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Shaking problem on start up 1989 300E
I have posted this problem before and I have gotten some really great advice. My 1989 300E has a problem shaking when I start it up. The rpms do not hold. I have to press the gas pedal to keep the car on high idel so the car does not shake and sometimes the car stalls. I have to start the car 2 - 3 times to get the car to stay on (this happens sometimes). After driving for a couple of minutes the car is great. When I get to where I am going I will turn the car off. I will get back to the car after 20 min and the car starts up great. When the car is sitting for a couple of hours the problem comes back. I should mention that there are some times that the car starts up great, this is usually when it is a bit warmer outside but not all the time.
This is a list of parts which I have changed in the last couple of months: Distributor rotor Distributor cap Voltage protection relay Water temp. sensor Battery Neutral saftey switch Fuel filter Both Fuel pumps Please help!!! Fab |
#2
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Have you checked your sparkplugs? One may be fouling up.
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And Sparkplug wires?
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1989 300E 144K |
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The sparkplug wires are 4 years old and the spark plugs are 1 years old. How do I test the wires?
Thanks |
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Would a fuel pump relay cause this problem?
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In my experience, a faulty fuel pump relay either prevents the car from starting or causes the engine to die while underway.
I doubt your shaking issue could be attributed to an FPR. My 2 cents.
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein" |
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Quote:
The indie perofrmed a leak down test and found that one of the vavles was sticking open when cold. He inserted soe sort of metal shimmie and the valve was working better. the best thing, no rough morning/cold idle. I am not exactly sure of the explanation above. all I know is: 1. He did a leakdown test 2. He inserted some sort of shimmie on one of he valve springs 3. The rough idle went away forever 4. It cost less than $200.00 (as opposed to $2k) Have your indie try it.
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Current Benzes 1989 300TE "Alice" 1990 300CE "Sam Spade" 1991 300CE "Beowulf" RIP (06.1991 - 10.10.2007) 1998 E320 "Orson" 2002 C320 Wagon "Molly Fox" Res non semper sunt quae esse videntur My Gallery Not in this weather! |
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1990 300SE
Engine 103.981 Chassis 126.024 I too have been experiencing the same rough cold (meaning engine has not been started in 8 hours or more) start up as mentioned above. I just bring the rpms up manually to about 1000 after starting and hold the idle there for 15 seconds, and then I let off the pedal and the engine idles beautifully. I know this isn't a fix, but it does work for me. |
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If all the above problems are related to hydraulic lifters, Larry Bible on this site had a great suggestion that I have used with good success: Run a diesel oil in your engine for a few oil changes. Use a 15w-40 type. The diesel oil has better cleaning and oil impurity suspension qualities. It helps in cleaning older engines and their valve train.
Haasman
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'03 E320 Wagon-Sold '95 E320 Wagon-Went to Ex '93 190E 2.6-Wrecked '91 300E-Went to Ex '65 911 Coupe (#302580) |
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Thanks for the suggestion but I thought it was a bad thing to use deisel oil in an non-deisel vehicle.
Fab |
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Warm up regulator?...
..does the 300 have one? If not, what does it use as a compensator for cold engines?
Symptoms are pointing (me anyway) in that direction or possibly a temp sensor failing (a LOT cheaper fix)... Search the forum - it's a common enough problem that its posted with the correct solution I'm sure... Kevin P.S. - search "cold start" and you'll most likely find the thread with your solution
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"Dangerous with a wrench...and not smart enough to know it" Stable (in order of acqusition): '84 500SL, 280SEL (Euros) '77 280SE. '90 560SEL '79 450SEL 6.9, '95 C280 (totalled by daughter 8/07) '81 280SL (rescued) '88 300CE '86 560SEC '95 C36 '01 CL55 DD's: '04 S500 4Matic (SWMBO) '04 F150 Crew |
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I have already changed the water temp sensor and I also changed the ETC sensor.
Is there another temp sensor that I should look for? Thanks Fab |
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Fab
Quote:
Haasman
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'03 E320 Wagon-Sold '95 E320 Wagon-Went to Ex '93 190E 2.6-Wrecked '91 300E-Went to Ex '65 911 Coupe (#302580) |
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(Might seem a silly question but the last time I caught a diesel discussion mid-thread I did ponder, just for a minute, the practicalities of putting a bottle of high-detergent ATF into my petrol tank to clean out my injectors )
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1987 300e manual 250,000 km (sold) |
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It think putting ATF in a gas car is a quick way to kill the cat.
The oils are compatible. It is that the diesel specific oil suspends dirt particles better and also has, as I understand it, better detergents. I am about to change the injectors on the 93 190e. I am wondering if your car, being a 1989 300E, might not also be a candidate? Every so often before an oil change, I will run a double-dose of Techron Fuel Injector cleaner in less than a full tank. I will drive the car fairly hard (once warmed up) and it does seem to help. But if your injectors are leaking and stubling at startup is a sign, no cleaner will cure the problem. Haasman
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'03 E320 Wagon-Sold '95 E320 Wagon-Went to Ex '93 190E 2.6-Wrecked '91 300E-Went to Ex '65 911 Coupe (#302580) |
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