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View Full Version : Problem @ 7500 RPM Fabulous 09-09-2008, 05:57 AM Need Help! My car suddenly jerk (kind of suddenly loss of fuel or air) at every 7500 rpm. Only @ 7500rpm. it jerks and than suddenly continue to rev up...... DOMINION 09-09-2008, 06:03 AM Could be a bad fuel pump. Search it up. From what I have read its a e-z fix :) I would check my plugs. They could be bad not getting a good charge at the high RPM's. Fabulous 09-09-2008, 09:00 AM Will check it. But just thinking it is wierd because it only happen @7500rpm. Could it be the injector which start @ 7500rpm Could be a bad fuel pump. Search it up. From what I have read its a e-z fix :) I would check my plugs. They could be bad not getting a good charge at the high RPM's. nycgps 09-09-2008, 09:10 AM check your Aux port. Fabulous 09-09-2008, 12:03 PM Don't think it is an oil issue. I'm using Greddy (5W40) since day 1. check your Aux port. alz0rz 09-09-2008, 12:10 PM how many miles on the car Fabulous 09-09-2008, 12:29 PM 6 speed MT JDM. now about 45k miles. how many miles on the car Razz1 09-09-2008, 08:38 PM Are you sure you are not hitting the rev limiter? Fabulous 09-09-2008, 10:23 PM RPM redline @ 9000. have been remapped by RE Amemiya. no problem for years until lately.... Are you sure you are not hitting the rev limiter? kersh4w 09-09-2008, 11:25 PM pull the room fuse? Fabulous 09-10-2008, 09:13 AM sorry, but what is the room fuse? pull the room fuse? StealthTL 09-10-2008, 09:29 AM Footwell fusebox, marked 'room' controls constant power to the ECU. .....but it sounds like a sticky actuator on the inlet manifold, to me. S Spinning Sushi 09-10-2008, 09:33 AM Do this: http://www.rx8club.com/showthread.php?t=142852 That should fix your problem. elysium19 09-10-2008, 10:33 AM .....but it sounds like a sticky actuator on the inlet manifold, to me. S Same thought here.... Although I thought those come on earlier (6800), but it's possible you're not feeling it till a half-second later or something. You can take that apart pretty easily and make sure the valves are opening smoothly. Fabulous 09-10-2008, 10:58 AM Done the above with the Liquid molly and compression check o.k. Didn't help to resolve the 7500rpm jerk!!:banghead: Fabulous 11-11-2008, 12:19 PM Dear ALL, I'm still having the problem. When I rev my rpm, it still hesitated @7500rpm (as though insufficient fuel for a 2 seconds) and then continue to climbing to 8500rpm and feeling lost of power. It doesn't seem to be a mechanical problem. Do you think my ECU is the problem? Anyone has experience this problem on 6MT JDM spec. Need help urgently. Thanks |