My car starts fine first thing in the morning or when it has been left for a length of time.. but if i stop for less than a few hours it just doesnt want to start, have had a new fuel filter, plugs and even a coil pack!!! any ideas???
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Re: wont start when warm
If no lights (including headlights) come on at all and the car won't turn over you need to make sure the battery cable connections are clean and tight. If you meant you don't get any warning lights on the dash then I would guess your mechanics are wrong (it probably isn't having the staring problem when they are looking at it) about not getting spark. Replace the crank position sensor as it can cause that no hot start problem and it will get worse to where the car stalls when hot and won't restart. A new crank position sensor should solve your problem. Get a few quotes before replacing it because some garages overcharge for working on SAAB's.
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I had this same problem with my 2003 H2, my mechanic found that the fuel diaphragm was cracked and this was allowing my truck to flood. If it was a cold start, the extra fuel would evaporate and it would start fine. It actually got to the point where I would stall at a stop light or stop sign at idle. The part was is the neighborhood of $175.00 and about 1 hour of labor to install.
.When the injectors leak they flood the engine and holding pedal to the floor or waiting hours for fuel to dissipate. See if you have spark and fuel when it wont run. If there is no spark check the electronic control module under the cap
Car no start problem is sometimes very difficult to confirm. You try all the possible things, but still you get no fault and problem is still the same.-------- In that case, you need to check few things individually. Check the spark,the battery,the crank, the fuel and other most possible parts. Click this link below for more details:-- http://howtobyme.blogspot.com/2011/10/car-troubleshooting-tips.html
Check your battery first. Cold weather does horrible things to car batteries... if it's more of a grinding sound I would say that your starter gear is bad. I believe they call it a ring gear? I had a similar problem with a kushman scooter that I use to deliver snowcones through the neighborhoods. It has teeth that need to engage and if those teeth have been grinded down it will have a hard time engaging....