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Engine wont start in the heat

My engine wont start in hotter weather but has no problem starting when its cold outside.

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  • Jessi M
    Jessi M Jan 04, 2014

    I thought I posted this but the car is a 1993 Ford Mustang

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  • Expert
  • 110 Answers

Does your car have a inlet air temp system

Posted on Jan 04, 2014

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 99 suburban wont start sometimes

I had a similar ongoing problem with my 1999 GMC Suburban C1500, it occurred only in the hottest days of the Texas summer. In addition to not starting, the truck sometimes exhibited symptoms of misfiring while driving at highway speeds, as if the engine seized or as if there no fuel being delivered to fire.
I found a small garage mechanic who swore he could fix it after years of taking it to the dealer and other franchise repair shops and getting the same answer "we can't find anything it like you described, it won't do it while we're testing it, bring it in right away so we can get the history codes....blah, blah, blah". I always thought it was due to an intermittent electrical grounding issue. Anyway, long story short, the small garage mechanic was guessing a lot of the time, but after changing the fuel pump, the sending unit, fuel injection system and many return trips to the garage with me saying 'that wasn't it, it's still doing it" it finally turned out to be a faulty wiring connector link in the harness assembly ABOVE the FUEL TANK that came from the pump or sending unit. When it got hot the link would melt and create a short, when it cooled a bit it would still conduct. We replaced the wiring connector and 4 years worth of unexplainable intermittent starting problems disappeared. I spent $2K to $3K over the years, when it finally turned out to be a hidden $12 wiring connector.

Good Luck.

Posted on Jan 18, 2009

GM Elec
  • 1000 Answers

SOURCE: 4.3 vortec engine , engine noise, knocking or

The knocking or ticking is going to determine if it is in the top end, lifters, push-rod or rocker arm issue or the bottom end that would include pistons or bearings.
If it is a ticking noise, it will more than likely be a valve train issue.
If a knocking noise, piston or crankshaft related problem.

Attached is a web site that you can listen to a piston slap which is a known issue for your 4.3.
Listen to the noise and see if it sounds similar to your problem. A piston slap will generally sound as though it is coming from the central area of the engine.
Listen to the recording and let me know.
Regards,

Posted on Apr 19, 2009

  • 13 Answers

SOURCE: 1999 Chevy Blazer won't start in cold weather?

sounds like spider injectors there like $450 alone mine did that last winter looking at easy 700 to fix

Posted on Aug 03, 2009

  • 97 Answers

SOURCE: bmw diesel wont start in cold weather, i have

YOU MIGHT HAVE TO INSTALL A BLOCK HEATER TO OVERCOME THIS PROBLEM

Posted on Jan 06, 2010

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1 Answer

Turn the key and it will not start


cold weather kills batteries this time of year...heres why..most batteries are a chemical factory..the acid and water separate as the battery discharges..also the chemical process is lessened when the air temps go below freezing by around 50% or more depending on the age of the battery..in extreme cold areas, external heat sources are required to keep engines warm enough to run..in alaska for example,the batteries are taken out entirely and put inside to keep warm..sometimes a fire pit is used to warm the engine from below (red hot coals no flame)..also in very cold weather, the engine oil will get very thick..in some cases the oil will actually glue the engine semi solid..locking it up..if its a cheaper oil that whathappens..I like 20 miles north of st louis in illinois and when it gets below 30 degrees outside i place a under cabinet 350 watt heater(used for keeping food warm to serve) upside down under my engine overnite..this keeps the block warm and the oil thinned out..and works very well for me..my car will start whe no one elses will in my neighborhood..hope tyhis helps you..

Feb 09, 2013 | 1991 GMC Sonoma

1 Answer

Brake and engine lights on, heat blowing cold air


Sounds like you have a hobgoblin in your electrical system, they usually just away over time

Jan 31, 2013 | 2003 Kia Spectra

1 Answer

My toyota sequioa will not start when the weather outside is cold..... later it 'll start when outside is warmer.


I would get your battery load tested. Most auto part stores will do it for free.


Scott
ASE Certified Automotive Technician
ASE Certified MED/HVY Truck Technician

Jan 23, 2013 | 2001 Toyota Sequoia

1 Answer

Car never reaches operating temperature (cold weather) thus little to no heat inside


change the thermostat, sounds like it could stuck open and wont allow the engine reach operating temp, also test the constant control relay module located to the right of the battery as your facing the front of the car, also test coolant temp switch it might be defective and producing a high voltage that would cause the fans to constantly operate no matter the temp. Hope this helps

Nov 25, 2012 | 2003 Hyundai Tiburon

2 Answers

I have a 1987 ranger 2.3 EFI and sometimes it will not start when it's cold. after it warms up outside it starts. When it does start it runs great. It always starts when warm. some times it will


Timing belt being off one tooth will not cause this problem but rather loss of power and hard starting all the time,

in the cold it will not start, the engine will spin but wont fire is this correct?

There are many things that can cause this, a little testing will be needed, the first thing that comes to mind with the ford and cold weather is the coolant temp sensor, it give computer a false reading and can cause hard starting or even no start, a scan tool would be helpful to see what temp it is give computer.
The best way to narrow this down to to check for spark when it wont start, a weak coil in cold weather will cause this problem or bad coil wire to cap, but if you can see if it has spark and let me know,
another test is to check fuel pressure, to see if it is getting fuel, and the fuelpump relay,

Let me know if it has spark or fuel when is does not start, good day

Oct 01, 2012 | 2002 Ford Ranger Regular Cab

1 Answer

My truck wont start in the cold weather, could it be the glow plug relay?


Does it start when the outside temp is above freezing? if so then start with the relay also check the engine codes. Disconnect the negative terminal for 30 minutes. This will reset the diagnostic computer. Reconnect and attempt to start as usual.

Nov 27, 2010 | 2005 Ford F 250 Super Duty

1 Answer

Temp light flashing after starting.outside temp.-17


Extreme cold weather is causing coolant to contract and fluid level is reading low level ... After starting with the engine warm the temp light should go off due to expansion of the coolant ... Solution: Add a small amount of coolant to compensate for cold weather contraction. Good luck!

Nov 24, 2010 | 2004 Volkswagen Jetta

1 Answer

1995 jeep cherokee 5.2 wont start when cold outside when it starts i backfires then runs after its warm


Sounds like your heated 02 sensor's heating element is not working. Is the check engine light on, when it starts and is running bad? Have the engine codes read to see if the 02 sensor is defective.

Oct 11, 2010 | Jeep Grand Cherokee Cars & Trucks

1 Answer

98 chevy malibu wont start when cold outside. I replaced the battery and the ignition control module. I don't know what else it could be.


if you are mostly having trouble with cold weather,i would check the engine temp sensor,it tells the computer how cold your engine is so in the morning the computer will increase fuel like an old carb with a choke

Dec 08, 2009 | 1998 Chevrolet Malibu

1 Answer

Car wont start in cold weather...think it may be


Will it start with a boost? Have you had battery fully charged and load tested? Battery tested at a garage, or autoparts stores, are usually free.

Nov 16, 2009 | 1983 Plymouth Turismo

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