i have a 94 accord lx automatic with 180000 miles
when i first start driving the car after about 10 sec it bogs and backfires a couple times and then runs great only does it once when first starting off
have replaced timing belt igniter cap rotor plugs filters etc..... car starts idles and runs great except for this problem please help also cleaned egr ports and egr valve no cel codes

 

A little more info please.....This is only when cold?

It will crank and idle fine (cold idle ~1,500 rpm's)?

If you let it warm up, idle drops to normal (~750 rpm's) and drive what happens?

 

thank you for responding.. car starts and runs fine, if the engine is completely warmed up before driving it has zero problems but if the temp is not at normal operating temp yet then the problem happens i put the car in drive within about 10 sec the car bogs and when i press the gas the engine wont rev past 1500 rpm then it sounds like it backfires once or twice and then it runs well this problem only happens at about 5 mph i have had this car for 4 months i have used this forum to fix just about everything on the car(it was not taken care of by previous owner) after reading alot of posts about egr i removed the valve and cleaned it also pushed diaphram and engine died so seems to be working? also car shift at 4500 rpm wot seems to hit rev limiter if held in gear at 5000 rpm

 

No codes and only in "open loop".....

When "tending" to things, did you give the tb a real good cleaning? Both sides of the butterfly, the sides of theteb where the butterfly would be at when closed. I'd then clean the two ports to the IAC and the FITV....check and adjust the FITV.