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My 302 ford starts good cold but when it gets hot it doesn't want to start

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Fuel injectors on this one, or carb. bad injectors will do that

Posted on Jun 08, 2015


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Posted on Jan 02, 2017

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Check radiator fluid level. The heater core sets higher than the engine. If fluid gets low, air bubbles will go to the highest point. The heater core. Check temperature guage. Is engine warming up to normal range? If not change the thermostat. Also check radiator cooling fans with engine warm.
On my car if I set the heater control on anything other than "vent" both cooling fans come on and the engine will not warm up. (still haven't figured that one out) I just run the heater in "vent"

If heater warms up when engine is held at high idle(2000rpms) then cools down at idle, you most likely have air traped in the system.

Posted on Oct 11, 2008

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SOURCE: heater blows hot and then cold it has mind of its own

sounds like a bad thermostat

Posted on Dec 20, 2008

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SOURCE: hard to start hot or cold runs good when it starts

I think it may be time to change the spark plugs and wires.

Posted on May 18, 2009

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SOURCE: My 2006 Colorado A/C runs , starts to blow cold

Same problem on 2005 Colorado at work. A little research finds that this is a 'gas saving' system. It is designed to cycle often, resulting in less UP time on the compressor, which saves fuel.
HORRIBLE system!
We are going to refill the freon to exact specs and see how the gauges read.
Currently, when compressor is running, a nice cool temp is achieved. But while the compressor is off, the air gets a bit warm. it's 112 out today and this is unsatisfactory.
I found a forum which describes installing a resistor at a certain wire connection in the a/c module. This causes the clutch to engage for longer periods of time. apparently the only real fix at the moment.
I don't have that forum link with me.... so do a bit more research to find it.

Posted on Aug 04, 2009

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SOURCE: 1996 ford f150 inline 6 4.9l starts great cold but

Check for a bad temperature sensor. If there is any code, read it with a scanner, and it will usually tell you what is going on.

Posted on Nov 23, 2009

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302 engine. once it gets hot it cranks slowly and fails to start. (can be push started though) i replaced the starter still same problem why?

ford starters are subject to heat problems in the starter motor as they are close to the exhaust manifold
There is a heat shield available from ford spares but I found it not to be all that effective
The solution I found was to install an high performance stater ( used for modified engines) and there was no longer a problem

May 25, 2015 | 1988 Ford F 150

1 Answer

When its hot out my 2000 ford explorer with 302 runs sluggish like it has no power but when its cold it runs pretty good.

you might want to try cleaning the EGR valve could be sticking from excess heat. however that type of problem is usually picked up by the OBD2 and should send out a code, but if its minor enough you might not get a code or light yet. good luck but Id give it a try. appreciate a rating

Apr 25, 2015 | 2000 Ford Explorer

2 Answers

My 302 Ford is catburated and is in my ranger, it starts awesome cold but when it gets hot it turns over and tries to start hard but it won't start. What is the problem?

Check your plug wires at the plug for spark. Most likely loosing spark. Could come from distributor, cap, rotor, plug wires or coil. If you no spare at the wires, see if it has spark from the coil. Please report back and we will go from there.

Apr 05, 2015 | Ford Cars & Trucks

2 Answers

My 302 Ford is in my ranger and it starts good cold nut when it gets hot it dosent want to start. What is the problem

You have to determine whether the no start is ignition or fuel related. I would suspect ignition. Possible ignition control module getting hot causing problem. Quite common on older non fuel injected vehicles if this is what you have. If fuel injected, it could be a crank sensor of fuel punp issue as well

Apr 05, 2015 | Ford Cars & Trucks

1 Answer

Why is My 1986 ford f150 starts great in the morning but after hot it's like it's not getting fuel

What have you checked so far ?
Fuel pressure ? Fuel pump relay ? Good spark to plugs ?

Sep 05, 2014 | 1986 Ford F150 SuperCab

1 Answer

I have a 1988 F150 with a 302, the truck has a hard time finding a Idle

Many idling problems such as yours can be resolved by simply having the car tuned up ie , new air filter, change all spark plugs, oil change, etc... you'd be surprised by the outcome! Good luck.

Jul 11, 2013 | 1988 Ford F 150

1 Answer

I have a 2001 Ford Focus DOHC. Heater doesn't blow hot. Hot cold indicator switch clicks as i9t should when I turn indicator but it doesn't seem to change anything

Feel your heater hoses and see if they are getting hot..If so when your click from the switch ,,make sure the door is switching from hot to cold

Sep 16, 2011 | 2000 Ford Focus

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