1999 Tahoe

[jcooley]

Originally Posted by kaskillah

I have a 99 Tahoe and the "service engine light" came on. I have the factory service manuals (4 books in the set each about the size of an LA phone book) for this SUV but it looks like you have to be a scientist to use them. According to the manuals you need a scan tool to pull up the DTC's so it will tell me what the reason for the check engine light coming on. I don't have one of these tools and I don't feel like shelling out the bucks to buy one nor do I want to take it to the numbskulls at the local dealership. The SUV runs fine but the light is annoying. How do you cancel the light other than pulling out the bulb? Disconnecting the battery did nothing.:shocked

My 99 Tahoe was doing the same thing. Try turning the gas cap until it gets tight and clicks five or six times. My engine light stayed on for weeks before I decided to take it in. I was going on a long trip and just wanted to make sure. They hooked up the machine, told me what it was, tightened the cap till it clicked several times, and it hasn't been back on since. Jason

[jcooley]

You seem to know more than the average bear so I'm asking for your advice on my Tahoe 99 4-door. It has no acceleration unless you just put it to the floor and then it's 1,2,3, zooommmm. There is such a delay there you could actually punch it and tell everybody to put there seatbelts on before it kicked in. I've had the following put on.

New Fuel Filter
New Fuel Pump(went out, had no choice)
New Plugs, Wires
Transmission Checked(Mr. Transmission said it was fine.)
Catalytic Converter Checked(Local Muffler Shop said it was fine.)

There is also a clinking noise when going uphill or motor is in strain.
It seems to ride a lil better with high octane gas, but what doesn't ride better. Any idea as to what I could try next.
I thought that maybe the valves need cleaning, but I was told that it being a 99 that wasn't likely the problem. Thanks. Jason

[Flat Broke]

Originally Posted by jcooley

You seem to know more than the average bear so I'm asking for your advice on my Tahoe 99 4-door. It has no acceleration unless you just put it to the floor and then it's 1,2,3, zooommmm. There is such a delay there you could actually punch it and tell everybody to put there seatbelts on before it kicked in. I've had the following put on.

New Fuel Filter
New Fuel Pump(went out, had no choice)
New Plugs, Wires
Transmission Checked(Mr. Transmission said it was fine.)
Catalytic Converter Checked(Local Muffler Shop said it was fine.)

There is also a clinking noise when going uphill or motor is in strain.
It seems to ride a lil better with high octane gas, but what doesn't ride better. Any idea as to what I could try next.
I thought that maybe the valves need cleaning, but I was told that it being a 99 that wasn't likely the problem. Thanks. Jason

Is your check engine light on while all of this is happening? My guess ( and it's just a guess) is that the noise you here is a pre-ignition ping. If that is the case, perhaps the engine's knock sensor triggers the ECU to pull timing out thus killing your power. So then the question would be why you are hearing the noise in the first place. Have you hooked a scanner up to see if any error codes have been logged?

Chris

[jcooley]

Originally Posted by Flat Broke

Is your check engine light on while all of this is happening? My guess ( and it's just a guess) is that the noise you here is a pre-ignition ping. If that is the case, perhaps the engine's knock sensor triggers the ECU to pull timing out thus killing your power. So then the question would be why you are hearing the noise in the first place. Have you hooked a scanner up to see if any error codes have been logged?

Chris

I finally took it in to the chevy dealership. Nothing came back on the computer, but they said there was carbon buildup and that the injectors needed cleaning badly. Anyway, $642 dollars later, it's running much better with no tinging when you accelerate. The only thing is now, I think they messed up my speedometer. I can come to almost a complete stop and it still reads 10. Also when driving 70 by the speedometer on the interstate, I get blown off the road. So I'm thinking it's about 10 mph over what it should be.