Results 1 to 5 of 5
Thread: Fuel pump delays to turn on
08-01-2010, 05:19 PM #1
Fuel pump delays to turn on
I have a 2000 chevy silverado 5.3l and a couple days ago it wouldnt start, I got it figured out that its the fuel pump. truck runs great while running but sometimes i have to turn key on and off like 3 times before i hear fuel pump kick on then i start it and its ready to go. i replaced fuel pump 50k ago. What do you think???2000 Chevy Silverado 1500 Z71 5.3l. Crappy 4l60e..
8in skyjacker tsl 33's
08-02-2010, 02:02 AM #2
I think that it sounds more like something in the fuel pump wiring than the fuel pump itself. It's been a while since I've looked at the fuel pump circuit wiring diagram, but I think I'd probably start at the fuel pump relay and see if, on those occasions when the pump doesn't immediately kick on, the relay is closing or not.'98 K1500 Suburban LS 5.7 L 4L60E NV246 ARB
'92 Ford Explorer XLT 4x4 4.0 L A4LD BW13-54 Trac-loc rear
"My toys were the greasy cogs and springs and pistons that lay around all over the place, and these, I can promise you, were far more fun to play with than most of the plastic rubbish children are given nowadays." Danny in Roald Dahl's Danny The Champion of the World
08-02-2010, 09:05 AM #3
- Join Date
- Feb 2008
- Cloquet, Minnesota, United States
- Blog Entries
08-02-2010, 12:50 PM #4
i changed out relay no luck. When i turn the key offf and on 3 times real quick it works like a charm every time. I was having ignition problems before and had it replaced. when it locked up, Maybe the ignition is causing a problem. again.. Cause on the 3rd turn it always works consistenly.
08-03-2010, 01:31 AM #5
Now that you've changed the relay, we'll assume the relay itself is ok. Have you checked to see if the relay is closing? Is the PCM sending the command to the relay to close? Where you say you've had ignition switch troubles before, and the PCM (which is responsible for commanding the fuel pump relay to close) gets its power through a circuit controlled by the ignition switch, I would be tempted to check to see if the PCM is getting power.
By Mattdtrue in forum General Chevy & GM Tech QuestionsReplies: 6Last Post: 01-03-2010, 11:48 AM
By catfish8187 in forum Performance & FuelReplies: 7Last Post: 08-29-2009, 10:02 AM
By pelican in forum General Chevy & GM Tech QuestionsReplies: 32Last Post: 11-02-2008, 10:44 PM
By Springthing in forum Audio, Video & Gadget TechReplies: 3Last Post: 09-26-2008, 06:10 PM
By TahoeCrowe in forum General Chevy & GM Tech QuestionsReplies: 9Last Post: 09-05-2008, 03:55 PM