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Message: [QUOTE="strokin6L, post: 464844, member: 842"] Here's one email i sent eric... Hey Eric, got a question for ya about ICP voltage and HPOP pressure. When tuned my truck wont see anything higher than like 1550psi and 2.3v. However when the truck is cold it will read alot higher than that within the first couple of miles till the oil warms up then it drops to the values that i just mentioned. Now, when stock tuned....it'll read alot higher like it should. I thought i remember you mentioning that some trucks will experience HPOP PSI being low when tuned...right? And i also thought that you mentioned that the same thing true for ICP voltage..is that correct also? I'm getting the HPOP PSI reading right from the ICP sensor...not the OBDII port. I used Strictly Diesel's ICP pigtail to tap into the sensorhttp://www.strictlydiesel.com/p-2657-high-pressure-oil-gauge-install-pigtail.aspx However i am getting the ICP voltage from the OBDII with my edge insight CS. My trucks seems to run good, but just really want to touch base and see if voltage readings being low through the OBDII port when tuned is normal along with HPOP PSI reading being low when tuned. My ICP sensor is new....Just trying to rule out any HPOP issues Here's Eric's response... That seems about right. Tuned, the ICP function is rescaled and the PCM doesn't read it correctly. You troubleshoot injection pressure issues on the stock tune. I use the Dipricol HPOP gauge and it reads correctly tapped in my pigtail. A few customers have installed the Autometer gauge and it still reads low, not sure which wire they use. Here's another..... will voltage act the same as psi tho? When tuned i'm only getting 2.3v max. Today i turned truck back to stock and i can hit 4.7v easily. Just not sure if reading voltage through the OBDII port is suppose to read low like that when tuned. I've heard that voltage should never change when tuned and that only the PSI reading could read incorrectly. And Eric's response again.... Yeap, works the same way. [/QUOTE]