horrible misfire issue

[ironman85]

see if number three is contributing still.

doesnt look like it. no change when i unplug any of the plug wires. im guessing that i fixed the cylinder 3 issue when i swapped the injector


i installed a remanufactured distributor this morning. no change. thank god i work at a parts house so i can return it. it was $190

my $12 timing gun is trash (big surprise there) so i cant check timing properly yet. guess i need to get a better gun and check timing right?

its been a while since i changed my fuel filter. but theres no way that a filter could cause this issue right in teh middle of driving, right?

[wed3k]

timing off by a couple degrees wont produce a misfire though. fuel problems are usually progressive.

when it misses, does the tach go in sync with the mis? this usually indicates an ignition misfire but not all the time.

at your parts store, they sell a spark tester. pop one of those on and check spark at each and every cylinder. it should be very rhythmic. recheck the spark plugs again, if it was runing really rich it may have fouled some plugs.

i say check the mechanical timing, its pretty easy and it isnt very intrusive (just need to take the top cover off)

[ironman85]

timing off by a couple degrees wont produce a misfire though. fuel problems are usually progressive.

when it misses, does the tach go in sync with the mis? this usually indicates an ignition misfire but not all the time.

at your parts store, they sell a spark tester. pop one of those on and check spark at each and every cylinder. it should be very rhythmic. recheck the spark plugs again, if it was runing really rich it may have fouled some plugs.

i say check the mechanical timing, its pretty easy and it isnt very intrusive (just need to take the top cover off)

yea, the tach is dropping and raising constantly.

just checked the timing on the flywheel and its way off. the circle(s) are not in view. i even advanced the timing light 99.9(whatever that actually means on this specific light) and still couldnt see the circle(s). it wouldnt let me retard the timing light. with the car in open loop mode that means a sensor is not affecting the timing and means the timing belt is just way off right?


is the spark tester called a diode or zoid tester or some shiz like that? weirdly named.


ive got brand new plugs in it. like only 3 days old.

and ive got the top timing cover off already from checking the timing belt. guess ill search up how to check mechanical timing now. unless u wanna give me a fast lesson on it

and thanks for your continued responses wed3k

[wed3k]

it doesnt meant he sensor is affecting timing, it means the o2 doesnt affect injector pulse width aka fuel.

i tihnk the timing belt may be off if you cant adjust the timing via distributor.

[batever]

Unsopported Theory/Wild Ass Guess: your crankshaft pulley outer ring separated or loosened from the inner ring when you accellerated, which affected the mechanical timing via the timing belt and resulted in instant bad running.

Checking mechanical timing just means making sure the camshaft pulleys and the crankshaft pulleys are aligned correctly, as in when you do a timing belt job.
There are marks on both sets of pulleys and they need to be spot on. If you pull the upper timing belt cover and take off the driver's side wheel you should be able to see the marks on both. Actually, you'll only be able to see the crankshaft accessory pulley without pulling the lower timing cover but there are marks on it so I think that will work.

In the absence of marks on the lower pulley, or if you are unable to see them for some reason, it is also possible to verify the timing belt alignment by using a dead stop in the number one spark plug hole to determine exact TDC for the #1 cylinder and then looking at the camshaft pulleys but if you want to know more about that method you can search for "dead stop" in my posts as I have posted fairly detailed instructions elsewhere.

[ironman85]

Unsopported Theory/Wild Ass Guess: your crankshaft pulley outer ring separated or loosened from the inner ring when you accellerated, which affected the mechanical timing via the timing belt and resulted in instant bad running.

.....i replaced my crank pulley 2 days before all this happened. it had worked its way loose. i rethreaded and cleaned the crank end best i could. globbed red threadlocker on a new crank pulley bolt and tightened it down.

[turbo90accord]

have you checked or verified that it is not your ECU? It is possible that one of the injector drivers in the ecu may be dead.