2000 Sonata - slight lurch

I have a 2000 Sonata 4 cylinder model and I've noticed in the last week or so that there is a very slight, almost imperceptible lurch when driving along around 50-55 kilometers per hour (I'm Canadian so I don't
use miles in my lingo).
The lurch isn't when its shifting gears, just driving along. As I mentioned its so slight and it happens so quick that I don't even have time to glance down at my guages but I don't notice the rpms or speed changing in these small lurches. I do have my air on all the time and I tried a couple of times with the air off and for those little experiments, it didn't happen.
Could the extra load of the air conditioning cause this or is it a coincidence? Or is this a symptom of a bigger problem. I hope Hyundaitech can help with this but all other opinions would be welcome.
Thanks
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Oh and by the way, I have no check engine lights on my dash come on at all, if that helps or matters.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
It's entirely possible that the a/c compressor is cycling on or off, causing the condition you describe. Play around with the a/c some more to try to determine whether that's the cause. At the appropriate speed, you may even be able to switch the a/c on/off and make the condition occur.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.