scottsails2

Gentlemen, It appears that the ECM is cutting voltage to the Fuel Quantity Actuator. Twice while driving the car at 55 mph the engine quit and the voltage dropped to zero. The ECM gets 12 volts from pins 37 and 54 there voltage never dropped while the engine quits or chokes. Several times the engine chokes and the accelerator does not respond. Sometimes it dies, sometimes it goes into limb mode, or sometimes it goes back to normal. Is this the ECM malfunctioning or the Fuel Injector Pump fuel rack failing that is causing these problems?
I do not have a dealer that I have faith in to solve the problem, only ones that take your money. How do I find a indy with a Das Xentry? I live 20 miles west of DC and in desperate need of help with my daily drive. Scott 703-216-7367<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

Telco man

Having similar issues Scott , how did you end up fixing your problem please?

Plutoe

Big mistake in the word "simular"----scan the car and post the codes

Telco man

Thanks for your reply, the error code is P 1622

Plutoe

You are correct P1622 is the IFI shut off actuator(SOV)

If you have the appropriate diagnostic equipment, you can do a guided test to confirm the resistance is between 7.6 and 8.6 ohms or not.(The value is taken at pins 2(lower right) and 3(upper right) If not, it means(SOV) replacement.

If between, than you either have bad cables or a bad ECU.

Remember you can't swap a used ECU and test. You need a virgin(new) ecu for that, but once again if you have the correct equipment you don't need all that HS, you can do all that through guided tests------Sorry

EdzBenz

Yikes. Sounds like you have a project on your hands. However, you have some direction on what the problem is. Please let us know what the end resulting remedy is. Good luck.

Telco man

Thanks for your guidance on this frustrating issue Plutoe. I will Confirm if resistance value at Fuel SOV (between 7.6 and 8.6 ohms). Then re-check the wire harness with intake manifold removed.

Is there a possibility that the Fuel SOV is malfunctioning because the crank position sensor may be intermittently defective and a causal effect to the P1622 code, i.e. the Fuel SOV shuts down? Just wondering if these sensors are prone to intermittent failures? All the Best!

Plutoe

On a diesel system, I just do not think so.

FYI, I went back and edited my post(5) with more info!!

Telco man

Thank -you Pluto for updating your analysis, and sharing your knowledge, I am v frustrated with this car. could you please explain or further identify the pins or connector you are referencing? Are these pins on the fuel SOV push on connector? I hope to get these tests completed next week, and will post details.all the best

Plutoe

'''''''''Are these pins on the fuel SOV push on connector?'''''''''--------yes the four pins are exposed on the SOV when you remove the connector!!!!

Remember to do that you have to expose the pump buy removing the charge air system and that can be tricky(the car must be jacked up to remove from the underside one lousy EGR bolt---need a two foot extension) if you have ever done it before. If not get a daily subscription to WIS and all will be clear.


Working on MB's is very frustrating, but diesels are much more simple

TonyFromWestOz

What was the outcome of this issue?
Tony

Telco man

My problem was the connector at the SOV. Initially the trouble was the SOV, and I believe pull off plug connector pins were damaged somehow when the plug was removed and reinstalled. The stalling problem was fixed by cutting off the plug and soldering a used plug (with about 8 inches of wire) into the circuit (heat shrinks etc.) . I spent several $1000.00 before finding cause. Worst car problem I ever had.

It may be Very difficult to find a used plug to insert as a new one complete with harness is v expensive. Car is perfect today, runs perfectly with the new SOV and used plug. If you need more detail don't hesitate.