Your idle sounds normal aside from the surging. Have you tried unplugging your MAF?

 

Yeah I unplugged it and still happened. Also the MAF was replaced about 20,000 miles ago. The idle is also rough but doesn't act up when I use throttle but shakes the car a little when is in idle.

 

Hey I was reading up online and it said if you unplug the MAF while running and dies it means its bad? Is this true then this did happen. Also I rechecked the receipts the previous owner gave me and the MAP sensor was replaced 20,000 miles ago not the MAF sensor.

 

I usually discourage people from unplugging sensors while the car is running. If you have the MAF unplugged it forces the car to run in open loop mode. This ignores any signals from the O2 sensors, coolant temp, MAF etc. The mixture is only determined by the MAP and the preset fuel tables from the factory. If you still experience the surging when the MAF is unplugged it has nothing to do with the O2 sensors or MAF. Check the fuel pressure at the rail, change the fuel filter, plugs and wires.

 

oh ok thanks I'll remember that. Well I looked at the MAP sensor and it looked a little rough so I went to the store and bought another one even though it was replaced 20,000 miles ago. I ran the car to get it hot and no surge. It's raining here so I'll try to drive it tomorrow and see what happens. Hope this is it! lol

 

The MAP shouldn't matter when the car is successfully running in closed loop mode, the car ignores any signal from it. If you replaced it and something changed in normal running conditions (i.e. all sensors plugged in) I'd say you not only had a MAP issue, but potentially something else as well. Any SES light?

 

I read online at shoebox's site:

"Something else to consider, is that when the engine gets to ~220º (even before the stock fan ON temp of~226º) and you are at MAP loads of 70Kpa or more, the PCM begins to retard the timing."

Around 220º degreesis when this issueoccurs. So I figured something has to be happening to the engine at this point, so I thought I would try the MAP sensor first then see what happens. My interpretation of what is said above is that when the MAP sensor reaches a certain pressure the PCM starts to retard the timing. So if the right signals aren't getting sent to the PCM from the MAP sensor then this could cause my issue. Again this is my interpretation so don't ream me out guys lol. Plus this issue may not be over yet

 

Well it keeps on coming. I have a new symptom lol. Well I took the car out and when I try to go above 1500 rpm the car bogs down and really doesn't go anywhere. I turned the car of and it was hard to start and pretty much almost dies at idle. Plugs and wires were replaced less than 10k miles ago. Pretty sure it's the opti yay. Also not sure the opti has EVER been replaced.

 

Wow nevermind lmao. The f***ing gas gauge is wrong. Car had no gas

 

lol my last one ran out at 1/8th tank. ran out twice before i caught on. man thats an expensive repair. tank of gas is almost 50 bucks.