Quote:
Originally Posted by Megahurtz
I'm dealing with a CTSv now that has extremely low pressure on hot starts with the Katech dual in tanks pumps. The tune is commanding 60 psi but its getting 2-5 psi and then after a few seconds it ramps up to normal and the car runs fine. I didn't install the pumps and the tune is good but I wonder if there is some sort of setting necessary or if the customer maybe has a similar issue due to installation error.
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I wouldn't know Jason, but I can tell you in my experience, getting these pumps in the tank are like jambing 10-lbs of sh1t into a whatever. It is tough. And it's tougher to get anything aligned and as many times as I've had that thing in-and-out (this is the 3rd time I dropped the tank, and I be I've got that thing in the tank-and-out 5-times that). The tank as some sharp edges that can really scuff and abrade the corrugated lines. I'm replacing all of the jet/venturi/transfer lines and am considering replacing the pump, just because it could have been running for a few minutes without fuel, since it is apparent that side of the tank was run completely dry. I don't want to replace the pump, but I don't want to drop the tank again, even though I'm an expert now.
Katech stated (as I'm sure you've seen) these bucket can be run with the OEM tune. I've been, pretty much running that way, slowly transitioning from the way I had it for the DSX aux' controller. Even though it will run about 10-psi higher than commanded, it doesn't seem too big a deal. I'm still playing with the REFLEX controller and bringing the secondary pump in the bucket in, but it seem like everything is falling in line.
I wouldn't pretend to offer much advice to you for the tune. What I know is there's a lot of sh1t to move around to get than thing in the tank. And if you don't do this kind of work all the time, it's a bit tricky, and if you aren't careful, it isn't hard to damage some of these softer lines. Maybe see if the problems exist under certain conditions. For me, doing a lot of regular driving, and not turning hard, didn't slosh the fuel between the tanks much. So - that allowed the primary side to drain, completely, because it seems the aux' side wasn't transferring the fuel correctly, due to the jet pump not working right. I'm still waiting for parts to put it all back together, so I haven't finished this fiasco, but that's what it looks like. Again - adding fuel immediately corrected the problem, and I heard the primary pump kick on everytime I pressed the START button so it was pumping. Maybe, if they drive really easy for a while, and avoid sloshing the fuel around, if they end up starving the primary side out of fuel, they probably have a similar issue to mine.
I'd still do this bucket again - no regrets, and the compromise for better fueling for battling the installation is still worth it. I'm just saying it's tough.