I have a 94 Suburban that has 146k miles and it just began to break up under heavy acceleration at around 3k rpm. I installed a new cap & rotor, wires & plugs. Not sure what else to try but I need to pull a heavy boat next week and I want to get this resolved. Any suggestions would be appreciated.

Thanks,
Ron

Try a good fuel injector cleaner or goto your oil change place and let them do a high pressure fuel cleaner. Hope it helps