need help with a slow start??

[txmex]

hello
i need to pick every ones brain. I have an 2000 silverado with a 4.8l that is just getting broke in with 230,000 miles on it. the problem i am having it that it has a slow start. i have to hold starter for about 10 sec before it will start. when it dose start it runs very rich for a few mins. i have no check engine on and once running truck runs great and still gets good mpg. at the fuel rail i have about 57 psi of fuel pressure. thanks for all the help!!

[vncj96]

When was your last tune-up, with 230,000 mi on it depending on what has or hasnt been replaced since new some things could just be at their lifes end.

[txmex]

last tune up was about 55000 ago. i pulled the plugs and they dont look that bad. i also put new wires on it when i did the last tune up. everything else on the truck is original other than maintenance stuff. is their in way to test the coils?

[2COR517]

Hook up your fuel pressure gauge and leave it on overnight. Check it in the morning. Truthfully, I don't know how much pressure you should have, but as soon as you put the key to on, it should instantly come up over 50.

That truck is ready for some love. Pull your throttle body and clean it and the Idle Air Control. Clean your MAF. A can of Seafoam in the tank and one through the intake. Air and fuel filters. Wix/Napa Gold are very good. Plugs and wires are probably OK, but if in doubt put in some fresh AC Delco gapped to .040" New wires ACD or Napa Premium. Really ought to change your pre-cat O2 sensors at this point. They can't get lazy after a while, and affect economy and performance without throwing a code. Truthfully, they are a 60K-75K item.

Here's some more reading.

http://www.gmtruckclub.com/forum/sho...ight=induction

The longer you leave the SeaFoam in the intake the better it works. An hour or two is best.

[txmex]

thanks for all the help i fixed it today. im kicking my self for how easy of a fix it was. fuel pressure regulator was bad.