Car wont accelerate in gear 5speed manual with po420 code 99 accord

SOURCE: my car is jerking while accelerating and reaching certain RPM

I would look for a fault in the ignition system such as a cracked spark plug. Might need a scope check to put your finger on the problem

SOURCE: Speedometer stopped working while driving - no longer registers

This has happened on our van multiple times. Through some internet searches I have found a solution that works.

Go to your van and, with the ignition off, press and hold the trip reset button. You will see 'Sof' and perhaps some diagnostic test numbers will show up on odometer; the unit will perform a self-test, and the system will do a reset and should it should operate normally.

Cheers!

SOURCE: 92 Accord Automatic shifting

Has anyone change the transmission fluid and used anything other than Honda ATF-Z1. If so, have the fluid/filter changed in this car and use only Honda Fluid. This is the only fluid that you can use in a Honda. Even if you have used the correct fluid an fluid/filter change may help. If that is not the case then I suggest you seek out a trusted professional.

SOURCE: Have a 94 Honda accord Ex manual transmission

i have the same car and problem and yeah its exactly that your low on tranny fluid, of course you can always pull the dipstick in the tranny with the car shut off (what my Manuel says, usually its hot and running mine says engine off) chances are your gonna be a quart low

Tommy Thomas

• 430 Answers
• Posted on Jan 10, 2010

SOURCE: MY 91 HONDA ACCORD ACCELERATES AND DECELERATES BY ITSELF

sounds like a bad fuel sensor on the throttle body i had the same problem...u can find the throttle body with sensor at the junk yard for about $40... 30-45 min easy fix also replace the gasket....