So here's the run down on my truck....
In the last few months I have replaced the ipr, icp, valve cover gaskets, and UVCH's. I had postd about a hesitation/stalling before, the truck ran fine up until yesterday. It would not rev up for about a mile from my driveway and finally cut off when I was pulled in. Tried to immediately restart and wouldn't. It set for a few minutes while I proceeded to curse it and then restarted. No check engine light. This morning I tried a couple hard accelerations and it gave me a 1211 code. My programmer is off so I know its not that. I'm thinking injector orings???
Another bit of info.... Last month when it died on me and I let a buddy look it over, he said every test he ran came back fine except two seperate contribution tests that showed the number 3 cylinder once and the number 6 and 8 another time. That's when I replaced the valve cover gaskets and uvch's (because it was easiest) and it ran fine. I did find one of the uvch's a little loose/unplugged, then. I have noticed a lil blue smoke at first startup lately. That's all leading me to the orings. I'm gonna try to get it on a computer for a test run and check icp and ipr duty cycle asap.
What's you guys thoughts??

 

Your on the right track w/ checking the HPOP pressures first via the ICP and the IPR as well as u claim hard starts once warmed up...how many miles are on your truck? I've got one of my trucks w/ bad o-rings right now w/ around 220k miles but have some others w/ 300K on the original o-rings.
Your 1211 code is basically a too low/high pressure seen by the IPR but it's a vague code as a couple things could cause it or it could just be an old code...injector o-rings will not set a code of their own unfortunately so the (2) tests u plan to run should help rule out the hpop at least.

 

The trucks got 119,000. It never gave a code yesterday when it was acting up. Just got the code this morning on hard acceleration. I did replace the "non-serviceable" plug on the hpop, also, jus throwing that out there.

 

119k is not a lot of miles for orings...do Ur tests

 

Finally got the AE software and did a test run yesterday. I did a 8 sec WOT run in forth gear while watching IPR DC, ICP ICP volts and RPM. I was also pulling a trailer. AT one point I got 64.84 DC with 2286.35 ICP pressure. That was abput the time it threw the CEL with the 1211 code. Time for a new HPOP? Here the full run......
Sorry for the cruddy presentation of the numbers, havent figured out a good way to graph it yet.
Time Injector Control Pressure (PSI) [0.00 - 5076.32] Injector Ctrl Pres DC (%) [0.00 - 100.00] Injector Control Pressure - Volts (V) [0.00 - 5.00] Engine RPM (RPM) [0.0 - 8000.0]
06:24:17.658 647.2
06:24:17.861 473.45 10.55 0.86 642.5
06:24:18.579 484.19 10.16 0.76 642.5
06:24:19.312 480.8 10.55 1.14 661.7
06:24:20.029 680.47 16.41 1.12 726.7
06:24:20.747 955.94 20.7 1.53 1496.7
06:24:21.465 1237.07 22.65 1.45 1713.7
06:24:22.182 868.27 13.28 1.08 1476.2
06:24:22.900 636.35 20.31 1.63 1521.7
06:24:23.617 1519.33 29.3 2.39 1917.9
06:24:24.335 2098.55 36.33 2.81 2361.1
06:24:25.053 2267.11 21.09 1.81 1894.7
06:24:25.770 1077.56 32.42 2.9 1815.7
06:24:26.488 2295.4 37.89 2.91 2098.2
06:24:27.205 2445.29 40.23 3.28 2414.4
06:24:27.923 2478.67 42.58 3.06 2724.9
06:24:28.641 2741.69 22.65 2.18 1914.9
06:24:29.374 1747.28 39.06 3.17 1822.7
06:24:30.091 2417.01 39.06 3.18 1971.4
06:24:30.840 2381.37 42.18 3.19 2084.2
06:24:31.558 2397.78 43.75 2.98 2209.4
06:24:32.275 2406.83 45.31 2.98 2347.9
06:24:32.993 2403.43 46.87 3.22 2463.6
06:24:33.711 2406.83 48.43 3.23 2585.9
06:24:34.428 2423.8 49.61 3.21 2722.9
06:24:35.146 2863.87 29.3 2.5 2146.2
06:24:35.863 2475.84 46.87 3.25 2123.2
06:24:36.581 2400.04 48.04 3.19 2166.2
06:24:37.299 2397.21 49.61 3.22 2253.4
06:24:38.016 2409.09 51.56 2.9 2298.9
06:24:38.734 2402.3 53.12 2.88 2365.6
06:24:39.451 2399.47 54.68 2.92 2419.1
06:24:40.169 2386.46 55.86 2.95 2484.9
06:24:40.887 2405.13 57.42 3.1 2543.9
06:24:41.604 2397.78 58.59 3.17 2607.4
06:24:42.322 2388.16 59.76 2.88 2666.9
06:24:43.039 2388.73 61.32 2.9 2703.4
06:24:43.757 2342.91 62.5 2.87 2769.1
06:24:44.475 2285.21 63.67 2.75 2823.4
06:24:45.192 2286.35 64.84 2.87 2886.4
06:24:45.910 2359.31 64.84 3.25 2947.9
06:24:46.627 2425.49 64.84 3.25 2985.4
06:24:47.345 2476.4 64.84 3.29 2985.4
06:24:48.078 2505.82 51.95 4.25 2275.1
06:24:48.796 3117.28 35.94 3.39 2074.9
06:24:49.513 2531.84 31.25 2.91 2057.9
06:24:50.231 2092.89 27.34 2.49 2031.2
06:24:50.949 1816.29 24.22 2.23 1993.4
06:24:51.666 1609.27 21.87 2.01 1955.9
06:24:52.384 1320.79 21.09 1.79 1919.9
06:24:53.101 1243.86 20.31 1.57 1920.9
06:24:53.819 1176.55 19.53 1.66 1896.7
06:24:54.537 1136.95 21.87 1.64 1871.9
06:24:55.254 1349.07 23.83 1.96 1864.4
06:24:55.972 1394.32 24.61 1.84 1843.4
06:24:56.689 1412.42 24.61 1.96 1839.7
06:24:57.407 1375.09 23.83 1.75 1837.9
06:24:58.125 1343.98 23.44 1.69 1828.9
06:24:58.842 1318.52 22.65 1.93 1819.2
06:24:59.560 1330.4 23.44 1.76 1829.9
06:25:00.277 1332.1 23.44 1.87 1812.2
06:25:00.995 1353.03 23.83 1.68 1803.4
06:25:01.713 1364.34 24.22 1.95 1818.4
06:25:02.430 1399.41 25 1.86 1815.7
06:25:03.148 1523.85 27.34 1.96 1817.4
06:25:03.865 1623.41 27.34 2.1 1819.2
06:25:04.583 1521.02 25.78 2.05 1846.9
06:25:05.301 1517.07 25.78 1.95 1847.9
06:25:06.018 1501.79 25.78 2.13 1868.2
06:25:06.736 1477.47 24.61 1.87 1882.2
06:25:07.453 1420.34 23.83 1.73 1889.9
06:25:08.171 1360.38 23.44 1.74 1888.9
06:25:08.889 1380.18 24.22 2.01 1894.7
06:25:09.606 1402.8 23.83 1.94 1897.4
06:25:10.324 1397.15 24.22 1.99 1888.9
06:25:11.041 1420.91 24.61 1.78 1888.9
06:25:11.775 1418.64 24.61 1.95 1857.2
06:25:12.492 1404.5 24.61 1.97 1857.2
06:25:13.210 1418.64 24.61 1.95 1852.4
06:25:13.927 1416.95 25.39 1.84 1829.9
06:25:14.645 1483.69 26.17 1.89 1833.4
06:25:15.378 1526.12 26.95 2.14 1800.9
06:25:16.096 1577.02 27.73 2.15 1793.9
06:25:16.813 1646.03 28.12 2.23 1796.7
06:25:17.531 1638.68 28.12 2.29 1776.9
06:25:18.249 1633.59 27.73 1.99 1756.2
06:25:18.966 1636.98 28.12 2.15 1747.2
06:25:19.684 1617.18 28.12 2.12 1740.7
06:25:20.401 1628.5 27.73 2.1 1721.4
06:25:21.119 1630.76 27.73 2.07 1710.4
06:25:21.837 1604.74 27.73 2.04 1722.4
06:25:22.554 1600.78 27.34 2.04 1698.9
06:25:23.303 1548.18 26.95 1.94 1707.4
06:25:24.021 1591.73 27.34 2.1 1682.2
06:25:24.738 1580.98 26.95 1.91 1663.4
06:25:25.456 1615.49 28.12 2.2 1676.2
06:25:26.189 1615.49 28.12 2.04 1673.9
06:25:26.922 1631.89 28.51 2.15 1682.9
06:25:27.640 1643.2 28.51 2.3 1666.4
06:25:28.357 1651.12 28.9 2.35 1677.7
06:25:29.075 1733.14 29.69 2.42 1684.4
06:25:29.793 1722.4 29.69 2.3 1712.2
06:25:30.510 1745.02 29.3 2.29 1712.2
06:25:31.243 1722.4 28.9 2.32 1718.4
06:25:31.961 1619.45 26.56 2.16 1735.2
06:25:32.679 1471.81 25 1.99 1747.9
06:25:33.396 1428.82 23.83 1.77 1746.4
06:25:34.114 1250.65 21.09 1.59 1735.9
06:25:34.831 978.57 16.41 1.43 1734.2
06:25:35.549 942.93 17.19 1.4 1757.9
06:25:36.267 1014.21 19.14 1.38 1744.7
06:25:36.984 1020.43 18.75 1.3 1739.9
06:25:37.702 961.03 17.19 1.25 1719.9
06:25:38.419 908.43 15.62 1.42 1708.2
06:25:39.137 975.18 14.84 1.37 1697.4
06:25:39.855 936.15 14.45 1.37 1683.7
06:25:40.603 912.39 14.06 1.29 1685.2
06:25:41.321 884.67 13.67 1.26 1675.4
06:25:42.039 775.5 14.45 1.18 1653.2
06:25:42.756 802.09 15.23 1.14 1665.7
06:25:43.474 825.28 16.01 1.36 1673.2
06:25:44.191 863.74 16.8 1.29 1660.4
06:25:44.909 874.49 16.8 1.21 1654.7
06:25:45.627 876.75 14.84 1.15 1698.2
06:25:46.344 905.04 14.06 1.3 1698.2
06:25:47.077 879.02 13.67 1.25 1572.7
06:25:47.795 689.52 9.77 0.9 1214.2
06:25:48.513 596.19 12.5 1.41 2115.9
06:25:49.230 1191.25 17.97 1.64 2115.9
06:25:49.963 1166.36 17.58 1.45 1547.4
06:25:50.681 668.59 10.16 1.12 1861.7
06:25:51.399 1135.25 17.19 1.65 2213.4
06:25:52.116 1186.73 17.19 1.62 2066.9
06:25:52.834 1164.1 16.8 1.28 1462.4
06:25:53.551 579.79 8.59 0.85 1090.2
06:25:54.269 514.74 8.98 0.96 1598.2
06:25:54.987 802.65 14.84 1.41 1894.7
06:25:55.704 1070.2 17.19 1.58 2037.7
06:25:56.422 1153.35 16.8 1.46 1803.4
06:25:57.139 933.88 16.8 1.2 1585.4
06:25:57.904 933.88 10.16 0.98 1253.9
06:25:58.637 510.21 8.98 0.74 695
06:25:59.355 548.11 14.06 0.84 827
06:26:00.072 470.62 9.37 0.83 827
06:26:00.805 471.75 9.77 0.78 803.7
06:26:01.523 464.96 9.77 0.76 738.5
06:26:02.241 466.09 9.77 0.86 662
06:26:02.958 471.75 10.16 0.72 657.2
06:26:03.676 476.84 10.16 0.79 667
06:26:04.394 475.14 10.16 0.89 642.5
06:26:05.111 483.63 10.55 0.73 643.7
06:26:05.829 478.54 10.16 0.84 665
06:26:06.546 489.85 10.16 0.76 654
06:26:07.264 483.06 10.16 0.75 634.2
06:26:07.982 492.11 10.16 0.87 654
06:26:08.699 472.32 10.16 0.79 641.5
06:26:09.417 475.14 10.55 0.81 642.7
06:26:10.134 485.33 10.55 0.89 648.7
06:26:10.852 487.02 10.55 0.74 652.5
06:26:11.570 477.97 10.16 0.76

 

fuel pressure?

 

^^^^^^^^^^Good answer.^^^^^^^^^^^^

 

I have a gauge under the hood but havent ran it out to check it under load. I'll have to get a longer hose made up one day this week.

 

got the recall CPS done?

 

I have a IH grey cps in my truck. I had the recall done before I knew better. Also wish I had gotten of my @zz and ordered a couple of the original black ones before they got gone.......

 

So I got my gauge out on the cowl so it could be seen and my fuel pressure idling is right at 75psi and when I did my runs, pulling my boat today, it never dropped below 70psi. I got the same results as before with the 64% DC and Injection pressure was just like before at about 22-23k. The gauge is hooked in the port on the fuel bowl. Whats you guys thoughts now?

 

If it is injector orings you will either get oil in your fuel bowl or see it leaking into the valve cover area if you start it with the valve covers off.

 

I'm not losing any on the stick so dont think its going in the fuel bowl. Hadnt pulled the covers. I did run three different contribution tests the other day and only the number 3 and number 8 cylinders came back on them. Same 2 all 3 times. Thats caused by the CPS I have in there from what I've gathered......

 

Did it exhibit any of it's symptoms while you had good fuel pressure?

 

Yea it gave me 1211 code again. It didnt do any of the stumbling or rough idle like it has in the past or cut off.