I have the same problem. I believe the idle air control valve either needs to be cleaned or replaced.
When a 1999 S10 is sluggish and surging with going up hills, perhaps there is a problem with the transmission. The filter might need to be changed, more fluid added, or it might need a complete overhaul.
I recently had this problem. I took it to my mechanic. First he said that there was nothing wrong because the diagnostics came back clean. I asked him to keep looking. He found that the overdrive mechanism was damaged and needed to be replaced.
Because it needs oil
A 1994 Cadillac Deville that has an engine surging problem and is stalling out can indicate it is not getting enough fuel. The fuel filter may be clogged.
No, surging doesn't rhyme with garden. The thing you need to look for with words that rhyme are the endings. These two words don't rhyme because the 'ing' on the end of surging doesn't rhyme with 'den' on the end of garden.
Get your accelerator pedal checked, I had surging problems for 6 months and Ford could not find the problem, they finally replaced the accelerator pedal and the problem went away. The throttle positioning sensor seems to wear out in the spot that it is used most around 1800 RPM
the water was surging over the rocks
Surging is usually due to a dirty fuel filter. Cutting out is also related to a dirty fuel filter or a fouled spark plug. Remove and clean or replace both components. Surging is NEVER a spark plug. The reason it's surging is because your main jet in the emulsion tube is clogged.
I found that a mechanic that used non Volvo transmission fluid caused this problem in my 2002. Once it was replaced with genuine Volvo transmission fluid it stopped surging.
The most common cause of surging is a dirty air filter. EPA approved carbs tend to run lean causing the surge condition described. Main jet needs to be replaced with next size larger.
The throttle body controls the amount of air going into the engine. The more air, the more rpms. If the throttle body gets defective and allows too much air into the engine, surging can occur. This surging can be dangerous because the vehicle lunges forward or backwards (depending on whether it is in a forward or backward gear) unexpectedly and without much warning (it occurs very quickly). There are many complaints on the internet about the "surging problem" with Ford vehicles, but Ford has not taken any action to safeguard the public by instituting a recall of the affected models or by notifying the owners of the affected models. It appears that Ford will not say anything about this dangerous condition until there is a fatality as a result of the "surging problem".