My 1997 E300 is extremely slow - Page 2 - PeachParts Mercedes-Benz Forum

Father Of Giants · #16 07-02-2019, 06:00 AM

Quote:

Originally Posted by 97 SL320

Cue " I wear my sunglasses at night. . " and the movie Dawn Patrol.

#1 in gears 1-2 At full throttle the cat will not go past 4300-4500 rpm. It will hover at 4500 and not up shift.

Does it ever upshift if you lift the throttle? If it will not shift up as you say it does, how do you ever get out of 1 st gear?

What do you mean by " goes into neutral " ? How do you know it is in 3 - 4 - 5 if the trans goes into neutral? Does the engine rev freely past 4500 when this occurs?

If you actually put the shifter in neutral during issue # 2, what would happen? If after this supposed neutralizing event, do you have to shut the car off in order to regain automatic shifting ( get it out of limp ) ?

At what % throttle does this shifting issue occur? If you reduce throttle slightly will the trans shift?

The farther into the throttle you are the later the trans will shift, this is normal. If the engine is down on power the RPM will hang and trans not shift.

Why 6 cans? How much does the manufacturer call for?

The shifting problems only occur when the kicksown is engaged.

When I say go into neutral, it seems the car is about to kickdown but it never grabs the gear. The kickdown is useless on my car.

99% throttle input is fine, but if I even try a soft kickdown it just revs freely.

The car never goes or went into limp mode. I need to shoot a video of what I'm experiencing.

First I'll check ATF level. I don't like throwing the parts shotgun, but kickdown switch and transmission 13 pin connector are going to get replaced soon. Those are my prime suspects.

Zulfiqar · #17 07-03-2019, 09:57 AM

606 NA should upshift at 5500 or 6000 rpm at WOT

Father Of Giants · #18 07-03-2019, 10:28 AM

I was hoping to get my diesel purge today, but I won't because FedEx is the carrier. Running the diesel purge would effectively bypass the tank strainer if it where the problem.

jake12tech · #19 07-03-2019, 10:59 AM

Quote:

Originally Posted by Father Of Giants

I was hoping to get my diesel purge today, but I won't because FedEx is the carrier. Running the diesel purge would effectively bypass the tank strainer if it where the problem.

You could do that without diesel purge if you wanted to see if that was your problem.

Father Of Giants · #20 07-03-2019, 12:03 PM

Yeah you're right

97 SL320 · #21 07-03-2019, 04:45 PM

Quote:

Originally Posted by Father Of Giants

I was hoping to get my diesel purge today, but I won't because FedEx is the carrier. Running the diesel purge would effectively bypass the tank strainer if it where the problem.

Your previous post says you want to run 6 cans. What does the manufacturer recommend?

Father Of Giants · #22 07-03-2019, 08:22 PM

Quote:

Originally Posted by 97 SL320

Your previous post says you want to run 6 cans. What does the manufacturer recommend?

They don't specify an amount, I just want to run it till it's clean and clear.

Diesel911 · #23 07-03-2019, 10:51 PM

Quote:

Originally Posted by Father Of Giants

@ Diesel911 my car is a NA OM606, didn't know these came with cats, is it the big box shapped thing before the resonator? The only way I would know without spending money would be to run open headers and floor it!

About the crankcase situation, well my crank case gases are going straight into the atmosphere until I rig up a catch can. Don't crucify me.

About smoke during acceleration, my car has absolutely none, not even the SLIGHTEST haze. I'm quite proud of that really.

Wouldn't a failing lift pump cause hard starting? Or so I thought.

@tjts1 I cleaned the intake runners and the cylinder head ports when I resealed the fuel system

You need more fuel volume and pressure when going faster then you do to start. So it depends on what is wring inside of the Lift Pump.

There is 2 threads where people rebuilt their lift pumps on similar Engines. One had the symptoms he was having.
Repair Links
Fast navigation http://www.peachparts.com/shopforum/diy-links-parts-category/146034-fast-navigation-do-yourself-links.html

Also the Fuel Pressure Relief/Overflow valve has a plastic piece inside of it that can distort.

97 SL320 · #24 07-04-2019, 08:03 AM

Quote:

Originally Posted by Father Of Giants

They don't specify an amount, I just want to run it till it's clean and clear.

OK. I'd run a can or two then drive the car for a week then give another can. Sludge builds up over time and won't dissolve completely. The first cleaning will soften sludge then driving will clear some away. You will then be able to use a second can to continue the process.

Think of a bucket that has mud on the bottom. it can be rinsed out but some will be stuck to the bottom. If you let it soak for a while then rinse again, more will come out.

Father Of Giants · #25 07-04-2019, 09:20 AM

Appreciate the responses, but the more I drive it the more I'm convinced my transmission is dying.

1,2, and 3 flares a tiny bit. I'm still going to run a possible lift pump rebuild and checking the overflow valve.

97 SL320 · #26 07-04-2019, 12:43 PM

If you put the shifter in 1st and toggle switch in " S " mode and you can't get the engine to run to redline ish , the engine is down on power.

Same goes for 2nd and SW in " W " ( in W mode the trans starts in 2nd )

Father Of Giants · #27 07-04-2019, 03:03 PM

Quote:

Originally Posted by 97 SL320

If you put the shifter in 1st and toggle switch in " S " mode and you can't get the engine to run to redline ish , the engine is down on power.

Same goes for 2nd and SW in " W " ( in W mode the trans starts in 2nd )

Tried that, only goes to 4500rpm.

97 SL320 · #28 07-04-2019, 05:33 PM

Quote:

Originally Posted by Father Of Giants

Tried that, only goes to 4500rpm.

Then it is highly unlikely you have a transmission problem, you have an engine power problem.

That said, if the torque converter stator sprag is seized, you could have a limited top road speed however that isn't likely given:

1) You are struggling to get a 1 - 2 - 3 shift. A seized sprag would allow goodish acceleration at lower road speeds since loads are low.

2) There would be a loud whistling noise from the torque converter.

3) Trans temps would be very high triggering overload codes.

4) That evil limp mode specifically designed to take advantage of the motoring public even though there is noting wrong with the car would kick in. ( Well according to a thread in the tech section )

On the other end of this, if the stator sprag was free wheeling, acceleration would be slow but top speed unaffected and there would be no noise.