I am TC and am running the emanage. I just recently replaced a HG and about a week ago had the valves adjusted. I keep throwing misfire codes for all cylinders anda random misfire code. This has happened 2 times in the last 2 weeks. I don't understand what could be causing it.
I keep looking for mayonnaise on my dipstick and oil fill cap. Plugs look fine. I pulled the freeze data and it just told me that for the misfire in NO.1 was at 1686 rpms and pretty much a cold car at 0mph.
What else should I look for?
Could it be gas from the station that I have been going to for awhile?
possibly a loose intake manifold connection that is allowing a small amount of coolant into the combustion chamber?
What can cause all 4 cylinders to misfire at such a low rpm?

I am also getting a miss at 3500rpms. Its very interesting that it only hits at that certain range.

Thanks for reading.

 

 

Any CEL codes?

It seems most of the misfire issues point to injectors. Try a new set.

 

yes all of the codes. I have a code reader and always pull the codes.
rc 650's aren't exactly cheap. I guess I could mail them in and have them flow tested and cleaned. Any other suggestions?

 

If it makes you feel any better, I just bought my 02 AP1 with 32k miles, bone stock, and it just started throwing the random misfire and misfires for cyls 1,2, and 4.

It had the spark plug recall done, and just before I bought it, the last owner had the coilpacks replaced. Now its back at the stealership.. err, dealership. They are baffled, and are calling in a Honda service rep. to look it over and proceed.

The misfire is perhaps the bane of my existence. I can do the O2 sensors, and a bunch of other codes, but misfires are no fun. Good luck!

 

bump for any other advice on this situation

 

I have the same problem had honda do a burn test they said it was bad gas. So I ran a fuel injection clean through the car and it solved the problem for a little while. I got injectors for an 04 out of a wrecked car and haven't had a problem since. Most of the time random mis-fire codes are produced by dirty injectors. Try the fuel system clean first if that doesn't solve the problem search around and try to get injectors for an o3 or up the 00-02's had the problem of clogging more so than the others. Hope this helps.

 

I have rc650 saturated injectors as my car is turbo charged. I am not saying they aren't dirty. I will try the fuel system clean as recommended though.

 

i have a 2003 with 24000 on my car bought it three weeks ago and i just recently started to throw a cel light (random misfire and cylinder 1 misfire) so i change the plugs and bought new cell packs same code. so today i went and had a compression check came back 140,240,240,240. I have a bent valve..... also if you look a few treads down there a guy with SN of mikerino same problems same solution he also had a bent exhuast valve... Just a thought i'd let you know my problem and solution so far.....
Chris

 

I had a misfire in 3-4, ended up being a valve adjustment exhaut valve were tight
47000 miles, stealership said adjust them every 30000 miles