Suddenly a whole lots of problems have occurred!!! Help!

HELP:
Can anybody help me diagnose this problem I have a 400 in my 1976 cougar with a new carburetor new distributor cap wire plugs rotor coil starter selenoid brake master cylinder. As of two nights ago I parked it running fine and went to drive it The next morning and it had these issues..
It was only idling at 2-300rpm, it stalled on me so I turned the idle screw all the way in and it's still only running at 500rpm's?it's very rough and has quite a bit of backfire, it's overheating, hesitates a little on the gas, and for some reason the brakes become very stiff and weak when
Experienced mechanics share their insights in answering this question :
My first thought is you have moisture inside your distributor cap. This is a very common issue with older vehicles. I suspect all these issues are caused by a single issue. Since it is overheating, I would certainly be checking your cooling system. I wouldn’t expect it to blow a head gasket, but your symptoms definitely fit. It could also be clogged carburetor jets.

With an overheating car, I would begin by determining which cylinder are misfiring. If cylinders are misfiring on only one head, I would suspect you have a head gasket failure. Whatever is overheating needs to be addressed. It is very difficult to diagnose a car when it is overheating.

Another possibility is the roll pin holding the gear on the distributor has sheared. This can cause overheating and all of your symptoms. I think I would begin by checking your timing. If it is way off, I would suspect this. While your there, inspect the distributor cap for moisture.

To summarize:

Check timing
Check for moisture
Check distributor gear
Check for head gasket failure
Clean carburetor jets
If none of this applies, diagnose your overheating issue.

If you should need further assistance, have a certified technician, like one from YourMechanic, diagnose your misfire firsthand for an accurate repair.

Good luck!

How to Identify and Fix Common car Problems ?

Our sources include academic articles, blog posts, and personal essays from experienced mechanics :

The number one cause for overheating boat engines is a problem with the flow of water to the engine. Most boats have a water strainer which catches harmful items before they can cause damage to your engine.
This is usually caused by the burning of the valves, pistons, cylinder head gasket, and scuffing on the cylinder surface. It can also be caused by incorrect valve adjustment, faulty tappets or hydraulic tappets, or incorrect valve timing.
When your engine overheats, it will seize up. This means that it will stop running. Not only will it stop running, it may potentially cause other major issues for the boat. For example, this may cause the engine head to crack, the metal to warp, burning oil, and more.
One of the most common ways an outboard can fail is when it overheats during use. There are a number of different reasons for why this happens; from a blockage or damaged component within the cooling system, to low engine oil, or a faulty thermostat.
Engines can overheat for many reasons. In general, it`s because something`s wrong within the cooling system and heat isn`t able to escape the engine compartment. The source of the issue could include a cooling system leak, faulty radiator fan, broken water pump, or clogged coolant hose.
The most common causes of misfires are worn, improperly installed, and mishandled spark plugs, malfunctioning ignition coils, carbon tracking, faulty spark plug wires and vacuum leaks.
A: If the engine misfire occurs only during a hot restart, checking fuel pressure is the place to start. If the ready fuel supply in the fuel rail on top of the engine is overheated immediately after shutdown, it may percolate or boil the fuel.
There is a simple test to determine if a thermostat is opening and closing properly. Place it into boiling water. It should open in the water and close when removed. If it fails, replace it and the gasket with new ones.
Increased friction results in increased heat production, so if your oil pressure is too low, it will cause the engine temperature to increase, and could even lead to overheating. If your engine temperature warning light illuminates on your dash, it could be as a result of a bad oil pump.
Leaks are the #1 reason a vehicle begins to overheat. Leaks in hoses, the radiator, water pump, thermostat housing, heater core, head gasket, freeze plugs and a few other things can all lead to problems with the vehicle`s cooling system.
Can an engine survive overheating? Yes – as long as you respond quickly and don`t let your car go into full meltdown mode, it should be repairable. Too much heat can result in further complications, such as cracks leading to significant oil leaks or loss of performance.
As temperature of an engine exceeds 230 degrees Fahrenheit, the engine is overheated. Above 245 degrees Fahrenheit, damage may occur.
Vacuum leaks, especially those that are confined to one cylinder, will cause the engine to idle unevenly and possibly misfire. This is because the vacuum leak allows additional air to reach the affected cylinder, diluting its air/fuel mixture.
Yes. While the damage may seem small initially, the longer you drive with a bad oxygen sensor, the worse the damage will become. Eventually, you may experience rough idling, poor acceleration, engine misfires, an illuminated check engine light, and failed emission tests.
Once a timing chain is stretched and has lost its integrity, the chain may skip a gear and lose the necessary coordination leading to an engine misfire. Repeated misfires could indicate a timing chain issue and should be investigated.
These accumulated deposits can result in spark plug fouling, leading to misfire. If the tip temperature is higher than 1560°F, the spark plug will overheat which may cause the ceramic around the center electrode to blister and the electrodes to melt. This may lead to pre-ignition/detonation and expensive engine damage.
Bad spark plug wires can interfere with the electrical current flowing to the engine, making it difficult for the engine to complete the combustion cycle. An incomplete combustion cycle can cause an engine to misfire, which means your car may jerk, stumble, or briefly lose power.
Myth:Mercury-bulb thermostats should be replaced because they are inaccurate. Fact:Mercury bulb thermostats are among the most accurate for temperature control within the HVAC industry. Cheap electronic thermostats provide inferior temperature control. Myth:Mercury bulb thermostats are hazardous and should be removed.
Although a mercury filled thermostat may last 20 years, or more, the mechanical parts begin to wear out long before that, becoming less accurate and therefore less efficient over time.
When the oil is whipped into a froth from overfilling, very little oil gets into the motor. This oil then gets overheated and starts to break down much like the oil in an underfilled reservoir. With very little oil filtering through the engine, everything starts to overheat.
How long can a car overheat before damage occurs? It only takes 30-60 seconds of overheating for permanent damage to infiltrate a vehicle. As soon as you notice signs of overheating, you need to act. Failure to do so might result in troubles like coolant leaks, damaged radiator caps, and a faulty cooling fan.
Sluggish or rough acceleration

When the engine misfires, you may have trouble getting your boat up to speed. Misfires often happen when your vehicle is under load while accelerating. This can result in slow or sluggish acceleration or a jerking motion while pressing down on the accelerator.

There is a simple test to determine if a thermostat is opening and closing properly. Place it into boiling water. It should open in the water and close when removed. If it fails, replace it and the gasket with new ones.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

Suddenly a whole lots of problems have occurred!!! Help!
ANSWER : My first thought is you have moisture inside your distributor cap. This is a very common issue with older vehicles. I suspect all these issues are caused by a single issue. Since it is overheating, I would certainly be checking your cooling system. I wouldn’t expect it to blow a head gasket, but your symptoms definitely fit. It could also be clogged carburetor jets.

With an overheating car, I would begin by determining which cylinder are misfiring. If cylinders are misfiring on only one head, I would suspect you have a head gasket failure. Whatever is overheating needs to be addressed. It is very difficult to diagnose a car when it is overheating.

Another possibility is the roll pin holding the gear on the distributor has sheared. This can cause overheating and all of your symptoms. I think I would begin by checking your timing. If it is way off, I would suspect this. While your there, inspect the distributor cap for moisture.

To summarize:

Check timing
Check for moisture
Check distributor gear
Check for head gasket failure
Clean carburetor jets
If none of this applies, diagnose your overheating issue.

If you should need further assistance, have a certified technician, like one from YourMechanic, diagnose your misfire firsthand for an accurate repair.

Good luck!

Sudden starting problem that happens sporadically
ANSWER : Hi there, thanks for writing in about your 1992 Oldsmobile 98. It is possible that the starter relay is failing. This relay is different than the starter solenoid that was likely replaced with the starter. The starter relay has electrical contacts which can burn or corrode with use, can fail with the erratic behavior you describe, and is relatively inexpensive to replace. It is also possible that the starter solenoid (which is part of the starter assembly) has a failure condition when hot. When you predict the problem to happen again or as it occurs more frequently, have a certified technician, like one from YourMechanic, come to your home or office to diagnose the starting issue and help you move forward with appropriate repairs.

hey good day. im joey from the philippines. can you help me out. i would really an opinion about the problem in my car. my honda c
ANSWER : Hi Joey. Unfortunately, it’s hard for us to provide you the correct diagnosis of your issue for two reasons. First, we don’t offer services or repairs in your country, so it’s impossible for one of us to come to your location and inspect your car. Second, without knowing maintenance details, it’s hard to tell you what might be causing the noise. In some cases, it can be due to loose cylinder head hardware; so it may be that the mechanic is correct. I wish we could help more, but that’s really all the advice we can offer. Good luck to you.

Zen Estilo K-Series
ANSWER : I am sorry – this will be hard to determine without more information, including your vehicle year, make and model. You say you’re hearing a knocking noise coming from the timing chain and it goes away after a few kilometers? Without more information, the only recommendation I can make is to hire an experienced technician like one from YourMechanic to inspect your vehicle’s engine noises and diagnose any necessary repairs from there.

I am having problems with my car overheating when the AC is on and I’m not driving. No problem while driving. Help please!
ANSWER : Hi there. This might be an issue caused by two possible sources. First, it’s possible that your thermostat is not working correctly or opening later than it should. Second, it is also possible that you have an obstruction of coolant somewhere in the cooling system; perhaps in the heater core or air bubbles trapped in the system. Issues like this can be tricky to diagnose, so it might be a good idea to have a professional mobile mechanic come to your location and complete an overheating inspection; to help you isolate the issue.

i need your help my wolkswagen 2005 doesnt want to lock 2 doors… i’m not sure if it’s a fuse problem.. when i press the lock but
ANSWER : Hi there:

If the driver side doors are the only ones that unlock when you press the power lock button, then it’s more than likely that you have a damaged main power lock control module or electrical relay to the passenger side doors that’s causing this issue. However, to be certain that you get the right repairs completed on your Volkswagen, you might want to have a professional mechanic complete a power door locks are not working inspection first.

Brake Light on, ABS light on, speedometer to zero and temperature some to zero. This problem sometimes occur and it’s not usual.
ANSWER : Hello. Sounds like you have multiple problems. Check fuses first of course, then check the brake light switch, are brake lights coming on when you press the pedal? Get the problem codes from the ABS system – it’s possible there is a wheel speed sensor failure that could cause ABS/brake light warning and speedometer failure.

The temperature gauge malfunction is likely a failing sensor on the engine (this is usually a separate temp sensor from the one going to the engine computer). Most auto parts stores will read the codes for you for free. I would recommend having a Check Engine Light is On Inspection completed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose these problems, give you an accurate assessment of damage and cost for repairs.

While diriving my 2017 honda civic my dash displayed powered steering (eps) problem, what does this mean?
ANSWER : Yes, all of those issues should be checked out, especially as the warning lights involve key vehicle safety systems like the steering system. Your vehicle is under warranty as it is brand new. You should bring the car back to the dealer and have them resolve the issues at no cost to you. If the issues recur, be sure to follow up, as needed, and if the issues are not permanently resolved, in a reasonable number of visits to the dealer, keep in mind that very specific, and very protective (of the consumer) state and Federal Lemon laws apply to new vehicles. I mention all this because you are driving a brand new car and yet all these warning lights have appeared. That’s not an expected outcome and thus you should follow-up promptly and make sure this gets fully and thoroughly resolved. If you have further questions or concerns, please do not hesitate to re-contact YourMechanic as we are always here to help you.