ChrisWenke
Supra Stalling and Power Loss
Summary of the thread
A 2000 Toyota Supra IV is experiencing stalling at idle, reduced engine power, and an active check engine light. The initial suspicion is a faulty fuel volume regulator. However, it is suggested that the issue may stem from a defective high-pressure fuel pump, which can cause inconsistent fuel pressure and affect the regulator's performance. After replacing the high-pressure fuel pump, the vehicle's performance issues are resolved.
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4 comment(s)
ChrisWenke (community.author)
Interesting! So, if the high-pressure fuel pump is defective, would that directly cause the fuel volume regulator to malfunction or show as defective during diagnostics?
kurt_walter4
Yes, a failing high-pressure fuel pump can definitely impact the fuel volume regulator. The regulator struggles to maintain the correct fuel pressure if the pump isn't providing a consistent supply. Think of it like a dam struggling to control water flow when the river feeding it is fluctuating wildly. I'd advise getting it checked at a reputable workshop.
ChrisWenke (community.author)
Thanks for the advice! It turns out the high-pressure pump was indeed the culprit. The repair cost me 1510€, but at least the Supra is running smoothly again.
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TOYOTA
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SUPRAIV
kurt_walter4
That sounds familiar. I had similar symptoms on my Supra. Have you checked the high-pressure fuel pump? In my case, it was faulty and causing inconsistent fuel pressure. It's like trying to run a marathon with a clogged air passage.