Question about 1999 Chevrolet Tracker
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Posted on Jan 02, 2017
DO some quick checks : fuel filter , fuel injectors (when was the last time you serviced the fuel injectors?) and last fuel pump ,hope this helps AJ
Posted on Jun 08, 2008
it is most likely **** in your gas tank the **** gets stuck in the fuel pump and then it wont send fuel let me know what you think
Posted on Dec 09, 2008
Here is the most common cause of surges and stalls and low idle rough idle, it is the idle speed control air-bypass valve and throttle valve (IAC for short), they get full of gunk over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
Posted on Feb 12, 2009
Your problem sounds a lot like what some older Chrysler cars used to do when they had carburetors and chokes.
What would happen is that the choke would open a bit early and if the timing of that event coincided with a stop, since the engine was a bit lean at that point, it would stall. (otherwise you could drive right through it and never have a problem).
With an injected engine, the same fuel air ratio needs to be maintained, but it is done differently. In a carbureted engine limiting the air supply would richen up the mixture. In an injected engine, instead of limiting the air supply, more fuel is added instead.
This is controlled by the computer which reads the signal from the coolant temperature sensor and "knows when the engine is hot enough to stop adding fuel. If the coolant sensor is slightly out of range, you may get to a point where the computer "thinks" you are up to temp, but you are not.
So the conclusion would logically be to replace the temp sending unit...but not always. A thermostat that is not operating perfectly, a slight vacuum leak, a slight egr valve leak, a slight problem with the idle control motor, a glitch in the throttle position sensor or dirt on the wires inside the bore of the mass air flow sensor can also change the composition of the air fuel ratio, as can a bad spray pattern from an injector or two.
I'd begin by replacing the thermostat and temp sending unit, then follow up with careful testing of all the components I mentioned, using a haynes or chilton manual as a test guide.
One not factory recommended way of cleaning out the fuel system is to add 3oz of acetone per 10gal of fuel. Acetone will change the vaporization rate of the fuel and cleans as it passes through the system I've personally tested this and contrary to what has been said about damage it can cause, it has never caused a failure anywhere in any system I've used it in. (even at higher concentrations)
You asked for ideas...so I gave you a bunch of them.
Just don't go replacing everything without testing...that is a waste of time and can get really expensive.
Posted on Feb 09, 2010
Testimonial: "sorry. I changed it. I am too much of a novice to understand complicated language. No offense."
the problem you are discribing would lead me to belive your fuel filter is clogged which is a simple fix 3 dollar part at any part store or on the worse hand your fuel pump itself could be weak you can open the gas tank cover and have another person turn the truck key to the on position without going far enough to start you will hear a faint whining noise if it is going bad or a louder noise if it is fine Good Luck
Posted on Mar 03, 2010
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