toofast4uu
New member
Hi,
I have a 1999 Merc 4.3L EFI setup. Boat runs absolutely perfect from 0-3800 rpms. then starts to backfire. I back off the throttle and resumes running fine again.
How do you guy check your fuel pressure on these engines?
Also, has any one just swapped out the fuel pump and used the old cool fuel assembly? I see that they sell the pumps separately, but want to learn about what can go wrong in the fuel cooler assembly, if anything?
I have recently replaced the plugs, distributor, ignition modules, and fuel seperators, and added the booster pumps to fix the vapor lock issues I was encountering earlier this season.
If there's any links to videos etc...please share. I can't seem to find much.
Thanks in advance,
I have a 1999 Merc 4.3L EFI setup. Boat runs absolutely perfect from 0-3800 rpms. then starts to backfire. I back off the throttle and resumes running fine again.
How do you guy check your fuel pressure on these engines?
Also, has any one just swapped out the fuel pump and used the old cool fuel assembly? I see that they sell the pumps separately, but want to learn about what can go wrong in the fuel cooler assembly, if anything?
I have recently replaced the plugs, distributor, ignition modules, and fuel seperators, and added the booster pumps to fix the vapor lock issues I was encountering earlier this season.
If there's any links to videos etc...please share. I can't seem to find much.
Thanks in advance,