92g92

I'm on my phone right now so I'm going to try to keep this as short and informative as possible. Thank you so much in advance, I have a read a thousand similar threads but nothing has helped so far.
1. Under medium to heavy throttle, car misses and sputters, won't rev past 3000
2. Tachometer was jumping around, replaced ignition coil, then this problem began. Threw away old coil. Warranty on new coil, replaced it again, problem persists. Car ran fine before first replacing the coil besides a tendency to surge and die at stoplights from time to time. Possibly related?
3. Replaced coil twice, replaced ICM, replaced fuel filter and sea foamed the heck out of the gas tank with new gas and poured it in through the brake booster line as well. Now it runs MUCH better, responds in the lower rpm range and from a stop with almost no shaking or feeling of a miss. Car originally shook horribly when moving from a stop.
4. No dead spots in spark plug wires, new plugs, no cut wires, new TPS sensor and connector. I'm thinking maybe a bad or clogged injector, but any idea why everything went to **** when I replaced coil? The tachometer still jumps around as well. Btw, I have no cats or EGR, running a Holley Stealth Ram. Under heavy throttle, it misses, sputters, shakes slightly, but SOMETIMES for a few BRIEF seconds, fires perfectly and revs just a tiny bit more. Please help me.

Zane M

iTrader: (1)

These cars are notorious for the tach going bad. If you are handy with electronics there are threads on how to repair them, or you can obviously get it repaired by someone else or replace with a good one.

I would check the resistance on the injectors. It won't tell you if one or more is clogged, but it will tell you if one or more is not working right. If these are original injectors, I can almost guarantee one or more is bad.
If you determine you have injector issues, replace them all. Southbay fuel injectors have great injectors at really nice pricing.

92g92

Alright cool thank you for the input. It seems like injectors is the only option at this point. Guess I'll drip test them and resistance test them all.

92g92

Cleaned and ohmed the injectors, they are good. Still misfires. Throws a code 43 sometimes, don't know if this is caused by the miss or maybe THE cause. Any ideas?