03 evo sputtering higher rpms
Jun 5, 2008, 04:07 AM
#33
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I had this problem too. I fixed it by going to colder plugs and gaping them to only .22. In addition I put dielectric grease on all of my connections as well as the ends of the plug wires.
Also, check the connector to the cam sensor. The wires are thin and can easily be damaged because of their location.
One thing that really cured my mileage problem was the throttle body butterfly valve seals. They leaked at only 7 psi.
I have the FP Green, PTE 780s and a Walbro. I am boosting 25psi on 93 pump. No problems what so ever now.
Also, check the connector to the cam sensor. The wires are thin and can easily be damaged because of their location.
One thing that really cured my mileage problem was the throttle body butterfly valve seals. They leaked at only 7 psi.
I have the FP Green, PTE 780s and a Walbro. I am boosting 25psi on 93 pump. No problems what so ever now.
Last edited by Appauldd; Jun 5, 2008 at 06:55 AM. Reason: error
Jun 5, 2008, 05:37 PM
#36
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well i changed the fuel pump/fuel regulator/and mass sensor car still sputter above 5k. the injector pulse reading at 5000 rpm was at 17.8 . but anyway the car deff drives better with a new maf that has been cleaned out. but im still getting the sputtering. car drives fine up until 5k. can it be my hks dlii??????
Jun 5, 2008, 10:24 PM
#37
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You said 60k? Did you do your timing belt? Take off your timing belt cover and check the tension of the belt. I've seen loose timing belts cause the same kind of sputtering you're talking about.
Jun 6, 2008, 02:44 PM
#43
So im thinking there may be a leak somewhere. Im still gona have a fuel pressure test done when i take the car.. I just havent had a chance to do it bc i was moving and busy with work.. Let me know if u find ur problem
Jun 6, 2008, 03:23 PM
#44
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mpl im getting as boost test done this monday,also i will get ngk 8 heat range plugs this week end
Last edited by afmafia; Jun 6, 2008 at 03:24 PM. Reason: wrong