2000 Mazda B2500 Q&A

2000 Mazda B2500 Question: Truck won't start by itself and stay started......

When u turn the key the engine will turn over but not start, but if I press the gas pedal while doing so it starts BUT if I immediately let off the gas pedal it will just die again. I have to turn the key while pressing the gas pedal to get it to start then hold the rpm at 1000 until it decides I can let my foot off and it won't die, the longer it warms up the better it would run. I replaced fuel filter because I was told fuel pump was fully operational and had the lines blown out, I cleaned the MAF sensor every so often because of know problems. It never threw a code except for 1 day just long enough for me to get it checked for a "bad MAF sensor" replaced it and it seems to of gotten worse. My fiancé drove it to work and back (about 40 miles) and went through over a 1/4 tank of gas. And she just text me and said its just started speeding up on it own, so is it a throttle sensor? It's never done that before -
Answer 1
Thanks for sharing your concern, I am sure it is very frustrating. This sounds like an idle circuit issue. I would first look at the air intake boot and make sure is properly secured and has no cracks or splits. The idle control solenoid is a some what common failure and does stick at times. I believe it is located on the air intake near the boot, try tapping on before replacing for a temporary test. Hope this helps Dan -
Comment 1
Thank you, I will check and try as soon as my fiancé gets home from work and let u know from there. Appreciate it. UPDATE: I jiggled the wire and tapped on the idle control solenoid and it started by its self 5 times separate times, ran without assistance, allowed me to run the heat and a/c without dying. U guys have no idea how much I appreciate the help, first time since I've had the truck that everything is fixed/figured out HAHAHAHA -
Answer 2
agree with #1 but where did you buy the maf sensor? aftermarket ones are not the best -
Comment 1
Its a BWD Fuel Injection Air Flow Sensor from Advance Auto Parts, how possible would it be that the sensor connector is bad as well? -
Comment 2
very poss the wiring may have isssues but adv auto parts a questionable at best -
Comment 3
Seanyj, As you have experienced there are many things that can cause your problem, might be cost effective in the long run to have your issue diagnosed before replacing additional parts. Dan -