99 Volvo 5.0GL

[Bhuie]

Boat was running fine at the start of the season. I noticed a little dripping in the lower front of the engine suggesting a water pump needing to be replaced. Got the parts and replaced water pump. Getting to the three hex bolts I did turn the motor over several times to get to the hex bolts. I did this with both belts off and I’m now wondering if I affected the timing because now it is running rough. Runs fine at start up full throttle but then starts to bog and sputter out. Pull throttle back to 3-3500 rpm’s and you can feel the power go in and out. Almost like it’s not getting enough gas. Still runs but several times that same process repeats itself. Hatch was opened and it rained while working on it and wondered if water made its way in the carb. Wondering if Seafoam would cure it? So several possibilities going on here. Anyone here experience the same type thing going on?
Thanks,
Brad

 

[alldodge]

Replacing the water pump will have no effect on the motor running unless something else was knocked loose or disconnected.

It could have an issue with water. If it was just a little bit of water the motor would burn that off in a short time. If it was more than that there could be an issue.

 

[Bhuie]

Boat was running fine at the start of the season. I noticed a little dripping in the lower front of the engine suggesting a water pump needing to be replaced. Got the parts and replaced water pump. Getting to the three hex bolts I did turn the motor over several times to get to the hex bolts. I did this with both belts off and I’m now wondering if I affected the timing because now it is running rough. Runs fine at start up full throttle but then starts to bog and sputter out. Pull throttle back to 3-3500 rpm’s and you can feel the power go in and out. Almost like it’s not getting enough gas. Still runs but several times that same process repeats itself. Hatch was opened and it rained while working on it and wondered if water made its way in the carb. Wondering if Seafoam would cure it? So several possibilities going on here. Anyone here experience the same type thing going on?
Thanks,
Brad

 

[Bhuie]

Replacing the water pump will have no effect on the motor running unless something else was knocked loose or disconnected.

It could have an issue with water. If it was just a little bit of water the motor would burn that off in a short time. If it was more than that there could be an issue.

Thanks for confirming that.

 

[ScottinAZ]

yep, nothing with either of the water pumps that would affect timing. You may have some water in the fuel, or you may have knocked something loose that is causing the issue. Start with an inspection of the area where you were working, and move on from there.

 

[Bhuie]

Any thoughts on what I could have knocked loose?

 

[alldodge]

Any thoughts on what I could have knocked loose?

Might be coincidence that it happened after the water pump. Also assuming it didn't rain much

It bogs at WOT and then starts having problems. I'm thinking fuel supply issue. Things to check:
Dump fuel filter contents into clear container, see if there is only clear gas
Fuel pump pressure, 3-8 psi
Next is carb cleaning

 

[Bhuie]

Any thoughts on what I could have knocked loose

Might be coincidence that it happened after the water pump. Also assuming it didn't rain much

It bogs at WOT and then starts having problems. I'm thinking fuel supply issue. Things to check:
Dump fuel filter contents into clear container, see if there is only clear gas
Fuel pump pressure, 3-8 psi
Next is carb cleaning

ok will do and follow up

 

[ScottinAZ]

Any thoughts on what I could have knocked loose?

Check any and all connectors in the area. The distributor is right in that area so is a prime suspect.

 

[jimmbo]

Check any and all connectors in the area. The distributor is right in that area so is a prime suspect.

Not on a Chevy 5 Liter

 

[ScottinAZ]

Not on a Chevy 5 Liter

It’s a 99 Volvo, were they using Chevy motors that year or still Ford? They would have inherited Ford engines with the Cobra/SX drive around 1995-1996


ok, looks like the 5.0 Ford engine was all done by 1997... my bad, yeah, there is nothing in the area on a SBC that would cause issues, unless there is a wire loom for the alternator or some such.....

If I start having issues with a mechanical item after servicing that wasnt there before, I usually start where I was working.... usually I find something didnt like being disturbed.