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Old 01-26-2007, 06:40 PM
pentoman pentoman is offline
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Join Date: Jan 2002
Location: England
Posts: 1,841
Quote:
Originally Posted by a2aa View Post
OVP (Over voltage protection)
can restart ?
surges before stall mostly on deceleration?
engine can run(rough) w/o relay plugged?


FPR (fuel pump relay)
No restart?
stall anytime any rpm?
No relay, no run?
If bypassed, will start.
can still hear Fuel Pump preload on ignition on and still have a bad relay?

Am I correct in assuming these symtoms for these components? Please add or change as necessary.
OK I've had both so feel qualified to post!

FPR - Only ever heard of it failing to start. Doesn't usually cause cut-out once on the move. Not sure why..
No relay no run, correct
Bypassed will start, yes.
If you hear the fuel pump run when you switch the ignition on, it is fine (on that occasion). Other times you turn ignition on and fuel pump doesn't run. This is the usual intermittent faulty FPR.

OVP - can run without, yes (cold starting sucks, ASD and ABS lights will probably light)
I've run my 2.5-16 without OVP briefly, it doesn't run that badly. Perhaps when cold, or if the weather was really bad it might be worse. But when engine is warmed it seems to run pretty much as normal.

Just my experiences in 5 years of ownership!
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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg
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