I used the OTC 7448 canister and a can of their fluid. I monitored injector pulse width with my Tech2, it displays bank average pulse width. At WOT/2000 rpm : before cleaning 17.25 to 17.56 ms pulse width, after cleaning 16.88 to 17.25ms. No difference at idle, pulse width stayed at 3.4 to 3.6 ms.
I know, not much of an improvement, but a pleasant surprise to me none the less since I wasn't expecting any. I avoid cheap gas and for the past few years I have used Costco gas exclusively (talk about a high volume station, even during their slowest times there are multiple cars filling up at any given moment). I think they advertise that they use five times the required minimum amount of detergents.
Perhaps some one can explain why my truck was difficult to start after I disconnected the canister. It took a few 20 second cranks, with no signs of life from the engine before it eventually fired. I tried WOT/clear flood mode and it did not help. I had used 60 lbs air pressure on the canister and turned the shutoff valve on the canister immediately when the engine stalled after it had used up all the cleaning fluid. The fuel system is returnless. I reinstalled the fuel pump relay and cycled the ignition a few times to run the fuel pump and prime the system.
I know, not much of an improvement, but a pleasant surprise to me none the less since I wasn't expecting any. I avoid cheap gas and for the past few years I have used Costco gas exclusively (talk about a high volume station, even during their slowest times there are multiple cars filling up at any given moment). I think they advertise that they use five times the required minimum amount of detergents.
Perhaps some one can explain why my truck was difficult to start after I disconnected the canister. It took a few 20 second cranks, with no signs of life from the engine before it eventually fired. I tried WOT/clear flood mode and it did not help. I had used 60 lbs air pressure on the canister and turned the shutoff valve on the canister immediately when the engine stalled after it had used up all the cleaning fluid. The fuel system is returnless. I reinstalled the fuel pump relay and cycled the ignition a few times to run the fuel pump and prime the system.