acmoc

Hi guys merry xmas
1991 crx si d16a6

Yesterday my car started to stumble at @ 65 mph
Like gas was being cut.
But would go away.


It drives fine and such at low speed for the most part.

And it does it only once warm, starts fine every time


I checked the spark plugs, and put new V powers in (gap .044)


I checked fuel psi and it was low, so I put a new fuel filter, psi jumped back up to 45 psi. So I figured that the fuel filter was clogged.
Well it stumbled again once it warmed up, and it threw an O2 sensor cel.

I had a new spare lying around so I put it in and so far it's been good.

Could this have been just a bad O2 sensor causing the problems?
It was in only about 1-2 years (bosch)

What should I expect if it returns?

Bad fuel pump
TPS sensor?
Slipping clutch?
ECU temp sensor?
Vacuum leak?



Also checked the dizzy cap and rotor, both fine
dizzy is new.

Lee McHale

probably just the o2 sensor. Are you running aftermarket header?

bheinen74

TPS

acmoc

I have dc sports header
I cleaned the air temp sensor and map sensor with a little carb cleaner.
And put a fresh tank of 91 octane gas from Shell
Hasn't done it since.

I was a bit suspicious of the costco gas

White_EG1

What brand 02 did you put back in?


Thru my years, Bosch's 02 does not seem to work very well with hondas. I recommend Denso.

acmoc

I had bosch, and the reason I had a new spare was because I had to return another bosch.
Before that, a bosch O2 causedme to fail emmisions.(It was failing but would not throw a cel)

Yes, I read that bosch o2's are garbage.
I will get a denso next time.