brian76708 Posted February 4, 2015 Report Posted February 4, 2015 For a while now i have had a surging problem with my grand prix (usually around 17-2400 rpms while under load like going up a hill) and i just chose to ignore it. Until it started to stall out randomly the other night. So far i have change the Coil packs, ignition module, crank position sensor, camshaft position sensor and i am still having the same issues. I finally got a better scan tool and was able to read a Camshaft position sensor fault and while watching the live data stream i noticed the RPMs on the sensor would jump all over the place while at a consistent rpm. Even after i changed the sensor the same problem remained. So I am starting to think it might be the wiring from the Camshaft sensor to the PCM. Was wondering if anyone else had any other ideas? thank you for your time. Quote
primergray Posted February 4, 2015 Report Posted February 4, 2015 Could be that the magnet fell off the camshaft gear...but good idea to check the wiring first. The terminal on the PCM could be corroded. Quote
pitzel Posted February 5, 2015 Report Posted February 5, 2015 I know this might sound dumb, but have you removed all 6 plugs and inspected them? Quote
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