460 rough accelaration?
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460 rough accelaration?
I have a 1996 1-ton E350/7.5L, new Jasper, distributor, o2 sensor, high flow cat, K&N air filter.
When accelerating; light is OK, moderate to hard is a "miss" or not smooth feeling, and cruising is good. Seems like a poor ignition advance or fuel delivery(?).
Runs this way before and after the new Jasper.
Is this a common problem for pre-OBDII?
Could this be the issue?; "Check your coolant temp sensor. If it is not reading the correct temp, your pcm will compensate by running rich, or lean. Had it happen to me, and a $35 part fixed it all. Also probably want to flush radiator if sensor is bad. Good luck."
Thanks in advance for any help.
God Bless.
Jay
When accelerating; light is OK, moderate to hard is a "miss" or not smooth feeling, and cruising is good. Seems like a poor ignition advance or fuel delivery(?).
Runs this way before and after the new Jasper.
Is this a common problem for pre-OBDII?
Could this be the issue?; "Check your coolant temp sensor. If it is not reading the correct temp, your pcm will compensate by running rich, or lean. Had it happen to me, and a $35 part fixed it all. Also probably want to flush radiator if sensor is bad. Good luck."
Thanks in advance for any help.
God Bless.
Jay
Cargo Master
Joined: Dec 2003
Posts: 2,182
Likes: 7
From: Saint Augustine, FL
It doesn't sound like its running too rich. That problem is usually worse at light throttle and cruise.
A '96 should be OBD2. If it hasn't set a code then use a scanner to monitor data. You can check things like coolant temp, O2 voltage, injector pulse, ignition timing, TPS output, map sensor output, most everything.
My first thought is; if it runs normally at light accel and at cruise, but not under heavy acceleration, then its likely a fuel delivery issue. Stopped up fuel filter or a bad pump. Could also be a fuel pressure regulator problem. And since it has a new motor, a fuel line could have gotten pinched or crimped.
Steve
'95 Clubwagon XLT
A '96 should be OBD2. If it hasn't set a code then use a scanner to monitor data. You can check things like coolant temp, O2 voltage, injector pulse, ignition timing, TPS output, map sensor output, most everything.
My first thought is; if it runs normally at light accel and at cruise, but not under heavy acceleration, then its likely a fuel delivery issue. Stopped up fuel filter or a bad pump. Could also be a fuel pressure regulator problem. And since it has a new motor, a fuel line could have gotten pinched or crimped.
Steve
'95 Clubwagon XLT
