1994 Honda Accord 4 door v6 rough idle and take offs

spark problem first, followed by IAC replacement,

check out the idle air control valve and the passages

• does the engine miss? bumps is a rythmic pattern?
• an engine miss will appear to diminish at higher rpm due to centrifical force.
• other possible problem broken or flat motor mount.
• is the idle rough in reverse?
• if not
• open hood
• start engine
• Left foot on brake (hard)
• start engine
• watch engine as you select drive
• still holding brake with left foot / throttle gas with right foot
• does engine dramatically move?
• if so replace motor mount on offending side
• if not possible engine miss or transmission problems

egr could verywell be the problem leaks after warmup

You got it... most likely the head gasket...

Other symptoms:
1. White smoke out the tailpipe and excessive water dripping out of it.
2. With radiator cap OFF and car running, there will be frequent bursts of steam and water (careful! it may be violent).
3. Oil dipstick will have a "milky" goo ... that's water mixed with oil.
4. Overheating can be alleviated in an emergency by running with a "loosened" radiator cap.

Check cylinder compression to confirm that two adjacent cylinders have low, and nearly the same pressure. That confirms blown head gasket.

Hope this helps!

Possible injector failure. locate by disconnecting injectors one at a time. The one that makes no change is the questionable. Status of spark plugs need chkg also. pull the plugs an the one that looks washed is questionable good luck

Seem like you need to have at-least the two front tires high speed balanced. This shaking at high speed is most likely due to the tire being out of balanced. Good luck and thanks for using FIX YA

looks u up for a new head soon,,,,,if u leave it to long possible new motor

Not saying this for sure, but I had the same problem, and i have a 1994 xr7 V6 3.8 L , and all u need to do is set the idle down manually because your computer could have seen that the injector was stuck open, and tried to turn up idle to keep up with the amount of fuel being pumped, worth a shot :P

it is normal for your car to idle down when the ac pump cuts in just have your timing checked and adjust your idle as necessary at about 750 rps at normal idle with ac off also just make sure they havent overtightened the ac belt and pulley.