Engine miss could be leaking egr valve gasket.clogged fuel injectors.weak coil. low cylinder compression.
You may have an intake gasket leak involving these two cylinders. Over time the gaskets will tend to harden up and not seal properly. You can try spraying intake cleaner in the area and see if the miss clears up. I have also used soapy water and spray it in the area. Be sure that it is spray and not a stream or water, and make sure it has a lot of suds with minimal water.
i replaced the intake gasket :P
Ok, then I suspect this issue is fuel related, and the timing belt is dead on spec.
i replaced the timing belt and the balancing belt too ;) maybe fuel, i just build a fuel pressure gauge, im gonna test it tomorrow and see if the pressure drop when the trouble occur ;)
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Fast idle control may need adjustment along with the IAC, however I think it unlikely that this would the cause of misfire. You mention cleaning the EGR, did you clean the EGR passages in the inlet manifold too? On Hondas the exhaust from the EGR is fed into each inlet runner by individual passageways. Over the years these become blocked but not all at the same time. Those that become blocked first cause their respective cylinders to run lean whilst the remainder run richer. This imbalance in fuel mix between cylinders leads to misfire. Eventually all the passageways become blocked and the misfire disappears as all cylinders run without exhaust gas introduction. It was around 94 that Honda introduced an inlet manifold with an access panel on the inlet manifold specifically for the task of cleaning the EGR Passageways. The earlier manifold had metal plugs that had to be removed to permit access which then had to be replaced with new ones once the cleaning procedure was completed. When all passageways are clear this possible source of misfire will be cured.
If all else fails and u still have issues try replacing your timing chain.
Sounds like a dirty Throttle Body and dirty IAC (Idle Air Compensator) valve. Get some good Throttle Body cleaner remove the
flexible hose at the Throttle Body spray it and wipe it very very clean
an old tooth brush works good for getting in there.
Now remove the IAC
from the side of the throttle body, careful with the gasket if you want
to reuse it. Spray it down good inside moving the valve back and forth
as you do let it soak for a few minutes and clean it again. Blow it out
with some compressed air and reinstall it. Put some throttle
body/injector cleaner in the fuel tank.
Keep us updated.
A check on the spark plugs of the 2nd and 3rd cylinder must tell the story. If you see there is a dirty plug, oil soaked or badly burnt we need to check on the firing and fuel delivery.
First of all check for compression if there is oil smearing, it can be due to weak oil rings or compression rings or a faulty bore in case the engine has clocked a great deal.
Also check the valve settings before the firing - spark intensity of the 2nd and 3rd plugs are confiremed. Check the HT wires to the plugs as you have checked the remaining sections. I hope this must give an indication of the lurking fault.
Here are the most common causes of idle surge, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake
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I changed the timing belt and the balancer belt, and i timed it too
I changed the intake gasket too
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