Check the vacume pipes for leaks and cracks.
Im hoping this is the engine as there is a number of different engines codes. but any sensor like air intake sensor or map sensor will need cleaning if it has bee stud as the dust will settle and stick to them, then engine will not get right information, also check the timing as a belt stud in the same place for a long time can stretch and even mold to the engine a can cause timing to be out. any engine that has been stud for long time even 5 years is a long time to be stud, will need an oil change and filters, if the spark plug leads are hard or crispy they will need replacing they should be soft and be able to wiggle. Iv heard of seafoam being used on an engine not been run for 10 years and that seam to clean out all the hard build up in the engine, but there is others you can use, but you need one that will be able to be sucked into the engine by the intake. injectors can stick or be clocked with old fuel residue. idle controller will probably need cleaning out aswell, use carb cleaner, MAF/MAP sensor needs a made for cleaner MAF has its own cleaner and is only for the MAF would thing carb cleaner would be fine for the map sensor, spray it inside and shack out again do this a few times. just to make sure its clean and any muck is out.
SOURCE: 1998 Chevy tahoe Hard to start when cold
Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.
SOURCE: 1998 Chevy tahoe Hard to start when cold
replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump
SOURCE: aircondition does not drain fould molding smell
yes the dealer has a special machine that sanitizes the AC system and kills the mold that causes the smell, the chemical they use is not approved for sale to the public so they must do the job.
SOURCE: 1985 corvette--will not start, has code 15,
Hello dstachler.
50 PSI fuel pressure on that engine is within range.
Yes, a temperature sensor out of range can cause a no start.
If the engine is cold and the sensor reading high will not allow enough fuel to fire the engine.
Cold engines require more fuel.
It's like trying to start a carburated engine cold without a choke.
I often have seen it the other way as well. A hot engine with a low reading will flood the engine.
So there is some advise for you. Hope it helps you along.
Thank you for using FixYa.
KL
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