Hello to all! I have a 1996 Shabah z210 with the 5.7l EFI and bravo one. Motor has 97hrs.
I'm going to jump right into this:
While on the water and a load on the motor it will bogg out at about 3k rpms. It will free rev with no problems in neutral.
The motor starts like and champ and idles with no problems, everything sounds great!
So far this is what I have completed:
Drained tank, refilled with 93 and sea foam, removed the pickup from tank and cleaned small screen in side the tube, removed the ball bearing and spring from fitting, replaced fuel hose,water fuel filter and all spark plugs. Removed the fuel pump/vapor separator and cleaned small cylinder filter on bottom of pump.
Put her in the water today and ran great for the first throttle up then Bam! Back to bogging at at 3k, never stalls just cuts out big time.
What I did next was very stupid I know but it gave me a good bit of information to narrow down the list. While on the lake I removed the spark arrester, fired up the engine with hatch open and could see a good flow of fuel from both injectors into the ports. I had a friend give it throttle to induce the bogging; when it did occur the fuel from the injectors would almost come to a complete stop, then trigger back on.
So now we know its a fuel delivery issue, or I would think? Here are my questions.. What controls the injectors to keep a continuing flow of fuel? The motor looks to have a throttle position sensor, maybe this? I'm kinda leaning away from the fuel pump just because of the consistent cone shaped flow. I could be totally wrong.
Is there a module in the distributor that supplies a signal to the fuel system?
Something is telling my injectors or pump to cut out when at a certain throttle position.
From the research I have done most people speak of ignition system problems. Could that control my symptoms?
Any ideas guys?
Thanks in advance,
John
I'm going to jump right into this:
While on the water and a load on the motor it will bogg out at about 3k rpms. It will free rev with no problems in neutral.
The motor starts like and champ and idles with no problems, everything sounds great!
So far this is what I have completed:
Drained tank, refilled with 93 and sea foam, removed the pickup from tank and cleaned small screen in side the tube, removed the ball bearing and spring from fitting, replaced fuel hose,water fuel filter and all spark plugs. Removed the fuel pump/vapor separator and cleaned small cylinder filter on bottom of pump.
Put her in the water today and ran great for the first throttle up then Bam! Back to bogging at at 3k, never stalls just cuts out big time.
What I did next was very stupid I know but it gave me a good bit of information to narrow down the list. While on the lake I removed the spark arrester, fired up the engine with hatch open and could see a good flow of fuel from both injectors into the ports. I had a friend give it throttle to induce the bogging; when it did occur the fuel from the injectors would almost come to a complete stop, then trigger back on.
So now we know its a fuel delivery issue, or I would think? Here are my questions.. What controls the injectors to keep a continuing flow of fuel? The motor looks to have a throttle position sensor, maybe this? I'm kinda leaning away from the fuel pump just because of the consistent cone shaped flow. I could be totally wrong.
Is there a module in the distributor that supplies a signal to the fuel system?
Something is telling my injectors or pump to cut out when at a certain throttle position.
From the research I have done most people speak of ignition system problems. Could that control my symptoms?
Any ideas guys?
Thanks in advance,
John
