Mazda 3 sport engine light on and jerking

SOURCE: 2003 Mazda Mpv jerks when idling abd breaking

Check to see if you have a MPV that has been included in the recall for the PCV line. Yes it is difficault to get to on your own, however they have special tools to reach behind the manifold to remove the line and install a new one. If you do it on your own it is very difficaul and will take a few hours as a I did before I found out about the recall. The service dept. should have asked you about the recall when you went to get the part from them. Where I got pissed was when they did replace the hose the faulty line had fouled the pcv valve and they did not bother to replace it and that is tucked under the intake manifold and under the fuel rails.

SOURCE: 1998 mazda 626 check engine light flashing

Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. A technician will have to perform further testing to pinpoint cause and the proper repair. When the light starts flashing the computer is telling you to have the vehicle looked at now before other problems happen.

Gilbert Labont?

• 195 Answers
• Posted on Apr 01, 2009

SOURCE: 2000 mazda bogging in all gears especially in 1st and 2nd gears ?

Judging from what i know, the timing on the engine is probably a bit off, and i remember reading the exact same problem on another web site and that is also what they said. So just check the timing on the engine or have it checked by a mechanic if you don't know how to do it.

SOURCE: 2002 Mazda Protege acceleration problem

I had the same problem and found that the air admission tube was badly cracked.

Since this let air enter the engine downstream of the mass airflow sensor it is not measured so the engine ECU don't send the proper amount of fuel to provide the right air/fuel mixture. At higher RPM, the vacuum in the tube is enough to close the crack and hide the problem.

I temporarly repaired it with duct tape until I get the part.

Stephane

SOURCE: Check engine light intermittently flashing, car jerking.

Could be fuel or electrical related. Since you may not know the history, this may take a while.
Any amount of smoke from exhaust? White, Blue, Black?
Start with most obvious and inexpensive:
1. Fuel filer clogged (replace fuel filter).
2. Could be the ECM (Electronic Control Module). It controls the ignition spark timing.
A few other things... consider other expert solutions...