Question about 1990 Pontiac Bonneville
The first thing I would check would be the fuel pressure - pump may not be reliably starting. Besides that try turning the key off-on several times (to get extra prime shots) and see if that makes a difference.
It can be also possible that fuel regulator is got weak or the ignition coil is getting moistured due to cold weather.
This problem is seen in many other car models too.In cold weather the fuel pump, the coil the hoses etc etc all gets contracted and very tight and when weather gets warm or engine gets warm, then it expands so the flow of fuel starts and engine starts normally.------
In some cases its noticed that fuel freezes in the injector and that blocks the flow of fuel in cold weather and engine requires to be warm to get it started.----
Get the tune up done for the parts and get fuel pump, fuel filter,m the coil ,the spark plugs , the injector, the fuel regulator, the fuel and other parts serviced.This will help.If any part tested weak then get it replaced.
This should help.Thanks.Helpmech.
Posted on May 21, 2011
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Posted on Jan 02, 2017
Tips for a great answer:
Reason 1 - Gasoline, like any other liquid, evaporates less when it is cold.You have seen this -- if you pour water onto a hot sidewalk it will evaporate a lot faster than it will from a cooler place like a shady sidewalk. When it gets really cold, gasoline evaporates slowly so it is harder to burn it (the gasoline must be vaporized to burn). Sometimes you will see people spray ether into their engines in cold weather to help them start -- ether evaporates better than gasoline in cold weather.
Reason 2 - Oil gets a lot thicker in cold weather. You probably know that cold pancake syrup or honey from the refrigator is a lot thicker than hot syrup or honey. Oil does the same thing. So when you try to start a cold engine, the engine has to push around the cold, gooey oil and that makes it harder for the engine to spin. In really cold places people must use synthetic motor oils because these oils stay liquid in cold temperatures.
Re ason 3 - Batteries have problems in cold weather, too. A battery is a can full of chemicals that produce electrons The chemical reactions inside of batteries take place more slowly when the battery is cold, so the battery produces fewer electrons. The starter motor therefore has less energy to work with when it tries to start the engine, and this causes the engine to crank slowly.
All three of these problems can make it impossible to start an engine in really cold weather. People either keep their cars in heated garages or use "block heaters" to get around these problems. A block heater is a little electric heater that you plug into the wall to keep the engine warm.
i hope it was convince answers
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