Question about 2000 Chevrolet Suburban

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When my chev 2000 sub is warm hard to start

When the engine is cold it starts fine when it gets warm it takes a little more to start engine

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I have a really good hunch that your problem is the spark plugs. As with this when your engine gets warmer the plugs get hotter and they start to lose power when you try to start your engine. I am not positive on this but I am really certain, but with this problem there can be a number of things happening.

Posted on Jan 30, 2009

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2000 ford excursion starts up fine after about an hour when the engine warm up and turn it off it will not restart but it seems after it cools it starts fine and go through the same process


The temperature sending unit tells the computer that the engine is cold when first started. After engine is warmed up, if the computer things engine is still now warm, it's still in cold start mode and dumping too much fuel into the engine and flooding it making it hard t start or no start at all. I'd have the temperature sending unit in the engine replaced to see if it's cured. It's separate from the gauge or light and they would show warmed up, but the computer is not getting the message.

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When the car is warm after a while it is hard to start, takes a few cranks. when it starts it smells like fuel. on cold start it is fine.


Kinda sounds like the ECM or "start mixture" control module is faulty or is getting a bad input from a sensor. For example, it man not be getting a proper temperature sense from the exhaust manifold or the intake manifold water temp sensor. So, every start seems like a cold start....

If your cold start is on a "cold" engine - fine. If your cold start is on a "warm" engine - problem. Mixture is too rich for a warm engine.

Again, could be sensor sending a bad temp signal... or the control module not responding to the signal.

A bit too complicated a problem to exactly troubleshoot via long distance... but you now have a starting point.... -Jim

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new lifters?,,,,,,an over haul could help.....but it takes alot of money.....

does it sound like almost a "diesel engine"

you know.....there are products that can help release lifters that have become sticky or noisy.......

alot of brands and chemystries but "RISLONE" could help....

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Chugs, acts like it's not getting gas once warmed up. Idle's fine


This problem can be several things. When your engine is cold, your computer is in a "closed loop" and just pretty much keeps the engine running until warmed up. After reaching operation temperature, the computer starts reading all the sensors. If one sensor is not connected or is defective, you will experience performance problems. Most of the time this will turn on the check engine light, but not always. Second is the fuel pump. This too will cause erratic engine problems.

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