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#1
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fuel pressure question - KE-III
I did some work on our 1991 190E 2.3 that involved removing the electric variable pressure regulator on the side of the fuel distributor - easier access for removing the idle air rotary valve. The car had sat overnite before removing it, but I still expected some fuel to spurt out. No more than a drop came out. Is this normal? If there is pressure leakdown, would the injectors be the most likely culprit?
The car pretty much runs normally, but mileage is less than I think it should be, idle is sometimes a bit uneven or high, and the engine bangs around when started - but always catches quickly. Thanks for any input. Steve |
#2
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That should be SYSTEM pressure & not injection pressure. SO the fuel accumulator, fuel pump check valve, OR fuel pressure regulator would be likely causes of fuel pressure bleed-off.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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Thanks, I'll check those too, since I guess then that what I am noticing is abnormal. My concern about injectors is also from the following:
On startup (warm or cold) the engine responds quickly, but uneven firing for a couple of seconds. The condition is least violent if I wait until I hear the pump stop, then I start it immediately. Engaging the starter before or later than that I get the roughness. My guess is no gas or gas leaking thru the injectors is at fault? Steve |
#4
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i have the same problem on my car,the car fires up but idles unevenly for 2 seconds ,then stabilises.
i read somewhere that it could be the injector related |
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