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Have you checked the throttle position switch? I've seen them stick in the idle position. It's closed @ idle / open in the mid and closed again near wot on a different circuit. As a test you can just unplug it.
AFM can cause similar issues as well as CPS.
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Bucking / No Throttle after 1500 RPM.
So I have been browsing many places online, multiple forums, youtube, and anywhere else I can find information. I just can't seem to get a solution for this issue, and maybe someone here has seen this in their time with these cars.
Description:
After 1500 RPM in any gear, the car starts bucking hard and loses throttle (not power) until I shift out of gear and back in. Anything over 1500 I either buck (feels more like a sudden drop in power but she definitely jerks) or lose throttle completely and it is never predictable. If I shift the vehicle back to neutral and get below 1500 RPM, I can then shift into gear and ride until I get to 1500 or above. She idles a little high (1000 - 1100 rpm) which is a known issue but this has been around since before the car started acting up so I am unsure of its relativity.
[Video of the car in neutral not able to breach that 1500 mark]
List of parts swapped with either new or known working parts:
Air Filter (New)
Air Box
ICV (replaced 07/2016 with used part)
ECU (Known working)
Fuel Filter (New)
Fuel Pump (Less than 2 months used)
Ignition Coil
o2 Sensor
Currently I have no Motronic codes (all cleared with previous work). Next item on the list is to try and replace the Distributor cap and Rotor which I have in my possession. Anyone else have any ideas or knowledge they can bestow upon me before I soon lose all hope of getting this car back on the road?
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