FAST XFI help... stopped running.

[anarchy99]

well, nobody was working at the fast tech line today apparently, since I kept getting a recording. The number listed on the website just kept ringing with no answer. I found the problem. It was the TPS sensor of all things. I finally got my computer to hook up to the ECU and noticed a TPS reading of 100% at idle and it was idling high. I unhooked the TPS sensor and it cranked right up and idled between 850 and 900 consistently. If the ECU sees a TPS reading of 80 or higher, it will fire the spark, but not fire the injectors, which is why my spark was good but my injectors wouldn't fire for some reason. I'll figure out the part number for the TPS sensor and go ahead and get another one installed. Other than that though, she is running good again, and I'm going to start logging and tuning. More to follow.

[camcojb]

Originally Posted by anarchy99

well, nobody was working at the fast tech line today apparently, since I kept getting a recording. The number listed on the website just kept ringing with no answer. I found the problem. It was the TPS sensor of all things. I finally got my computer to hook up to the ECU and noticed a TPS reading of 100% at idle and it was idling high. I unhooked the TPS sensor and it cranked right up and idled between 850 and 900 consistently. If the ECU sees a TPS reading of 80 or higher, it will fire the spark, but not fire the injectors, which is why my spark was good but my injectors wouldn't fire for some reason. I'll figure out the part number for the TPS sensor and go ahead and get another one installed. Other than that though, she is running good again, and I'm going to start logging and tuning. More to follow.

makes sense. If the TPS is 100% when cranking the ECU goes into clear mode and will not pulse the injectors. This is to help start a flooded car. Glad you got it figured out.

Jody