I just bought an 87' gmc s15 truck with the 2.8L v6 throttle body injected motor with only 30k miles on it. I was driving it fine for about 3 days and just yesterday it started giving me trouble. It starts and idles fine but when you go to drive it starts to lose power and eventually shuts off. The catalyic converter is running really hot and I tried to take it out last night to "fix" that issue but its rusted to the pipe. I'm starting to think the cat isn't all the problem since the car idles fine until you try to drive it. The thing is throttle body injected something I know very little about but it seems like a possible fuel starvation problem any help would be appreciated. Thnx -Rob-

 

sounds to me like your coverter is clogged up. when its cold does it run ok? you either need to replace the converter or remove it. removing it will make you fail inspection though. cut it off and drive down the road and see how it runs.yes it will be very loud.....but im sure that it will run fine though. what happened to the old motor?

 

where in yorktown are you located?


i have some free time later today to help

 

Thnx for the info guys. I actually think the gas in the tank had been sitting too long b/c I drained it and put some 93 octane and some booster in there and it seems to run ok now. I took it to my friends shop to get the fuel system cleaned out and he should know something for sure today. I'm gonna see if he can pull the cat for me so I can make sure that doesn't become on issue or just in case it was the issue. Thnx again I'll keep you posted if the problem persists.