Have had my F10 528i going on three weeks with just under 400 miles and I am very pleased with it except for one thing. It acts like the fuel filter is clogged but this model has no fuel filter. My problem is a severe stumble on fast acceleration that does not resolve no matter how much adjustment I make to Accel Pump, or Fast Accel inputs. It jerks the bike like I really cracked the throttle. I did a couple days on track with Reg Pridmore, and rode the girl hard … ). The hesitation feels like it goes into a limp mode for a brief second, then starts building boost. Grabbing a new vacu gauge from HF (to retest) and a can of brake cleaner. Hesitation at full throttle (not necessarily high RPM) can be due to excessive plug gap (worn plugs - plugs open gap as they age due to metal transfer) or a small gap inside the plug wire. The vehicle may even stumble entirely during these seconds. Has a jd jetting kit and full aftermarket exhaust. However, there is a long list of other reasons which could be the cause of this hesitation problem too. R1200GSA, hesitation with hard acceleration 05-25-2019, 03:53 PM. Dangerous if … My '06 Street Glide idles fine, but when I roll on the throtte, the engine hesitates at low rpm. it has not yet died when doing this. Acceleration on a motorcycle relies heavily on the carburetor. Cranks and idles fine. Validate that your intake manifold (rubber) is soft and pliable. I have tuned and tuned on the carb so I don't think its totally due to the carb. When your engine hesitates during acceleration, it may seem to have lost its power for a few seconds. I am thinking that it may be related to a clogged fuel filter or TPS. Things were looking up: I replaced the spark plug, cleaned out the exhaust, adjusted the idle / fuel screws, and even replaced the brakes (I can stop now! If you found this page you more than likely are having issues with "hesitation and bogging" during throttle application in a Miata. All maintenance up to date. New plugs, wires + accel. I went on a ride a little over a month ago in the mountains and it was a much higher altitude than im used to. It hesitates on initial acceleration. The only thing I can think of is the plugs. This is somewhat of a common problem for this generation of Miata. This really only happens when I'm spin slow speed drills where the throttle is all the way closed then gets cracked open. At one point the check engine light came on. So I'm sure this subject has been covered in some way shape or form I have a GT 3.3K on it and sometimes not all the time it stumbles on a hard acceleration I'm sure its a misfire I have not got a CEL nor is the car chipped YET my question is has anyone found a permanent fix to this yet?? I am experiencing a hesitation upon hard acceleration from 3rd or fourth gear. Not sure what jets the mechanic put in. If your Buell Motorcycle is experiencing problems and you could use some friendly advice to help diagnose/troubleshoot the issue, please first review the extensive listings of issues already documented below; if none match your particular Buell troubleshooting issue, then please initiate a new thread here and post a thorough description of your particular Buell Motorcycle problem. When a engine is hesitating it will cause the car to lunge or surge which will cause a sudden jerk as the car slows down. Backfiring caused by internal carburetor problems is a result of a defective accelerator pump. 1 Posts . The power comes back and then off again cycling every second or so during low rpm. Hesitation Definition - An engine hesitation is an interruption of continuous power during acceleration. I own a 2012 Chevrolet Cruze LTZ with auto transmission and approximately 113,000 miles on it. Photo courtesy of Bill McChesney on Wikimedia. I have Vance and Hines and k&n filter. If it's hard and cracked you could have an air leak at the manifold. At the beginning, the hesitation occurred in 95% of the hard accelerations. Hey everyone, my name is Chris Breaux from Bush, Louisiana. The car starts, idles and runs ok under gentle acceleration. This hesitation could be potentially dangerous in situations like entering and exiting the highway from an off-ramp, where acceleration may be necessary to merge with traffic. You find an air screw there. I have a 1980 honda CM200t twin star that I recently bought. Why is the engine bogging under acceleration? I changed them to the NGK platinum a while … Current settings are Accel Pump 170 = 25.0 and Fast Accel 170 = 50.0 I have definitely noticed a throttle hesitation on my 2015 srt 392 (46kmi). Bike is an 05 crf250r. 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However, there is a long list of other reasons which could be the cause of this problem...