1990dtgl98
Seaman
- Joined
- Jul 17, 2011
- Messages
- 57
So im chasing a rough idle and misfire. I bought a boat thst was in decent shape minus it running rough. It had bad gas in it, so I siphoned it out, replaced the feed lines to the filter, filter and anti siphon valve.
Looked over everything and replaced the cap, rotor and coil.
Went to set base timing it it still won't run right. It'll fire off and stumble and die without giving me enough time to set the idle.
Got a cheap fuel pressure gauge and hooked it up. Key on engine off it will shoot to 60psi while the pump primes (you can hear it running). Once the pump primes it settles at 28psi. Bleed off is maybe 1 psi over 5 min.
Sounds like a fuel pump issue? If so it looks like a nightmare to get to. Would it be wise to just do the pump and pressure regulator while I'm down there. Could it be a relay? It primes to 28psi consistently. I'm also not sure if thst initial 60-70psi spike is normal?
Thanks for the help in advance everyone!
Looked over everything and replaced the cap, rotor and coil.
Went to set base timing it it still won't run right. It'll fire off and stumble and die without giving me enough time to set the idle.
Got a cheap fuel pressure gauge and hooked it up. Key on engine off it will shoot to 60psi while the pump primes (you can hear it running). Once the pump primes it settles at 28psi. Bleed off is maybe 1 psi over 5 min.
Sounds like a fuel pump issue? If so it looks like a nightmare to get to. Would it be wise to just do the pump and pressure regulator while I'm down there. Could it be a relay? It primes to 28psi consistently. I'm also not sure if thst initial 60-70psi spike is normal?
Thanks for the help in advance everyone!