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Old 05-27-2006, 06:45 PM   #1
delude
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car bogs out at high rpm

i finally got my motor in good shape and everything.. but now when i get to about WOT during accelleration the car wants to bog down till it reachs lower rpms.. and will happen again if you hit the gas.. just wondering if anyone had any ideas on this.. there are no trouble codes or anything either
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Old 05-27-2006, 07:32 PM   #2
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You should search. My car bogged down also about a month ago. You may need to clean your EGR ports, that could cause it. Make sure you check your spark plugs, make sure they are all the way in. Make sure your distributor cap has no carbon traces. Does it idle rough?
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Old 05-27-2006, 07:46 PM   #3
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Old 05-27-2006, 08:16 PM   #4
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fuel pump/filter?
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Old 05-28-2006, 02:15 PM   #5
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when's the last time you did a full tune up? ie: cap, rotor, plugs, wires, oil change, pcv valve, air filter, fuel filter....

usually bogging at higher rpm is due to lack of fuel. caused by several possible culprits: TPS, fuel filter, fuel pump, fuel pressure regulator sticking part way open, MAP sensor, clogged injector[s] or faulty injector[s]...

theres a slight chance it could be ignition related: coil, cap rotor plugs and wires, resistor box...

anything else other then the things listed should throw a code. so if you have no trouble codes at all, then i would say its one of the above listed
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Old 05-28-2006, 11:56 PM   #6
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dont have an egr valve on the car.. its a jdm motor... tune up came when i put the motor in..all except for the cap and button and distributor.. but there was no problem when i had the other motor in the car... and the fuel filter.. injectors... and regulator have all been swapped out for new parts.. everything else checks out good as far as i know.. is there any easy way to check the fuel pump?
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Old 05-29-2006, 02:12 AM   #7
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read the online manual. it tells how to test the fuel pump, for flow capacity. also, try to find a fuel pressure guage that can be used on our cars, and check the fuel pressure. proper pressure is also listed in the online manual, which is in the FAQ sticky
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Old 05-29-2006, 09:35 AM   #8
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maybe you should take the car to a trained professional?!
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Old 05-29-2006, 09:58 AM   #9
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Are you using a JDM ecu to match your JDM manifolds?
If not, that may well cause the problem.
Manifolds, sensors, and ECU must all match, using the USDM ecu with JDM manifolds doesn't work well.

Check the fuel pressure too, high rpm bogging generally is fuel, as motox said.
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