280SE fuel injection pump overhaul - Mercedes-Benz Forum

 
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post #1 of 6 (permalink) Old 02-10-2009, 08:46 PM Thread Starter
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280SE fuel injection pump overhaul

After letting my '69 280SE cab lay up for over a year (I know - bad, bad) it will not run. There is just a marginal amount of fuel output from #4 and #5 spigots. I have confirmed adequate fuel pressure and we got it to chug a bit by hotwiring the cold start solenoid. The pisser is that I had the pump rebuilt ($900!!) just a couple of years ago. can anyone offer advice on what to do now or does anyone know of a pump builder who specializes in these and lives on the Northeast - I'm hoping to find the guy who did the original overhaul to see if he can help me out now - I lost his name and receipt (I know - bad, bad). Thanks!
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post #2 of 6 (permalink) Old 02-10-2009, 08:57 PM
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Gasoline injection pump rebuilders are a rare breed these days. We get $1395 exchange for our rebuilt units. There was a guy in the NE a couple years ago, but he has effectively retired.

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #3 of 6 (permalink) Old 02-10-2009, 10:35 PM
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try this maybe?

Carefully remove side cover and check to see if the rack moves freely for the total travel. You must hold the lever and governor at max.
Then flush the entire unit with carb cleaner, then follow with ATF,
The rack must move on its own with NO resistance.

Hopefully that may do it,

Check for particles in the fuel filter can by dumping the contents out through a white paper towel pack (4)
If so, a particulate clog will be trouble.

Also you can check each stump on the MFI by disconnecting and cranking engine. those can really squirt if everything is correct.
UH do I need to say disconnect the sparking system before that?

OR just let someone else do this for $85 an hour.

Brian O
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post #4 of 6 (permalink) Old 02-11-2009, 10:01 AM
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Hans

Hans Utke
H&R Fuel Injection
Bohemia, NY Long Island

He is not retired, very helpful. He rebuilt my pump and cold start valves in my 6.3 which came out perfect.

The price I believe was 1300 for a complete overhaul with show detail.

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post #5 of 6 (permalink) Old 02-11-2009, 10:18 AM
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H&R is one of the few left (another in CA), but the fellow who retired is/was in New England.

"If spending money you don't have is the height of stupidity, borrowing money to give it away is the height of insanity." -- anon
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post #6 of 6 (permalink) Old 03-20-2009, 02:17 PM
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