502 EFI shutting down after 5 seconds of run time
#21
Charter Member #1171
Charter Member
What if you bring the RPM up right away,,,, will it still cut out?
__________________
I want to live in a world where a chicken can cross the road and not have its motives questioned.
I want to live in a world where a chicken can cross the road and not have its motives questioned.
#22
Platinum Member
Platinum Member
Thread Starter
Was messing with it this morning and it fired up and ran for about 20 secs then shut off. Checked fuel pressure and spark and all was good. Now it won't fire off at all unless you sit on the switch and let it turn over 50 times..... and then it will fire off and shut right down. It will rev up but then shut down.
#23
Registered
iTrader: (1)
Plus probably soaked with fuel now after so many cold starts. Hopefully water didn't revert in from all the starts + dying.
Pull the plugs anyway and check.
Pull the plugs anyway and check.
#24
Registered
iTrader: (1)
Was messing with it this morning and it fired up and ran for about 20 secs then shut off. Checked fuel pressure and spark and all was good. Now it won't fire off at all unless you sit on the switch and let it turn over 50 times..... and then it will fire off and shut right down. It will rev up but then shut down.
#25
Platinum Member
Platinum Member
Thread Starter
I've tried just about eeverything. It's getting fuel and fire so i don'tuunderstand why it won't stay running. It has to be a sensor.
#27
Registered
Join Date: Dec 2001
Location: Rapid City SD
Posts: 809
Likes: 0
Received 0 Likes
on
0 Posts
Hold on, I just looked at your first post and 30 psi is to low for fuel pressure with the key on. You need to look closer at your year / model and see what it's supposed to be. More details!
#29
artselectricinc.com
Platinum Member
Just found a problem on my boat causing a similar issue. It would act up occasionally-motor would shut off for a split second, then come back on, finally acted up enough to diagnose. After trying many different avenues, I cut the tach wire at the coil. Problem disappeared! I need a new tach, or replace the wire. I'll probably do both. I know it's not a common cause of problems, but it might be worth a try on your boat.
Steve
Steve
#30
Platinum Member
Platinum Member
Thread Starter
It's a 1996 502 efi. I got it to fire off yesterday and it quit in 5 seconds.... I got it to fire off again and it ran like normal. Turned it off and tried to fire it back up and I'm back to the same thing..... a 5 sec. shut down. Tried to crank it again and it never fired off..... just turned over and over..... very, very irritating