main relay replaced but still same sputter. My possibilities left IMO are fuel pump, fuel filter or foreign object in gas tank.
Symptoms are
1. Entire engine sputters but no backfiring and seemingly no misfiring. It is like someone just turned off fuel so it can only idle.
2. It still idles properly even when this is happening. I can just let off gas and it idles fine but will still sputter if i hit gas.
3. Symptoms range in time it does this. From a second or 2 to 10 to 15 seconds on occasion.
4. All other electrical components work fine while this is happening.
5. This has always happened driving at lower rpms between 1200 to 2700. Never yet has it sputtered above 2700.
6. If I cut off engine and restart all symptoms go away.
7. This happens no matter the engine temp.
8. Engine never sputters while revving up engine. It always happens while driving at low speeds and rpm's.
9. Engine never sputters above 35 mph. I also rarely go anywhere that speed limit is above 45. So am not sure how accurate this symptom is.
10. Symptoms have became more frequent over a month and about 140 miles of driving.


things ruled out and why?
1. Cat- Sputtering happens when engine is cold or warm and restarting car it immediately goes away.
2. o2 sensor- no cel. O2 sensor is new and this started with old O2 sensor replaced a few weeks ago.
3. Main relay- Was replaced today.

other possibilities?
1.something else in dizzy besides ICM which was replaced a couple days ago(I had a spare i put in).

Any other possibilities please share.

 

Anyone Anyone?

 

fuel filter, ICM and main relay replaced but still sputters with same symptoms as above. Anyone have an ideal?

 

You could maybe have a failing tps, fuel pressure regulator, very dirty egr/ports, bad electrical somewhere ie. A motor or body ground, i do not know what kind of car you have or motor, nor does anyone else

 

Sorry it is a 92 accord coupe 5 speed. Fuel pressure is good as i have an in dash fuel pressure gauge. EGR is good. Was cleaned recently and intake cleaned also. No bad grounds. All been checked. TPS is definitely on my list. The real question is what would cause sputtering while under load at lower rpm's while gas press deeply pressed and not in neutral. It seems to occur randomly and i can't bring it on at will.