Engine swaps can breathe new life into your vehicle, but they often come with unforeseen challenges. Recently, a user encountered issues after swapping engines, experiencing erratic idling, misfires across all cylinders, and a lack of O2 sensor detection, accompanied by numerous throttle body related error codes. This mirrors problems seen by others attempting similar modifications, specifically when considering throttle body compatibility. This article delves into a DIY investigation comparing the Vr6 Obd2 Throttle Body with the ABA OBD2 throttle body, aiming to shed light on potential compatibility for engine swaps.
The user’s project involved installing a VR6 OBD2 throttle body on a 16v/ABA/ABF engine, controlled by a stock ABA OBD2 computer, with the throttle body already adapted. The physical installation was straightforward, as the VR6 throttle body bolted directly onto the engine. The initial issue arose because while the smaller ABA throttle body resulted in a stable idle and no misfires, it noticeably reduced engine performance. This prompted the user to explore the VR6 throttle body for potential performance gains, despite the initial problems encountered.
To understand the root cause of the issues, a detailed comparison between the VR6 and ABA throttle bodies was undertaken. Externally, the throttle bodies appear remarkably similar in their diagrams and internal structures. In a quest for knowledge, a damaged VR6 throttle body was dissected alongside an ABA throttle body. This hands-on examination revealed surprising similarities. Beyond a different serial number, the components seemed almost identical. Intriguingly, even the Throttle Position Sensor (TPS) boards shared the same part number, raising questions about the actual differences between these units.
Further investigation into the internal wiring and connections revealed consistent plug configurations and wire colors leading to the motor and TPS board. This detailed examination aimed to determine if internal components could be swapped between the ABA and VR6 units. However, the throttle bodies are micro-welded, making component swapping impractical without causing damage.
Despite the apparent physical and internal similarities, the crucial question remains: Can a VR6 OBD2 throttle body be successfully and reliably used with an OBD2 ABA engine? While rumors of successful swaps exist, definitive part numbers and concrete evidence are needed.
Conclusion
This DIY investigation highlights the complexities of engine modifications and component compatibility. While the VR6 OBD2 throttle body shares remarkable similarities with its ABA OBD2 counterpart, the initial issues encountered during the engine swap suggest potential electronic or software differences that are not immediately apparent from a physical inspection. The community’s experience is crucial in determining definitive compatibility. Have you successfully used a VR6 OBD2 throttle body on an OBD2 ABA engine? Sharing your experiences, especially specific part numbers and any necessary adaptations, could provide valuable insights for others undertaking similar projects.
