Did I hurt my engine?

[TwoFoutyEsEx]

I recently washed and cleaned my engine and It sat for about a month. I drove my car today (97 240sx) and It felt choppy, It would randomly clear up but by the end of my drive it was always choppy I ran the codes on the ECU and found code 65 (cylinder 4 misfire). Popped the hood checked connections and stared down to the spark plug and saw some water, im guessing from my engine wash down. I blew the water out and It ran good.

Anyway, I was misfiring for about 15 miles in the 4th cylinder.Did I hurt my engine in anyway?

[xX RB Xx]

no.

go 80 on the high way in 3rd and throw it into 2nd..

that will hurt your engine.

[AZ89two4Tsx]

go 80 on the high way in 3rd and throw it into 2nd..

that will hurt your engine.

This man speaks the truth. That is indeed, not good for your engine.

[xX RB Xx]

This man speaks the truth. That is indeed, not good for your engine.

yeah ive had bad experiences.

[TwoFoutyEsEx]

good thing you cleared that up I do that all the time But what happens to all that unburnt fuel in the misfiring cylinder???

[AZ89two4Tsx]

When it fires it burns off? What else would it do?

[xX RB Xx]

it would plot against the spark plug into fouling out.

[240dx]

yeah.. but what about when the cylinder doesnt fire?

[xX RB Xx]

its just gas going into the cylinder. nothing is going to happen. and then when it refires its going to burn it off, and probably foul out the plug because of the excess amount of fuel.

[Chris28]

I know some guy that shifted from 5th to 2nd. Why he even had the notion to downshift at 90 mph is beyond me. Needless to say he no longer has a clutch or a head gasket.

[xX RB Xx]

i wonder what that sounded like.

i remember what it was like going from the top of 3rd to 2nd.

[PJ.]

I went from 2nd to 1st at 8000rpm instead of 3rd and busted a crown and pinion...Dog box will just take any gear like butter

[str33tprintz]

I went from 2nd to 1st at 8000rpm instead of 3rd and busted a crown and pinion...Dog box will just take any gear like butter

That was probably a fun loud ride

[nissanman04]

The unburned fuel just goes out the exhaust...

[DrifterXRPS13]

I used to shift from 5th to 2nd in my old s13 just to say i could chirp in second...lol...so much hp in that puppy, hahahaa....

[zerodameaon]

dont worry to much about the water. you found the problem before to much could happen. just put a plastic bag over your electronics in the future. lesson learnd in my case.

[Warped161]

I have done the dreaded 5th to 2nd downshift. I missed 3rd and turned the headgasket to poo, thats how i blew the first engine. It was loud for a whole 5 seconds then, very very quiet as i coasted for about a mile and parked it in front of a aid auto. Missed shifts suck.

[DrifterXRPS13]

These weren't missed shifts..hehe...

[blacksrjdm]

Aww man engine is done. Wanna sell me the long block cheap????

Worth a try anyway.

[DrifterXRPS13]

dude, s13 is long dead...the only reason i was doing that was to see how much of a beating that motor could take before it died...it never did....it had valve ticking, chain rattle, oil/coolant mixing...it was great...crap would break, i would replace it, but it would never go boom.

[hbpignosePA]

i honestly dont know how you all downshift from 5-2nd if your not on the track

i just kick it to neutral and use the brakes

i figure its less wear on the clutch

[Warped161]

well if you cruising at 55 and want to move fast you aim for 3rd, but we missed.

[OutToWinPAHC]

I would replace that spark plug. Fuel could have pooled, then randomly ignited due to manifold heat and the plug could be fouled some.