stangmanfifty

well my 5.0 has been doing this weird thing every time during a cold start. First i turn the key car turns on, hesitates, then bogs down, and turns off. I turn it back on for the 2nd attempt then there she goes.., starts right up and stays idling good. What can be the problem?

zebo87

is there any kind of hesitation or lack of power or anything like that or does it run good and strong after that.

mjr46

yuo need to perform a fuel pressure test and check for leak down, once you have confirmed such we can go from there

89gtwith3.55s

also check to see if you are running lean mine was doing that too id have to rev it a bit b4 it would idle also if i had to the second start would be good

stangmanfifty

well after the second attempt it turns on and idles fine! i did mess with the tps once on another 5.0 and it started doing the same? i checked my tps and volts are where they should be. car runs nice and strong but i dont like that hesitation on the cold start.