1999 5.0gi bogging down at take off.

[Searsnathan81]

boat is currently having issues at take off. It does ok if I slowly take off but if I pin the throttle it will bog right down and not accelerate very well. I’m thinking a tune up but not sure. What do you guys think?

 

[alldodge]

First guess is carb accelerator pump need replacing. Since it needs it rebuild carb while your at it

When you pump the throttle do you get a steady stream of gas squirting in?

 

[Searsnathan81]

It’s fuel injected ??

 

[Scott Danforth]

It’s fuel injected ??

then suggest starting with measuring fuel pressure

 

[alldodge]

then suggest starting with measuring fuel pressure

Woops, agree
Need to know which Gi
Gi-A is 27 to 31 psi
Gi-B and higher is 50 to 60 psi

If fuel pressure is correct then need to check TPS and MAP voltages

 

[Searsnathan81]

Woops, agree
Need to know which Gi
Gi-A is 27 to 31 psi
Gi-B and higher is 50 to 60 psi

If fuel pressure is correct then need to check TPS and MAP voltages

Does the gi have an A and B

 

[alldodge]

Good grief

 

[Searsnathan81]

Woops, agree
Need to know which Gi
Gi-A is 27 to 31 psi
Gi-B and higher is 50 to 60 psi

If fuel pressure is correct then need to check TPS and MAP voltages

I

Good grief
View attachment 349790

Good grief
View attachment 349790

I guess the easier question would have been is it mpi or tbi? But I will check my pressure tomorrow.

 

[Searsnathan81]

It is a GI-A since I have never done it, I ended up doing cap,rotor,plugs and wires with no change. I also checked the fuel pressure and am getting 30psi with no change. I had a friend watch it as I cruised around the pressure remained the same at all speeds and he also watched the injectors and said both sprayed evenly throughout. Out of the hole if I real got on it, it backfired a few times after quite a few Attempt and even stalled once.
Any thoughts?