.accelaration prob

1993 MAZDA B2300
139,000 MILES • 4 CYL • 2WD • MANUAL
Avatar
TONYCAM
  • MEMBER
  • 8 POSTS
1993 mazda b2300 p/u with a 4 cyl the engine starts up idles fine but when you put it in first gear and step-on the peddle it wont accelarate properly like when the peddle is stomped to the ground it just bogs down and does'nt pic up speed what could it be ?,, ( tps, idle valve,maf?) this might help< when the engine is in neutral and i manually apply the throttle at the throttle body (hold open) then the engine rpm go up and down, up and down with the throttle held in one posistion say 3/4 open..4 cyl engine with plugs on both sides, two coils
Dec 22, 2010 at 6:04 AM
Advertisement
Avatar
KHLOW2008
  • ✓ASE Certified Mechanic
  • 41,814 POSTS
  • ASE Certified Mechanic
Check the fuel pressure and MAF. These are the most likely fault. Check for vacuum leeakages between MAF and throttle body.

Have you tried to retrieve for trouble codes?
Dec 26, 2010 at 11:13 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.