Mechanics

POOR ACCEL AND SMOKE

1994 Mazda b2300

Engine Performance problem
1994 Mazda b2300 4 cyl Two Wheel Drive Automatic 129000 miles

I have several problems going on but I think they are all related. 1) At stop lights/signs, truck runs rough/shakes. Sometimes I hold the gas pedal to increase the rpms, or I put it in neutral which helps a little. 2) If I leave the truck idling for a few minutes(in P or N), when I drive away there is a bunch of smoke. 3) My commute is only 5 miles everyday, but if I drive the truck longer where it can warm up, the engine pings/dings/knocks and smokes. It is worse when I put low octane gas. 4)I understand that the truck is a 4cyl, but it is slow to accel, sounds like it is bogged down. I thought these problems were attributable to the DPFE or EGR, but the truck seriously does not have one! I replaced the MAF sensor, which seemed to help a little. I also checked the airfilter and plugs/wires all fine. What else could it be? Thermostat, fuel pressure reg?
Avatar
Devbo
April 28, 2010.




Check out the related content below while we wait for the question to be answered by a professional mechanic.


AD