gets decent mileage and it always starts hard - have never checked the codes ever - don't know where to look, probably need to take it in to get checked. Runs rough when the light comes on only at idle. Other than that its fine. I have been told its the coil and numerous other things like the camshaft and crankshaft sensors. I was jsut going to start replacing them all but figured I would ask.
brand new fuel pump
where is the coolant temp sensor located?
Sometimes aftermarket pumps can have problems so I would still moniter fuel pressure if good then replace the coolan temp sensor which is a common problem. Let me know if you have questions or how it turns out. Thanks.
Here is a picture of sensor.
ANd my coolant temperature guage has been showing for about a year that the coolant never gets above 125-140 degrees - which I knew was wrong.
I will go get a new sensor tomorrow.
Are they hard to change? Any special tools?
The coolant temp sensor for guage and computer are two seperate sensors, they are easy to change. IF temp sensor still never goes above 140 replace the thermostat also. The sender is for guage and sensor is for computer. Let me know how it goes or if you have questions, thanks.
OK, change thermostat, engine coolant sensor and sensor for the guage, new plugs and high performance wires. Everything was great, it ran with more power, everything was perfect until I drove it 1 hour in about 100 degree temperatures, and on my way home the engine light lit up - it still runs great, but that damn light is on again. What would be the next thing to do? What is the next common issue for vortec's like this one?
P0304 bad cylinder #4 - its running beautuful right now, no miss, plenty of power the check engine light is off. I was going to look at changing the coil, new plugs and wires and maybe the injector is bad or maybe the oxygen sensor or it could be a burnt valve. I am looking for your experise here.
ALso have a P1870 which I believe is due to some bad parts in the transmission and I sometimes have hard shifts when its hot.