My 603 is acting weird. I thought it was clogged fuel delivery. I got ants in my SVO. So pulled tank cleaned out still haven't replaced. I am currently running out to a gallon jug of fuel. I have gotten to the point of feeding strait from the jug to the lift pump then strait into the IP. There is great delivery to the IP. And actually great return to the jug from the IP.

So the symptoms is that it does not shift up. If I let it idle for 15 min then go for a test run the engine has great power and shifting is fine. I can go up to 60-70 mph and cruse for about a mile then will loose power and will down shift and cannot go past about 30mph at about 3500 RPM. And the farther I go like this the less power I will have till I can hardly get back home. It also will not go into reverse.

I attribute this to poor fuel delivery of some sort bit maybe I am wrong. Also read that some others where having similar problems and when they checked they where actually not getting fuel to a few injectors. So while the engine was running I loosened each hard line at the injector one at a time and every single one when loosened spewed fuel and was did affect running engine. So they are all getting fuel and working.

It is as if there is a restriction in the amount of fuel delivered but it builds up during idle so that I get that good performance for the first mile then loss of power.

So any suggestions? It has to be clogged in the IP. I have run plenty of purge through and purge returns clean as can be. I'm about ready to take it to the dealer... Out of ideas.

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87 300D 167,000 miles

Maybe there's an exhaust restriction such a clogged oxidation catalyst.

Sixto
87 300D

Hum didn't think of that. I've been stuck fuel. But I will try anything. How would u suggest testing that?

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87 300D 167,000 miles

It's loud and smelly but you can disconnect the downpipe from the turbo and go for a ride. If there's no emissions testing where you are and your conscience permits, you can replace the cat with a test pipe or repeatedly jam a poker into the exit end of the cat to extract the core in pieces.

Sixto
87 300D

You would need to drive with the Exhaust disconnected before it or tap into the pipe in front of it and hook up something to measure the Exhaust Gass Pressure.

Try pulling the Vacuum Shutoff/Servo Tubing/Line off and plugging it. If that fixes the problem something is causing the Crankcase pressure to build up and the Crankcase pressure is pusing the Vacuum Shutoff into the Shutoff position.

Although I don't see the symptoms matching this; maybe there is an issue with the Fuel Pressure Relief/Overflow Valve not holding pressure; or simply not enough Fuel pressure.

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84 300D, 82 Volvo 244Gl Diesel

are u talking about the engine shutoff lever? I don't understand how that moving down would creat my symptoms. Well I'm thinking whole I'm typing. So if it was half way down it would limit fuel that much ...

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87 300D 167,000 miles

I don't think I have a cat. Isn't it a big tin kinda tank/pipe?

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87 300D 167,000 miles

I have also removed all that emissions stuff on the passenger side under the air cleaner and the exhaust return valve and sealed the exhaust and intake ports that they where connected to.

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87 300D 167,000 miles

The oxidation catalyst replaces the trap oxidizer. The cat is along the exhaust pipe beside or behind the transmission. It looks like a catalytic converter. This is a TD exhaust system which is similar except for the transverse muffler. The cat is the first device flowing from the engine -



The shutoff actuator/STOP lever has some effect in cutting fuel when it's anything but fully vertical. Beyond disconnecting the vacuum line, wire it in the vertical position while diagnosing. Note that the key won't shut off the engine while the vacuum hose is off and the lever is wired fully vertical.

Sixto
87 300D

Oh, you would know if you had a cat. The hair gets everywhere.

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."

Well I will be damned....first time I have read about having ants in the fuel.....

Maybe going out on a really big limb here, but perhaps....the fuel system is all gunked up from svo....or suger....better go check my fuel

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You have a Vacuum Valve/Servo/Solenoid on your Fuel Injection Pump that connects to another Vacuum Valve on your Steering Colum Lock that is actuated by your Key; and, that Valve intern is eventually connected to your main Vacuum Line.
Turning the Key off connects the Vacuum and the Vacuum Pulls on the Diaphragm inside of the Vacuum Valve/Servo/Solenoid and pulls the Rack inside of the Fuel Injection Pump into the shutoff position.

There is a Diaphragm inside of the Vacuum Valve/Servo/Solenoid that faces the inside of the Fuel Injection Pump. The inside of the Fuel Injection Pump is exposed to the Crancase Pressure.

If your Crankcase Breather System is parially obstructed or you have some condition that creates a lot of Crankcase pressure that Pressure pushes the Diaphragm of the Vacuum Valve/Servo/Solenoid intothe Shutoff position.
I don't know if that also pulls on the Manual Shutoff Lever or not but if you are driving the Car you are not going to see the Manual Shutoff Lever Moving if it is moving.

Crankcase pressure is somewhat the same as Blow-by except that Blow-by has the Oil Vapor and is not just puressure.

On the earlier Models the Vacuum Valve/Servo/Solenoid has a Brown or Brown with a stripe Vacuum Tubing connected to it. But I don't know if the same color code is used on your year and model.

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84 300D, 82 Volvo 244Gl Diesel

"I got ants in my SVO"

Ants don't eat Diesel Fuel but might eat vegitable Oil.

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84 300D, 82 Volvo 244Gl Diesel

When Cats cough up a Hair Ball at least that pretty much stays in one place.

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84 300D, 82 Volvo 244Gl Diesel

I wish you would come tell my sister's cat that...

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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco... " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes

1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod

2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."