Have you been regularly running any type of injector cleaner through the fuel system. When my 93 3.3 gets rough a good does of a high quality injector cleaner usually clears it up. Sometimes it need to be run through a couple of tanks of gas.
My 93 Caravan (3.3Liter)idles rough and starts only with slight
> throttle after about 10 seconds of cranking. I've changed spark plugs
> and wires, air and fuel filters. I'm wondering if the spark is hot
> enough. How can I check? In the old days, I might have changed the
> coil, but this has no coil. Any suggestions appreciated. Thanks in > advance, ...Dave