I have a '94 Honda EX VTEC 175K miles with 4sp automatic transmission

It runs rough between 2700 and 3000 RPM. By rough, I mean It vibrates or shakes.

• This only happens when transmission is in gear (doesn't happen when transmission is in neutral)
• This only happens under moderate acceleration (doesn't happen under full acceleration)
• The symptoms get worse as engine temperatures rise.
• The vibration can be felt through the seat, not through the steering wheel
• The transmission has been checked by a professional since after the symptoms began
• Both front axels have been replaced since symptoms began
• Spark plugs and wires have 30K on them
• Recently, it has started running rough at 2000 RPM, too

All four injectors register 1.0 Ohm resistance. Haynes says resistance should be between approximately 1.5 and 2.5 ohms. I have also read that the exact resistance is not as important as the fact that all four have a similar figure.

Your thoughts will be appreciated

 

I've moved this to General Tech - please do not post questions in the DIY section.

Sounds like the EGR ports (ports not the valve) are clogged. There is a how to in the stocky at the top of this section.

 

This has similar symptoms to my 94EX long running problem w/ vibration under acceleration. I replaced both axles twice w/ AZ aftermarket axles. Symptoms remained same. After 2nd AZ axles, I purchased Raxles replacements and solved problem.

Also suggest inspecting motor mounts for damage. It is possible that motor mount damage could cause these symptoms.

good luck

 

What are AZ axles? Raxles?

What should I look for on the axles besides defective boots and excess play?

 

AZ= AutoZone
Raxles= Brand/company that sells cv shafts

TX is with the cv shafts. I'm with an egr port issue.