The current condition is no change! Still the same rough running engine.


I have no error codes. I've installed a new CPS, new fuel filter, new O2 sensor and cleaned original Bosch injectors (though probably not enough, they all spray solid and fairly equal streams now). I've swapped out my AMM (MAF) for my known good backup and there was no change. I've swapped out my ECU for my known good backup and no change. My plug wires are NGK and have 20k on them, they all test 310 ohms each. The cap, rotor, and plugs were also replaced then. I replaced the timing belt with a Continental belt 2k miles ago, and readjusted the tension approximately 200 miles afterward. I replaced the intake gasket with a thick OEM 2k miles ago. The ECT moves through the heat range per Art's very nice chart. Compression tests 150+psi across all. I've gone through the hoses and most are new or past couple years, low miles. There's actually pretty good vacuum considering how rough it's running.

I found a set of new injectors that will be arriving tomorrow. If that doesn't fix it, I'm totally stumped and ready to convert to EV. A little joke, but also serious once it's practical to do so.

Any ideas to what I'm missing? Thanks so much to everyone who've shared their thoughts and great experience!