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Good afternoon, been awhile since i've been on here......
Im still chasing problems with my truck after replacing injectors a year or two ago. At that point I was dealing with weak and worn out injectors causing high IPR% and low ICP. I replaced with unlimited 160/0 injectors and it fixed most the issues I was having. It started new problems with a slight miss on some tunes and a miss or bigger vibration when under a heavy load pulling a trailer. Most of these issues were solved by changing tune manufacture. Lately I have been dealing with lower ICP at wide open throttle 2500-2600 max and ipr % around 50-60%. Is this a sign my HPOP is starting to get weak and not being able to keep up with the bigger injectors? If I hook it up to a heavy trailer (8,000lbs+) I also am starting to get that nasty vibration/miss again. Any advice appreciated just wanting to cover bases before buying an HPOP now since they aren't cheap.
Which of the trucks in your signature is this happening to?
What tune are you using when you have these issues? Do you have a stock power tune for single shot 160/0 you could try, and log some data with FORScan while recreating the issue?
Any codes that might help us diagnose?
How is your fuel pressure, especially under load?
I don't think I'd worry too much about 50-60% IPR, though noting the change from past performance is good. Certainly those singleshots should just be sipping the high pressure oil. That miss/vibration needs attention, and might have a different cause than oil.
Other things you can try. Run with the ICP sensor unplugged and see if the problem goes away. Also you can clean/reseal the IPR valve.
Which of the trucks in your signature is this happening to?
What tune are you using when you have these issues? Do you have a stock power tune for single shot 160/0 you could try, and log some data with FORScan while recreating the issue?
Any codes that might help us diagnose?
How is your fuel pressure, especially under load?
I don't think I'd worry too much about 50-60% IPR, though noting the change from past performance is good. Certainly those singleshots should just be sipping the high pressure oil. That miss/vibration needs attention, and might have a different cause than oil.
Other things you can try. Run with the ICP sensor unplugged and see if the problem goes away. Also you can clean/reseal the IPR valve.
Sorry the truck is a 2000 with a 2002 motor. Signature makes it confusing...I'll have to see if 0 is stock but I think it is when I got the updated tunes. I believe the miss was mostly on the 1023 tune. I also have a tow and daily driver tune from Jelibuilt that give me more power but the injectors are very loud especially when cold.
Fuel pressure tends to stay around 50-65psi. I haven't quite figured it out but sometimes at idle it will be down around 35psi but soon as I give it throttle it goes up to 50s again. Not sure if my FPR is starting to get week or something else on that.
Ill check into the ICP sensor unplugged and see if I can find my old android phone for forscan. I can data log with the CTS3 I have if that works.
If you can log with the CTS3, we can work with that. Would like to see RPM, VSS(vehicle speed), ICP, IPR%, FUELPW, MFDES, VREF (5v), VPWR (12v), EBP_A, MAP, MGP (boost). Not sure what CTS3 will call these PIDs, but we'll take what you got.
I think it would be good, especially with replacement injectors, to have a "stock" power level tune, for these times when something is amiss, but tough to diagnose with the added power requested by the performance tune.
Any codes show up? Does the CTS3 read those?
That fuel pressure dropping at idle is curious - almost like electrical voltage is dropping to the electric pump. What does your batt volts look like at idle when this happens?
I'll have to see if 0 is stock but I think it is when I got the updated tunes.
If it’s a Hydra then 00 will be stock bypass. There is no tune for that position. It bypasses the chip and runs directly off the PCM tuning. Assuming your PCM is stock that would mean it has split shot factory tuning. Your single shots will run on it, but I don’t think it’s going to do the verification you’re after.
Unfortunately like mentioned my 00 is stock (split shot injectors) so I don’t have a way to compare to stock single shot tube. Anyway hoping to do some testing tonight. I did scan the codes and it had logged my misfires at some point. I cleared it to see if they come back( which I assume they will). I have a couple other codes but those are for the fuel heater, intake heater, and wastegate which are all disconnected.
Some good diagnostics so far. Do you have any blowby, as evidenced by puffing at the oil fill cap?
If compression is good, but with #2 and #7 flagged by the misfire DTCs, check PERDEL PIDS and see if they confirm these 2 cylinders. They should be in the list of PIDs along with RPM, ICP, etc.
I'd recommend double checking the electrical side of the injectors with a buzz test. Does the CTS3 do this? If not, FORScan will get it done.
Check the solenoid wiring to these 2 cylinders - heck, check all of them, measuring resistance between the common pin and the solenoid pin. Should be around 3 ohms. Start at the valve cover connection, then 42 pin connector, and finally the IDM connector. Moving the harness while taking the measurement can reveal a damaged wire.
Good to know, John. So thinking out loud here, I'm not sure the value of the wiring checks, but want to eliminate these possible causes of the miss before we blame the new/reman injectors, which is where I'm leaning with the symptoms so far. Some of you have reported struggling to get a good set of 8 injectors the first time from some of these vendors, and have sometimes needed to swap out 1 or 2 before they are all functioning well.
If there is an intermittent short or open in the injector wiring, there typically would be a DTC pointing that out. With no P1316 or related codes, the wiring is probably fine. I'd like to see a data log under load relating ICP, IPR%, RPM and FUELPW, to get an idea of the strength of the HPOP, but I have a feeling it's doing ok. If good compression, a miss on individual cylinders points to the injector, if the electronics are not complaining, and HPO is nominal.
Low fuel pressure would affect all of the injectors, though that 35psi fuel pressure at idle sometimes is curious and needs to be figured out - whatever is going on there might be contributing to this miss.
Testing for voltage drop at the fuel pump would be a good first step on chasing down that stay fuel pressure business. From what I've read it seems plausible.
Well I was hoping to do it sooner but I had to deal with dead batteries for whatever reason...(Ive been fighting a random electrical draw).....On the first run I set off the Check engine light and set the ICP code. I also found out my forscan on my old android phone no longer works and the app is no longer in the app store, so I have no way of running a buzz test or seeing perdels unless someone has another app out there that works. The jelibuilt tunes have always been super loud on this truck especially while towing but have substantial more power than the 1023 tunes. Both are for the 160 injectors. Wish I had a stock tune file for these injectors but I do not currently.
I cant attach the logs on here so heres a google drive with them on it. https://drive.google.com/drive/folde...usp=drive_link
You can get FORScan Lite from the FORScan website or you can still download it from Google Play Store, which is what you referred to as the App Store. As long as you had it in the past.
In order to get it from Google Play Store, even if it is no longer available is to navigate to your installed or archived apps. We use an app that has not been publicly available for Android for a good 7 years because it was archived. Even when we get a new device, it is there you just have to know where to fund it.
EDIT: I just looked at the Google Play Store for the section I mentioned and it is under app management and then "not installed".
You can get FORScan Lite from the FORScan website or you can still download it from Google Play Store, which is what you referred to as the App Store. As long as you had it in the past.
In order to get it from Google Play Store, even if it is no longer available is to navigate to your installed or archived apps. We use an app that has not been publicly available for Android for a good 7 years because it was archived. Even when we get a new device, it is there you just have to know where to fund it.
EDIT: I just looked at the Google Play Store for the section I mentioned and it is under app management and then "not installed".
Ah I didn't realize you could get it off their website for android. Ive had an iphone for so long Ive been out of the android thing for a while. Unfortunately I cant access my old android account due to not having access to my old phone number. Ill figure it out even if I get a new copy of Forescan. Thanks for the help
Ah I didn't realize you could get it off their website for android. Ive had an iphone for so long Ive been out of the android thing for a while. Unfortunately I cant access my old android account due to not having access to my old phone number. Ill figure it out even if I get a new copy of Forescan. Thanks for the help
As Jason pointed out, the Apple App store has it available.
Regarding the old Android device, you don't need a phone number attached to the device. You only need a WiFi connection and use it like you would a tablet. Log into your Google account and that will give you access to Google Play Store or you can download the app directly from FORScan.
Before owning a tablet, I used an old Android phone that didn't have a cellular plan attached to it as a dedicated TP/FORScan device. You may or may not be interested in that sort of thing, but I wanted you to be aware of your options.
