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Originally Posted by danmalv
I have a 2003 H2 and was driving last week when the vehicle just died at 65 MPH. I got pulled off the highway and the rig won't restart, rather, it would sputter and die again. Prior to this incident, I had my oil changed and the engine light was on and the mechanic did a dio on the computer and it indicated an issue with both 02 sensors before and after the catalytic converter (Totaling 4) and an EVAP Solenoid needed to be replaced. Now, I have a dead rig and can not figure out what happened or what it might be?? I ordered a new EVAP Solenoid and I am going to replace that, can that cause the rig to do what it did? I have been trying to start it every day it has been sitting and it will start for about 3 sec and then die again. The car will not start and continue to run, any suggestions or answers here guys?? I am at a loss and can't get it into a shop because of my distance from town. Do you think it may be the sensors instead of the solenoid? Also, I am not sure where the solenoid is located and I do not have a repair manual to go by?? Anyway, I could really use some input here, thanks!!
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You have a fuel problem. To me it sounds like you are running lean. That may be why when you plugged into the computer that it said all 02 sensors are bad. The car will still drive OK, but you will lose mpg withg bad senors. Somewhere in the fuel system you are not getting enough fuel. could be fuel filter, injectors, both right and left banks could be running lean from fouled plugs possibly.
But o2 senors go bad for a reason most of the time, unless they get damaged, and all 4 of them is highly unlikley. All they do is monitor the amount of fuel coming into the exhaust and tell the fuel sytem to send more or less fuel to keep the cats from overheating. Pull one of the o2 sensors out and see if it is really white on the tip, if so you are running lean.
if you know a good dyno tuner that could plug into the computer i would. don't let just some local shop or dealer work on it. Have the them tune out the rear o2 sensors. It will not hurt the car and it will save you Trouble down the road. Plus with the tune you will get some more hp.
I had the same type of problem with my GTO. I had my tuner look at it and it was fouled up plugs and 1 bad o2 sensor causing my left bank to run lean, causing the car to hesitate and die.
If you have any questions pm me and i'll give the number for the shop that does all my engine work on my cars. They can walk u through it maybe.
hope this helps!