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OVP Relay : Should I Bother?
Hi Guys,
Ever since I bought my 190E over 4 years ago, I did tried removing the OVP (out of curiosity) while the engine is running. There is no difference in the idle as opposed to my mate's car (also a 190E) where the RPM drops to around 500 RPM, and the engine shaking violently. But my car runs great though...Performance and fuel consumption as per normal spec 190E. The question is....Should I bother???? Is there anything I should check?? Anyone with same experience? Care to comment?? And...oh the fuse on top of the OVP is good though... Thanks guys. |
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You don't say what the problem is....is it the idle? If it ain't broke, ....
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1986 560SL 2002 Toyota Camry 1993 Lexus |
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With the OVP removed, your car will have no power to the FI computer and certain other control circuits. That means it will run open circuit, fail-safe mode. Emissions will likely be high, and driveability will suffer. If you are noticing no difference, your mechanical adjustment is probably slightly rich, and you will fail any smog testing. Cold weather problems will occur too.
OTOH, you should check if a PO has already jumpered around the OVP. Steve
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'91 MB 190E 2.3 '08 RAV4 Ltd 3.5 '83 Lazy Daze m'home 5.7 |
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All the cold start enhancements are built into the electronics, so with no OVP the engine may not cold start or only with great difficulty.
Since the OVP provides power to the ABS, if it fails the ABS light will be on, which is a telltale sign of OVP failure. If it works, there's no point replacing it, but keeping a spare handy is a good idea. Duke Last edited by Duke2.6; 04-14-2006 at 12:35 PM. |
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Why don't you need overvoltage protection?
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Kent Christensen Albuquerque '07 GL320CDI, '10 CL550. '01 Porsche Boxster Two BMW motorcycles |
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Quote:
I have to agree with Steve's comment. I strongly believe the car is running on fail-safe mode. Maybe the previous owner adjusted the air fuel ratio to slightly rich, and as I live in a tropical climate, that explains why I have no cold start problem. BTW Steve, care to elaborate more on how to check if a PO has already jumpered around the OVP?? Thanks all... |
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Quote:
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Quote:
Steve
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'91 MB 190E 2.3 '08 RAV4 Ltd 3.5 '83 Lazy Daze m'home 5.7 |
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