Runs Awesome! But won't start first try

sethhatfield · #1 07-27-2013, 10:40 AM

You know...that's very helpful! I think a weak battery can cause all kinds of problems. Seems like my problem went away for quite awhile after I changed the battery over a year ago. A little extra voltage makes all the relays perform more consistently. It is hot as hell here in Houston 99 degrees this time of year and that drags on the battery.

I threw a fuel pump at it because it made sense and it was only $78. Obviously I didn't buy the whole assembly for $364. An extra 15 minutes of simple modification is all it takes to install a universal higher flow unit.

I'll check the vacuum line to the fuel pressure regulator but that actually reduces fuel pressure at idle so I don't think it would cause this particular issue. I already replaced the fuel filter/regulator just because it was cheap and had never been changed.

upallnight · #2 07-27-2013, 12:27 PM

Quote:

Originally Posted by sethhatfield

You know...that's very helpful! I think a weak battery can cause all kinds of problems. Seems like my problem went away for quite awhile after I changed the battery over a year ago. A little extra voltage makes all the relays perform more consistently. It is hot as hell here in Houston 99 degrees this time of year and that drags on the battery.

I threw a fuel pump at it because it made sense and it was only $78. Obviously I didn't buy the whole assembly for $364. An extra 15 minutes of simple modification is all it takes to install a universal higher flow unit.

I'll check the vacuum line to the fuel pressure regulator but that actually reduces fuel pressure at idle so I don't think it would cause this particular issue. I already replaced the fuel filter/regulator just because it was cheap and had never been changed.

If the line hold vacuum it will reduce the pressure at idle, but if you have a leak it will be like WOT so it will increase the pressure in the fuel rail.

Dudewanarace · #3 07-28-2013, 12:19 PM

This may sound odd, but when I had a cam position sensor failing, I would get the start problem you describe. I couldn't reproduce it each time, it was random. Not long after the problem started, I got a code for one of the cam position sensors. Thinking it was just a different problem, I replaced the cam position sensor. Well, it has never failed to start first try again. That was years ago..