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1977 mercedes 350 sl''oiled'' the number 7 spark plug hence poor running.is this a bad sign re engine condition? running ok for now but only covered 30 miles since plug replacement 115000 miles on clock,very good service history

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A wet & dry Compression test will confirm if rings etc is problem. You can run a little hotter plug to prolong fouling by oil, sometimes it helps.

Posted on Jul 22, 2009

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Posted on Jan 02, 2017

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When I start the engine of my Toyota carina ,it runs alright but after moving for about 3 to 4 kilometer, the engine starts junking ,when it's switched off the engine falls to start,but after


wow , 1977 , we dont get 77 cars here ever, they are relics.

a BLAST FROM the pass, (i have 66 and 68 cars,now, so....)

if the engine is good, compression near spec> x4 150PSI min?

The fsm covers all these numbers, so you look them up. ok?

and spark is good.,!

then the carb is bad. fixing 1977 carbs\' (done 100) are very hard.

lacking kits, and good cleaners (illegal here now).

lacking parts, inside, (toy dont sell em;\')





CARB 101:

Stalls only hot?

choke not going to full open hot? fix it or upgrade to manual.

float level wrong,? fix it. (google that)

JET, nozzles and emulsion paths blocked? or loose?

JET main fell out, and is rolling around in bowl?>

fuel pressure too high?, some shade tree used EFI pump:? oops.

fuel pressure too low 1psi, (read toy spec, get it right)

air leaks at the carb base gaskets, or there in intake.

idle set too low?



(bad carb)

how is that,?

Dec 26, 2014 | 1977 Toyota Carina 1.8

1 Answer

I'm having rough idle and smoke all of a sudden with my golf mk4 The oil warning lights up in dash. Oil level ok. Spark plugs not burning well. Replace spark plugs, changed oil filter, changed


Smoke is not a good sign. Running rough is not a good sign. Oil light not a good sign. You could have a combination of bad things, most likely expensive. Suggest professional help. Smoke can be bad rings or holed piston. Low oil pressure can be bad bearing or oil pump.

Nov 04, 2014 | Volkswagen Golf Cars & Trucks

1 Answer

Spark plug diagram, 1977 cutlass supreme 350


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Fig. 4: Oldsmobile-built 350, 455 V8. Engine firing order: 1-8-4-3-6-5-7-2. Distributor rotation: Counter-clockwise

Hope helps.

Oct 11, 2011 | Cars & Trucks

2 Answers

I have a 1995 Mercedes SL500 with 114,000 miles. The fuel filter was changed approximately 10,000 miles ago. The car has run fine except this last weekend. After filling the car with premium fuel the car...


your fuel pressure between 30-35psi is showing good at the moment. If you due suspect bad fuel pumps try and drive the vehicle with the fuel pressure gauge attached to monitor if it does drop when driving. Also make sure you have spark at all the spark plugs as a bad coil or a bad spark plug connector could be bad. They are available separately. You can also confirm this by doing a resistance check across the ignition wires. The ohm value should be printed on the spark plug connector. Generally they are about 2k ohms. No spark at one cylinder could cause the same symptoms but usually sets a code. The fuel pump will usually sound louder then normal when they are about to fail. Since there are two fuel pumps for the vehicle it is possible one of them is starting to fail. The throttle actuator can also cause drive ability problems but will generally cause the ASR light to come on. I would also look at the distributor caps and rotors as a potential cause as they can cause your symptoms with no check engine light. If possible drive the car with the fuel pressure gauge attached to monitor fuel pressure and with the engine at idle start pulling the spark plug connectors off and on to make sure the engine stumbles every time. Let me know what results you get and I will try to help further diagnose the issue.

Nov 15, 2010 | 1995 Mercedes-Benz SL-Class

1 Answer

When do the spark plugs need changed


Spark plugs like any electrical device become worn over time. Spark plugs also work under extreme condition. The use of cheap fuels will leave deposits, poor maintenance, bad air filters, old plug wires, all these items can cause a spark plug to fail or not perform at its peak level. Also spark plugs use a gap or Electrical bridge that is used for high voltage to arc across. The larger the gap the hotter the spark until you reach a point that the coil can not bridge the gap and then you get a misfire. Also when a plug gets deposits from either oil, poor fuel, carbon this will shorten the gap and cause a weaker spark resulting in poor performance, wasted fuel and engine dieseling or Run on after the ignition is turned off.
These are the simple reasons for spark plug replacement.

Jul 19, 2010 | 2005 Dodge Caravan

1 Answer

Find tdc 1977 chev 350 engine


first remove number 1 spark plug, this is the front first plug on the driver side.put your finger over the hole and have someone bump it over until you get compression blowing your finger off the hole tell them to stop. then look on your harmonic balancer and line up the notch on balancer to the wide gap on the pointer. when this is lined up your then on number one compression stroke.

Jul 11, 2010 | 1978 Chevrolet Caprice

1 Answer

My mercedes ml 350 will start then just stop I wait 8 minutes and then it will start, it chugs then start help?


If this is also paired with very poor acceleration, the fuel pump and pressure need to be tested. This could be the starting signs of a bad fuel pump and possible plugged filter in the left wheel well area.

May 31, 2010 | Mercedes-Benz ML350 Cars & Trucks

2 Answers

Oil around spark plug and car mis fires


The oil around the plug may be a sign that the valve-cover needs a new gasket. Oil on the plugs can cause a misfire but it is important that you check everything over. The misfire could be due to defective wires, boots, coils, spark-plug/s, injector/s, and so much more. Take a look at the cars maintenance history, Maybe it is over due for a complete tune-up or oil change. The car is 11years old, how many miles are on it? How was it running before this?

Apr 29, 2010 | 1999 Lincoln Town Car

1 Answer

1977 mercedes 350 sl not pulling on all 8 cylinders/rough idle


Check injectors they clog occasionally try a good fuel line/injector cleaner

Jul 20, 2009 | Mercedes-Benz SL-Class Cars & Trucks

1 Answer

I need to know cylinder configeration, and the two distributors spark plug wire configeration,what plug wire to set timing light on each distributor and which distributor to set first. Hope you can...


hello,your firing order 1-5-4-8-6-3-7-2,,,standing in front,left side of your engine is your cylinder 1 to 4,remove your valve cover then rotate your crankshaft,using 27mm socket,observe the movement of camshaft,and look for the timing mark in crankshaft,(ot) then you can install your high tension wire,begin on cylinder number 1,ty

May 02, 2009 | 1990 Mercedes-Benz Mercedes Benz Sl Class

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