Question about Chevrolet Suburban 1500

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After warm up engine starts missing tranny acts funny

Already changed out computer all problems start after engine is up to operating temp

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What year is this truck ?

Posted on Aug 08, 2009

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2002 Ford Mustang GT, CAR STARTS UP FINE WHEN COLD. Hard to start when warm No Check Engine lights come on.


Think about how the vehicle is acting. Starts fine when cold, hard to start when warm. In these computer operated systems, the computer runs everything. Starts fine when cold: the computer has the engine in cold start mode putting more fuel in till it warms up. Temperature sending unit in the manifold sends a message to the computer telling it to stop the cold start mode and it stops dumping excess fuel into the cylinders and it runs fine. IF, mind you, IF the temperature sending unit is faulty, it's not telling the computer to stop the cold start mode and is flooding the engine with fuel cause it's sill in cold start mode. This is my take away on your situation and the temp sending unit is something to check to be sure it's functional. Check it out. I hope this WAS the answer to your problem my friend. It's typical. Luck to'ya Bro.

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2004 linconl aviador Have code p0301, p316 I


If you are saying everything is ok when the engine first starts but number one starts to miss when at operating temp. Sounds like the number one coil has developed a internal crack that opens up when hot or at operating temp..causing a miss.change it.but before changing the coil check the spark plug wire it may be breaking down when hot..good luck

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Overheat and accelerating automatically


Time to change the thermostat if you not already have done so. This is the cause of most overheating problems, although a good radiator flush may solve the problem also. The fan will stay running until the engine coolant reaches the proper parameters and then shut off.

Jul 28, 2017 | 2003 Volvo S40

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1987 mercury cougar 5.0. When the engine is started cold, it stalls after 30 seconds. To keep it running, you have to rev the engine until it is warmed up. While reving the engine, it feels like it misses...


hi,
plug the EGR line and see how it acts. better yet put a ball bearing in that line and reconnect it to the EGR and see if it goes away. definate vacuum issue somewhere. tranny modulator, check every line coming off the firewall manifold. the throttle position sensor might need to be replaced. its one of the only moving sensors under there. on my 89 tempo I could adjust my idle, move that idle screw around so it idles up a bit to get it out of that dead area on the TPS. plug wires after that. those notchbacks are getting extremely rare, and with a V8! put it far far away....

jm

Mar 20, 2011 | 1987 Mercury Cougar

1 Answer

2.0d x-type 2005 Est. Starting problems when engine is warm


Ok, time for car school. The vehicle is operated by the computer, every electrical concept that is. When the engine is cold, it starts fine because the computer has placed it in "cold start mode", putting more fuel into the engine than normally would until Once the engine is warmed up, a temperature sending unit or temp sensor tells the computer to change to normal run mode. IF said temp sensor is faulty and is not telling the computer to make said change, it stays in cold start mode, still dumping excess fuel in the engine that is now not required, cause it's warmed up. Like keeping the choke closed on older vehicles. Now I think you can answer your own question, when this no start action is happening after warm up and it always starts fine when cold, what's the first thing you check ? Right, the unsuspected temp sensor. Change that and no more start problem. Have a wonderful day. Glad I could be of service.

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Hi, I have a 1998 2door accent 130i. Starting fine as usual. as warm up progresses I have what sounds like ignition missfireing until temp meter just starts to show temp increase. Then no more missing and...


yes you hit the nail right on the head there,, its the tem sensor playing you up, its telling the car's computer its warm when its still cold and it cuts back the fule like pushing in the choke,,, this causes the engine to miss fire and lack power till its warm change the sensor

Feb 17, 2010 | 2000 Hyundai Accent

1 Answer

Cold starts ok warms up shakes and stalls


check engine coolant temperature when it gets warmer, or at operating temperature, and verify that the temperature gauge is showing warmed up to operating temperature. If the coolant temperature sensor tells the computer the engine is cold it will over fuel and miss and the engine will die. When cooled down it will run fine until it warms up. Also could be coil if it starts missing after warmed up.

Aug 18, 2009 | 1990 Ford Bronco II

1 Answer

Starting problem not related to battery or charging system.


You will, a cold start problem that is.

By American it is the last thing we produce, everything else is imported.

Nov 23, 2008 | 2002 Honda Accord

1 Answer

Rough idol. O2 sensor and ECM have been replaced. Running rich. Black smoke. Won't pass emissions.


There is a Temp sensor for the computer that tells the Motor what the Temp is of the engine and when they do decide to take the big nap. It usually is that sensor remember to ask the temp switch that operates the computer control Not your temp Gauge. There are two so make sure you get that one, Alright that should get you going I just had the same problem on a chevy, Its tell the engine its is well below operating temp, It probably always starts good when it has sat all night or its cold out and then after its run for awhile it starts acting up missing running extremely rich and burning black smoke, I sure hope that helps you out a 15.00 dollar sensor can sure mess up your hole day,

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