Hi everyone....
I'm have a few problems....
First of all I occasionally get a very high (up to 2300 rpm) idle... and sometimes very low (like when I decelerate, even if the car is in neutral it wants to stall). When the car idles high, I heard this weird high pitched sucking sound. I'm thinking it's the ISC valve. We've cleaned it out and put it back on, so that didn't fix it. Should I try to get a new one? Any other idea what it could be?
Second of all, I'm getting fouled plugs every 1000 miles or so, even on iridium/platinum plugs. It's driving me crazy, since I can't afford to replace plugs every 1000 miles. The car runs worse and worse, missing, stumbling, having a very rough time starting, etc, until the car is basically inoperable and I have to replace the plugs again, then it fires up and drives fine until I have the same problem again.
Are these 2 problems related? Any idea what could be causing the weird idle and the rapid fouling of spark plugs???
I have a custom FFIM with a large throttle body with a flange for the stock ISC valve... I make about 450-500hp, running 550 injectors, using AEM EMS. I also have a wideband and the car drives right around 14-15 A/F ratio most of the time, only goes below 11 under high boost.
Any help would be appreciated!!!!!!!!!!!
I'm have a few problems....
First of all I occasionally get a very high (up to 2300 rpm) idle... and sometimes very low (like when I decelerate, even if the car is in neutral it wants to stall). When the car idles high, I heard this weird high pitched sucking sound. I'm thinking it's the ISC valve. We've cleaned it out and put it back on, so that didn't fix it. Should I try to get a new one? Any other idea what it could be?
Second of all, I'm getting fouled plugs every 1000 miles or so, even on iridium/platinum plugs. It's driving me crazy, since I can't afford to replace plugs every 1000 miles. The car runs worse and worse, missing, stumbling, having a very rough time starting, etc, until the car is basically inoperable and I have to replace the plugs again, then it fires up and drives fine until I have the same problem again.
Are these 2 problems related? Any idea what could be causing the weird idle and the rapid fouling of spark plugs???
I have a custom FFIM with a large throttle body with a flange for the stock ISC valve... I make about 450-500hp, running 550 injectors, using AEM EMS. I also have a wideband and the car drives right around 14-15 A/F ratio most of the time, only goes below 11 under high boost.
Any help would be appreciated!!!!!!!!!!!
