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#16
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My vehicle only has ONE pump.
It was replaced once a while back. It could be the problem. I just have to find the time to test it. Hopefully this weekend.
Thanks!
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J.H. '86 300E |
#17
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nmake sure its not leaking, which a fuel pressure test will show
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1986 300SDL, 211K,Dealership serviced its whole life 1991 190E 2.6(120k) 1983 300D(300k) 1977 300D(211k) |
#18
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J.Hidalgo: My guess is the CPS---same thing happened to me. This is my experience from an earlier post:
Quote:
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#19
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Thanks Mark,
I guess I will have to get a CPS. So far, everything I measured is within limits...including the CPS. I even got an used coil from a junk yard. No luck!
Right now, I can hear the fuel pumps powering up, the car will star but, it will die within 5 seconds like if the engine was choking. Did you access the CPS from the bottom and did you have to remove the oil filter?
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J.H. '86 300E |
#20
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I accessed the bolt from the top but you do have to get underneath to determine where the cable is attached to the intake manifold and release the cable from these clips. I believe I did remove the oil filter to be able to see the attachment bolt but you can determine that as you go. A very bright flashlight will help you locate the bolt. IIRC it takes a 5mm allen socket, universal joint with a very long extension. Be sure to gunk the area well before removal---very greasy---and to clean out the allen head so you don't strip the the head and create a real nightmare Let us know how it goes. Mark
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#21
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Mark,
I will probably try it. What part of Jax are you in...? I am in Orange park...
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J.H. '86 300E |
#22
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I am on the Westside---Lake Shore Blvd. Mark
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#23
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Mark,
PM sent.
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J.H. '86 300E |
#24
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Quote:
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#25
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The coolant temp sensor is a likely candidate as well, especially since the symptoms changed when you disconnected it. In a thread here somewhere, I posted the temperature/resistance curve chart. You can see if your coolant temp sensor is out of spec with an ohmmeter and this chart.
A really off temp sensor will make the car die, ask me how I know..... -tp |
#26
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I already ordered the CPS.
The sensor may be next...
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J.H. '86 300E |
#27
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Good news and bad news...
The good news, I replaced the CPS succesfully.
The bad news, I did not fix the problem. Replacing the CPS is not that bad. Access to the 5 mm allen bolt is tight and hard to reach but, I did it from the top without removing the oil filter. For reference, you can shine a flashlight (from the drivers side) down between the oil filter and the fire wall and you should be able to see the allen bolt. It is located below and to the right of the oil filter. The old CPS a resistance of .849 k and the new one .829 k. Both well within specs. However, the old one had a very small piece of insulation missing between the sensor side and the wire. I took some pictures and I will post in the future. I also measured the resistance between the two pins of the coolant temperature sensor: 4.67k at 62 F or 14 C It starts all the time but, it dies right away. What do you guys think...?
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J.H. '86 300E |
#28
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I'm not sure it's your entire problem, but that reading is out of spec. At 14 degrees Celsius, your reading should be right around 3K.
4.7K corresponds to roughly 5 degrees C. Your car thinks the engine is colder than it actually is..... This would in theory lead to a rich condition. Are you checking the right sensor? There should be TWO elements in your temp sensor if you are checking the right one. The single element temp sensor is for your temp gauge ONLY. The dual element sensor is the one that matters as far as how your engine runs. You need to check the value of both elements, and they both need to be in spec. Even if it's not what's killing your car, an out of spec temp sensor will cause havoc with your MPG and performance. -tp Last edited by tinypanzer; 02-27-2009 at 11:09 PM. |
#29
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#30
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I am sure it is the right sensor...
I am measuring the resistance between the two elements. A picture of the sensor is attached.
I also suspect two diffferent problems...Hopefully, the CPS resolved one of the problems. Now, if I could only start the car...
__________________
J.H. '86 300E |
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