Thanks in advance for any help! I'm new here but I've been tinkering on my own vehicles for quite a while now but I'm not real comfortable with the 'newer' stuff that has all of those electronic gizwhatzits. Like the title says, I've got a '94 GMC half ton truck, 2WD, 5.7L engine, 173K miles Often (but not always) when I start the engine it will run rough and act like it wants to die - increasing the throttle a bit helps it stay running. On really hot days this summer the engine might die several times before it stays running. Now that the weather is cooler it just idles rough sometimes. Acceleration from a stop is very poor. The engine hesitates and sort of coughs causing the truck to lurch and doesn't run smoothly but at higher rpm it seems to run well. I've done a little digging on these forums and found an entire laundry list of what might be the problem. I guess first I'll check out that TPS and make sure it is working correctly. I was going to install new spark plugs and wires but it seems that might not even be part of the problem. Any suggestion would be greatly appreciated. Thanks!!