7.3s...

DocBar · Apr 16, 2015

Tim @ P.I.S. said:
That's way easy, how many did Ford have to give away and eat labor on for the last few years due to the recall?

Its a $$$$ thing. Order a few million from China for pennies on the dollar of the originals.

Some people should've been fired for that call. That's called penny wise and pound foolish. :morons:

The Brad · May 6, 2015

Here's an update.

I've learned that a cylinder contribution test doesn't work when the AIH is missing, it ends the test prematurely. So the next best thing is to cancel 1 injector at a time while watching MFD. Sure enough, when I canceled #7, there was no change in MFD. I reinstalled my AIH and ran a CCT and #7 failed. I emailed Tim @ PIS and he rushed me out another injector (I'm about 7 months past the warranty, thanks Tim). I moved #5 inj to 7 and put the new inj in cylinder #5 just to be sure there wasn't something else going on. I put about a hundred miles on it and so far, so good. The truck doesn't shake anymore and it's more responsive. I still have a fuel knock on the drivers side that sounds hollow, like someone's hitting the valve cover with a screwdriver handle, but it goes away on deceleration.There's also a loud tick and using a stethoscope, it sounds like the tick is coming from #2. I guess another session with a breakout box is in order.

Once I got some miles on it, I put in a Swamps HFHV IDM and it feels a tad smoother and I notice my inj pw got shorter by about 0.1-0.3ms at idle and cruising. I've only driven 10 miles with it so far.

I haven't towed yet to see how egt's are, but I don't see any difference while daily driving.