msrothj2009

ok so here is the issue i have a 98 honda prelude base model i ran a diognostic which went as follows
p0304 cylinder 4 misfire, p0303 cylinder 3 misfire, p0302 cylinder 2 misfire, random misifre detected , p1399 random/ multiple cylinder misfire, and exhaust gas recirculation flow insufficient
i have made sure i have oil and havbe recently replaced the plugs and wires with ngk plugs pre gapped and bwd wireset with new distributor and verified that wires are ran to the propper cylinders so at this point i am at a loss with what needs to be checked/done if anyone can help me out it would be greatly appreciated

Sparksman

Did you adjust the timing after installing the new dizzy? Or did you take to a shop?

Did you buy a oem replacement, dizzy or a local parts store dizzy? If its not a oem dizzy the rotors that come in the pars store distributors are super cheaply made... Replace that with a oem one, not saying its the answer to all your problems. But it couldnt hurt the situation.

Don Jefe

Not sure what impact it would have on your mis-firing issues but I would address the EGR issue by thoroughly cleaning it (carb cleaner) or replacing it. More than likely you've accumulated a lot of carbon.

msrothj2009

i havent taken it to a shop or adjusted the timing due to lack of money and tools but i bought the oem replacement

Sparksman

lol if youve never adjusted your timing after putting a new one on im almost 100% sure thats your issue. Theres two timings mechanical and ignition. Ignition timing is your sparking of the plugs. Buy a timing gun for like $20 bucks and just do it yourself. Takes 20 minutes and isnt difficult.

msrothj2009

also just ran a compression test cyl1 160, cyl2 35, cyl3 160, cyl4 160. car also isnt backfiring or sounding like its missing at all.

holmesnmanny

ok so something wrong with cylinder 2..you need a leak down test to verify where the issue is...it's safe to say it's not a leaking head gasket