HKStreetRaceRx7

iTrader: (3)

I took my rx7 out one night just because I hadn't drove it in a while..I let it warm up and everything like normal and then I was going through a curve at 45 mph then stepped on it about 3/4 throttle and heard a stutter noise. When I stopped at the next stop sign the idle started jumping up and down and the car felt like it wanted to stall out. I got back to my house and the idle was jumping from about 300 rpm to 1300 rpm and the engine was vibrating really bad. I checked for any obvious vacuum lines off and I can't find any, of course it was at night using a light only and I checked the ecu for error codes and it gave me 13 for the the pressure sensor. I tried reseting the ecu and adjusting the idle but it didnt change anything. Thanks for any advice or suggestions you can give me.

chagar

If I had to guess it is a leak in the LIM. I had this problem many years ago and replacement took care of the idle surges.

Gadd

Check the connection to the MAP sensor. It's a little black box on the driver side firewall, it says "sensor-boost" on it. Check to make sure the vacuum line on the bottom is connected, remove the electrical connector hit it with some dielectric grease and reconnect. Reset the ECU.

HKStreetRaceRx7

iTrader: (3)

Thanks..I checked the vacuum line to the MAP sensor before because it happened to me before and it is still connected..I bought a new MAP sensor a week ago and I just got it today so I'll be putting it on tomorrow...I forgot to mention that on top of the bad lumpy idle that when I press the gas pedal down it takes about 3 seconds before the engine start to rev at all...and when you said lower intake manifold do you mean a gasket? and would that cause the pressure sensor error code? Thanks for any help guys, I know I've seen a lot of posts about people having the same kind of problems, but they never usually end up saying what was wrong or how they fixed it.

chagar

Sorry, yes I meant the gasket. I do not know if that would cause the error code.