Yes, you need to pinch off that return hose on the accumulator because if the diaphragm is shot, then your gas just goes back into the tank and you have low pressure.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition

ok ok ok....going back out and to see if I can pinch that line off..just thought by bypassing the return that would let me know, but as I writing this, starting thinking that won't do it...that still doesn't tell the whole story..be back in a bit... I like that pic too Dave....!!!!! ha hahahha

no still doing the same as before after pinching the accumulator line..I have the correct voltage at pump..I don't know about the flow.. I don't have the tools to check that. So I'm kinda in a pickle. Any ideas on how to check the flow another way?

"1 liter in maximum 40 seconds at a minimum
voltage of 11.5 volts at the fuel pump."


You could disconnect the incoming line at the Fuel Distributor and measure 1 liter (1.05 qt.) during a 40 second fuel pump operation.

If you don't have a measuring bowl, you could use a 2 liter Coke bottle (or do you guys drink RC in Tenn.?), just kidding. Measure and mark a 1/2 full line on the bottle and check the Fuel Pump delivery rate.

Come on Brent, I have faith that you can fix Dammit, dammit!

__________________

1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

If you don't have a measuring bowl, you could use a 2 liter Coke bottle (or do you guys drink RC in Tenn.?), just kidding. Measure and mark a 1/2 full line on the bottle and check the Fuel Pump delivery rate.


Alright now Dave!!! Now I maybe married to my brother's sister..but got to draw the line at the R.C. remark!!!!!!!! ewings dont wanna me come dooown thair with my hounds and hunt you uuuup....ha ha ha ha


But back to the serious stuff, I gotcha. That makes sense. For some reason the MB tag has got me losing my common sense. I'll get on that tomorrow and post my results.

Did the flow test...and well it flowed 36 oz in 40 seconds..so it maybe a little weak but not bad. well actually a liter is 33.8 oz so guess it is close to minimal standards. So I'm thinking I've got an accumulator (another one) swap that out just because I love laying under it (ha ha). So which way now do you think?

How about fuel pressure readings?

Well, it looks like your pump, fuel filter, and accumulator is good. How did you get so many parts, did the PO give them to you when you bought the car?

First thing to do, go get yourself an ice cold RC and a Moon Pie, kick off your shoes and relax. Then get to work.....



Next, go back over the Fuel Distributor. Re-check the plunger. You need to somehow verify that the plunger is moving when the round plate is going down. Your symptoms sound like a stuck plunger.

Enjoy the RC and Moon Pie.

__________________

1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

He states the pressure is good (80psi) to the Fuel Distributor, but might be a good idea to re-check.

__________________

1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

Changed the accumulator. it actually seems a little better. The plunger is working. I can here it. Still believe I'm losing pressure somewhere..I'll recheck the pressure again let you know what it says here in a minute..




oh and Dave....the RC cola and moon pie festival is in October..You should come up and enjoy. We can go frog giggin and cow tippin..shoot I'll even spot ya nice coon skin cap.

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ok here something curious..went out to check the pressure. Now its showing 76psi..but here's the funny part..it started and ran for about 6 seconds (no laughing, that made me excited). tried it again..and it ran for another 6 seconds. it almost smells (from the exhaust) like its either running (haha) rich or flooded..do you lean it out through the tower screw? or i'm getting excited over nothing

Adjust the EHA and measure the current through it before you adjust the fuel to air mixture for Lambda (tower screw).
Oh, leave the CIS gauge on so yu can double check the pressure as you fiddle with the EHA. You need to read the pressure difference between the upper and lower chambers of the distributor.

OK OK OK hold your post..Dave your going to love this!!!!!!!!!!!!!!!!!!!!!!! I went back to pull the plug out of the motor to see if they were fouled..Pulled number 1 out and number 2..So i dedcided to whip it over to relieve the cylinders of any gas..DAMMIT STARTED!!!! It ran until I cut it off..Cleaned plugs off and put them back in..now car doing the same as before...it's dead..take number one out only..It runs..!!Put the plug back into motor and it wont start..Take it out and it runs but the plug has to be complete out of the head for it too run....I"M DEAD SERIOUS THIS HAPPENING>>>>>>>>ha ha ha ha ha ha....what now? You think if i take a tire off it will run right

Unplug the plug but leave it in the engine, what do you get?

Weird!!! What is the spark plug brand and number? Also, check the spark plug wire firing order assignment. You bought the car not running so you never know.
Keep it coming....it's getting good.

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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible