HELP - om616 won't rev past 2000 RPM
HELP - om616 won't rev past 2000 RPM
I fueled the engine from external can to eliminate the possibility of a clogged filter and at this point my only guess is an issue with the governor inside the IP. Is there a way to diagnose that? What other things could I check?
ponkokanada
11-18-2012, 06:50 PM #1My 1976 om616 developed an intermittent problem in the lest few weeks. The engine will only accelerate up to about 2000RPM (my best guess as I don't have a working tach) and the top 1/4 of the accelerator travel causes no difference. This problem is intermittent but it doesn't seem to depend whether the engine is warm or not or if it's under load.
I fueled the engine from external can to eliminate the possibility of a clogged filter and at this point my only guess is an issue with the governor inside the IP. Is there a way to diagnose that? What other things could I check?
Have you checked your linkage?
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
Simpler=Better
11-18-2012, 07:13 PM #2How did you bypass the spin on filter under the hood?
Have you checked your linkage?
Newbie-read this: Cheap Tricks
617.952-220k-Getting built up
larsalan I guess I need to look at this stupid ass drip shit. What you have to like mess with those elements on the pump? What a fucking hassle. then use some wire to hold the throttle open or some shit?
1984 300D 4-speed ~200,000 miles
7.5mm M-pump, GT3582 turbo, F-Tune Performance intake/exhaust manifolds, A/A intercooler, 315 nozzles, Enlarged prechambers, Bosch 044 feed pump, Custom lightweight flywheel with 240mm clutch, Lowered, 17" AMG rims - 300 hp OM617 project
1985 300D 280,000 miles RIP
2001 F350 7.3 DP tuner, 4"exhaust, S&B intake
led-panzer
11-18-2012, 07:30 PM #3Is there a butterfly inside the intake? Make sure its opening or remove it. Can't remember if they had them that early....
1984 300D 4-speed ~200,000 miles
7.5mm M-pump, GT3582 turbo, F-Tune Performance intake/exhaust manifolds, A/A intercooler, 315 nozzles, Enlarged prechambers, Bosch 044 feed pump, Custom lightweight flywheel with 240mm clutch, Lowered, 17" AMG rims - 300 hp OM617 project
1985 300D 280,000 miles RIP
2001 F350 7.3 DP tuner, 4"exhaust, S&B intake
-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!
sassparilla_kid
11-19-2012, 01:26 AM #4I'm pretty sure I've seen 616's with butterflies on the intake as late as '78 at the yards before, but I could be wrong
-1982 300D Turbo, 280k miles, ALDA apparently maxxed, fram 8038, 12 lbs boost, non-egr manifolds, W/M injection, 4 brake light mod, Gen II w126 front rotors/calipers, 4-speed swap
In the works: A/W IC, adjust pump, turbo rebuild (w/60 trim comp wheel)
-1980 300SD, 110k, project car. Goal is to get it lookin' like it did on the showroom floor (body and interior wise, not necessarily under the hood )
-1974 240D, FRESH PAINT!!!!!!
My guess is that you have a throttle linkage issue, make sure the butterfly valve is opening all the way when you push on the throttle.
I have not personally worked on the older style IP system, so this recommendation is from my understanding of how the system works. Hopefully someone who has worked on this type of system will chime in.
Graminal95
11-19-2012, 01:37 PM #5You have the older style om616 which means you have the vacuum operated injection pump. The intake has a butterfly valve that is connected to the throttle. When your making lots of vacuum then throttle is closed and the IP knows this, and vise versa when your at full throttle there will be no vacuum, and the IP injects a lot of fuel.
My guess is that you have a throttle linkage issue, make sure the butterfly valve is opening all the way when you push on the throttle.
I have not personally worked on the older style IP system, so this recommendation is from my understanding of how the system works. Hopefully someone who has worked on this type of system will chime in.
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