96 454 MPI missing under load when warm
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96 454 MPI missing under load when warm
Any suggestions/ideas are appreciated. I have a 96 454 MPI SKI engine. It starts off occasionally missing at 3/4 and above throttle and gets signifcantly worse as the engine warms up to the point it won't do anything other than idle. It takes a good 15 minutes after it has warmed up to really start acting up. It starts everytime and idles perfect.
I have take apart the VST assembly and cleaned the filter. The fuel pressure is about 32 psig at idle and about 35 psig as the throttle opens. There is no drop in fuel pressure when the engine misses. The cap/rotor/wires/plugs are all new this season. Any ideas out there. Thanks,
ERIC
I have take apart the VST assembly and cleaned the filter. The fuel pressure is about 32 psig at idle and about 35 psig as the throttle opens. There is no drop in fuel pressure when the engine misses. The cap/rotor/wires/plugs are all new this season. Any ideas out there. Thanks,
ERIC
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mrfixxall
Any suggestions/ideas are appreciated. I have a 96 454 MPI SKI engine. It starts off occasionally missing at 3/4 and above throttle and gets signifcantly worse as the engine warms up to the point it won't do anything other than idle. It takes a good 15 minutes after it has warmed up to really start acting up. It starts everytime and idles perfect.
I have take apart the VST assembly and cleaned the filter. The fuel pressure is about 32 psig at idle and about 35 psig as the throttle opens. There is no drop in fuel pressure when the engine misses. The cap/rotor/wires/plugs are all new this season. Any ideas out there. Thanks,
ERIC
I have take apart the VST assembly and cleaned the filter. The fuel pressure is about 32 psig at idle and about 35 psig as the throttle opens. There is no drop in fuel pressure when the engine misses. The cap/rotor/wires/plugs are all new this season. Any ideas out there. Thanks,
ERIC
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Thanks, the distributor probably needs replacing as there is some corrosion on the inside of it.
The plot thickens however, I started it again and let it idle for about two minutes. The temp. gauge hadn't even moved yet and I tried bringing it on plane and it backfired and stalled. From then on, it would only idle for a few seconds then die. I let it sit for 5 minutes and it then ran fine until it warmed up and started doing what I said above.
What is the best way to get the codes out of this thing. I can borrow an OBD II scanner. Is it different than what the marina has to trouble shoot?
The plot thickens however, I started it again and let it idle for about two minutes. The temp. gauge hadn't even moved yet and I tried bringing it on plane and it backfired and stalled. From then on, it would only idle for a few seconds then die. I let it sit for 5 minutes and it then ran fine until it warmed up and started doing what I said above.
What is the best way to get the codes out of this thing. I can borrow an OBD II scanner. Is it different than what the marina has to trouble shoot?
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mrfixxall
Thanks, the distributor probably needs replacing as there is some corrosion on the inside of it.
The plot thickens however, I started it again and let it idle for about two minutes. The temp. gauge hadn't even moved yet and I tried bringing it on plane and it backfired and stalled. From then on, it would only idle for a few seconds then die. I let it sit for 5 minutes and it then ran fine until it warmed up and started doing what I said above.
What is the best way to get the codes out of this thing. I can borrow an OBD II scanner. Is it different than what the marina has to trouble shoot?
The plot thickens however, I started it again and let it idle for about two minutes. The temp. gauge hadn't even moved yet and I tried bringing it on plane and it backfired and stalled. From then on, it would only idle for a few seconds then die. I let it sit for 5 minutes and it then ran fine until it warmed up and started doing what I said above.
What is the best way to get the codes out of this thing. I can borrow an OBD II scanner. Is it different than what the marina has to trouble shoot?
you need a merc scanner to read the codes..