Revrider313
Recruit
- Joined
- Oct 3, 2017
- Messages
- 1
Good day.
I have a 99 zx22 donzi with a 454 of throttle body injected motor in it. I wanted to get more out of it so I got a set of big rec port heads, 502 mpi harness/ecu, cam, roller rockers, and all of the other fixins. With diacom hooked up, it shows no knock sensor ever active. The boat is quite doggy coming out of the water and then all of a sudden it just takes right off. But then immediately falls on its face. When you bring the throttle back to idle and start again...it will get up on plane and do it all over again. I was then watching the scan tool closely while driving and it seems like when the boat take off that when it really starts to get timing. And when it falls on its face that's is when it has all the timing taken away. Makes sense...losing 16* timing will do that. I also learned this is basically limp mode.
Yes timing is good and done in bad timing mode. I have had the thing from one side of the spectrum to the other. Fuel pressure is 43.5psi coolfuel.
When I key on I get 2 simultaneous codes. Tps voltage high and coolant temp sensor. They can be cleared while driving but just come back with restart. Both sensors are working on the scanner though!
Please help!
Thanks
I have a 99 zx22 donzi with a 454 of throttle body injected motor in it. I wanted to get more out of it so I got a set of big rec port heads, 502 mpi harness/ecu, cam, roller rockers, and all of the other fixins. With diacom hooked up, it shows no knock sensor ever active. The boat is quite doggy coming out of the water and then all of a sudden it just takes right off. But then immediately falls on its face. When you bring the throttle back to idle and start again...it will get up on plane and do it all over again. I was then watching the scan tool closely while driving and it seems like when the boat take off that when it really starts to get timing. And when it falls on its face that's is when it has all the timing taken away. Makes sense...losing 16* timing will do that. I also learned this is basically limp mode.
Yes timing is good and done in bad timing mode. I have had the thing from one side of the spectrum to the other. Fuel pressure is 43.5psi coolfuel.
When I key on I get 2 simultaneous codes. Tps voltage high and coolant temp sensor. They can be cleared while driving but just come back with restart. Both sensors are working on the scanner though!
Please help!
Thanks