454 slow start help

[Captanmactavish]

I have a 98 with the 7.4l and it takes a while for it to fire up. I realize it's a big motor but what can I do to improve starting? After about 5 seconds of cranking it over it fires up good. ALSO I filled my tank yesterday, got home and let it idle while I ran inside to get my dog. After idling for about 5 minutes it would make a popping notice, I look under and every pop shot some flames out of the gasket the connects my headers to my down pipe! Only does his while idling. I tried to show my fiend and get his opinion but she stopped doing it! Weird!

Thanks for reading guys

 

[dirtyhick42]

the slow start is probably your injectors. they have a problem with leaking down and causing slow starts on the vortec 454s

 

[LoudnLifted88]

how many miles injectors are a known problem mine are really bad

 

[SkyHighColorado]

I replaced my starter and it fires up faster now. You can get a stronger starter for that giant engine!

 

[twomanymontes]

It does sound like fuel pressure bleeding down somewhere. Try turning the key to on for a few seconds, but don't start it, turn the ignition off, wait a sec and then try to start it. The double shot of fuel might help diagnose the problem

 

[Captanmactavish]

I just turned 156k. I'll try that once I get home from classes. Thanks everyone.

 

[great white]

Another vote for probable injectors leaking down after shut off causing hard starts.

The backfiring at idle....not sure on that one.....possibly injector related.

 

[DRAGGIN95]

I just did the injector's and FPR in my 00 CC dually with a 454, what a difference it made, I went with the Lucas injectors from 5.0 motorsports.

 

[Captanmactavish]

So I tried turning my key on and off a few times and then started it. What a difference! So that means injectors right?