Quote:
Originally Posted by mbzman
From what I've read 9 times out of 10 the valve is defective. I just replaced mine this year and my car only has 70k miles. They do seem to get old with age and crack causing fuel to leak. Pretty easy to spot if it is leaking.
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If it is leaking between the distrib and the EHA it is just the O-rings....any leaks out the rear-side means it is toast.
In my experience though the EHA has a huge influence in power, starting, MPG...everything.
My wagon for example -- Original EHA -> 13mpg Perfect fuel pressure... I swapped it out with a junkyard. Same fuel pressure, 17mpg. No change in driving patterns. Tested over 10+ fill ups. Makes no sense...but the hydroelectronic valve can wear or get gummed up I would guess.
When I bought my 260E...failed smog horribly, would bog down as soon as you accelerated hard then clear up over 3k rpm....Fuel pressures dead on. Swapped it out, completely different car. Just bought a new one last week and it starts much nicer and idles a little smoother. Still chasing down my poor fuel economy though. I'll get to the bottom of it.
It is a shame they are over $220...so its really a crapshoot since you cannot 100% say it is bad, or 100% say the one you got at the junkyard or on ebay is 100% GOOD.