Quote:
Originally Posted by phunk
If you have a return fuel system on your turbo car, usually fuel pressure will not hold more than a few seconds after the pump is off. Aftermarket regulators are not designed to hold pressure.
To crank from zero pressure rather then a primed system should only add an extra 2 cranks or so until it starts.
If the car starts hot, but doesnt start cold, (assuming plugs are good and nothing strange is going on) it is most likely an issue in the calibration. Getting a perfect tune that starts quickly in every circumstance can be harder than it sounds with many computer systems. In my Z, I used to have a random problem with hot starts that I never fully worked out in UpRev, but it would cold start E85 1000cc injectors dead middle of winter 0 degrees out like it was factory stock on a summer day. My mustang is tuned by one of the best tuners in the industry for that platform and it has intermittent issues with cold starting where sometimes it doesnt even start on the first cycle.
Its worth chasing it a bit, to make sure nothing is actually wrong physically with the fuel system or plugs etc. But if you get it nailed down to the ECU calibration, it may or may not be easily correctable.
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I am sorry to butt in but maybe later this can help other people..
Phunk,
I am running the S1-E kit that is new with the stock hardline being used as return and also E85 and 1150cc injectors. I am having the issue of normal starts being fine especially on E85 but if I drive the car to operating temperature and then shut it off for a short period say to go inside a fast food joint or something ( more than 10 minutes but under 40 ) I am having a very hard time getting it to crank ( no priming, because I never expect this and think of trying to prime), sometimes it takes 8 cranks and once it starts it has low, terribly choppy idle for a minute or two and the first 30 seconds of driving I have terrible lag and no power almost as its trying to die but then it comes out of it and is fine. If it sits an hour or more it will always be fine with no starting issues... any ideas?