SoCal Jet Boats
Tech Talk => Engine Mechanical / Electrical => Topic started by: Relaxin Jackson on September 20, 2014, 12:59:48 PM
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Ok people this is my first post so hang in there. I had a 455 olds motor rebuilt, the old motor ran ok with the edelbrock 750 marine carb and stock coil/dist but on the new motor it runs good at mid and low rpm but nothing when i mash down on the gas, i cant even mash down right out of the hole, i have to slowly ease in into the throttle.
ANY SUGESTIONS :screwy:
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While the motor was rebuilt , where was the carb??? Was it rebuilt also???
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Ok people this is my first post so hang in there. I had a 455 olds motor rebuilt, the old motor ran ok with the edelbrock 750 marine carb and stock coil/dist but on the new motor it runs good at mid and low rpm but nothing when i mash down on the gas, i cant even mash down right out of the hole, i have to slowly ease in into the throttle.
ANY SUGESTIONS :screwy:
Check to see if your accelerator pump is working and verify you are actually getting wide open throttle( with the engine off)
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... the new motor it runs good at mid and low rpm but nothing when i mash down on the gas, i cant even mash down right out of the hole, i have to slowly ease in into the throttle.
Going to need a little more information even to make a good guess.
What is it doing when you get near full throttle? Does it just stop pulling rpm, does it backfire or sputter?
What does it do when you try a hard acceleration from stop?
At what rpm does it start to act up?
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Over the years have had a number of OLDS and on one of them I had a similar issue. Turned out to be voltage - too weak - new battery and cleaned up the ground on the block - got my spark back to 100%