[fluffyboxerfan]

Hi, just had a problem with my 2005 GV. It has been running fine since I bought it a few months ago, then all of a sudden started running rough. the next day would fire up, but not idle and stall out, I finally got it to run properly and it seemed ran fine, but with the check engine light on constantly. Any ideas as where to start to look for this issue? thanks for an help. Bill

[Gwagensteve]

Google how to put the CEL into diagnostic mode and find out what code(s) it's throwing. That's where to start.

[fluffyboxerfan]

googled it, there actually is such a process to do read the codes, without having a code reader. Will see if I can do it.

[Gwagensteve]

User name is on the left. Hillbilly2 is just somebody we used to know.

I wasn't being facetious. You could spend more than the car is worth trying to replace everything that could be causing the problem, like people used to do with carby cars, or you could jump the diagnostic plug with a paper clip, read the trouble codes, and start from there. You don't need a scanner. You will need a copy of the FSM to interpret the flashes from the CEL and to know which pins to jump of the diagnostic connector, but you'll need a copy of the FSM to do any real work on the car anyway.

As for the actual mechanical cause, it could be almost any thing - cam/crank position sensor, IAT sensor, MAP sensor, Coolant temp sensor, fuel pump, fuel pressure regulator, faulty IAC valve, faulty throttle position sensor. coil packs, ECU..... I think there's some value in getting the computer to tell you where it thinks the problem is rather than go though the process of elimination.

[30ONA]

Steve, some of the later models don't have the plug for jumping the codes. Mine is the same.

Bill supercheap auto can read the codes for $30.