QuestionQUESTION: I had replaced the fuel pump, distributor cap and rotor, and ignition module because when i had purchased the car it didn't start to begin with. After all of that it wouldn't start. Randomly after not touching it for 2 weeks i went back to test if everything was getting voltage and during the tests it started about 6 times and would shut off after a few minutes. I have no idea what is wrong with it because it starts so it must not be something major wrong with it.
Any ideas?
ANSWER: Corbin:
I believe the most likely cause of your problem lies in the fuel delivery system. Either a semi-blocked fuel filter OR a defective sensor "giving" the control computer (erroneously)incorrect information. When first started, the engine is running in "start-up" cold engine mode. This apparently is ok. As it continues, there is a transition to 'warm' mode which seems to be at fault. There are relatively simple tests for all sensors..an excellent source is to subscribe to a website ($25/year/vehicle) <alldatadiy.com> Complete mechanics-level info can be had there. Well worth it, if you are a do-it-yourselfer!
Hope this helps,
Jerry
---------- FOLLOW-UP ----------
QUESTION: Okay, thanks! I'll have to give that website a shot, but do you know like what kind of sensors could be the problem? I know there is a ton of them.
AnswerCorbin:
Sensors to be tested are: Throttle position, coolant temperature, Oxygen, and air mass meter. Instructions to check those are found in the reference I sent you earlier; they are too lengthy & detailed for this space.
Also, check for vacuum leaks; a typical symptom of a vacuum leak is when the engine runs when cold, but not when warm. To make such a check, spray carburetor cleaner around all hoses and vacuum lines with the engine running...if the engine speeds up, that is the site of a leak...usually where a hose meets a termination.
Keep trying...you'll eventually find the problem!
Jerry
