I have a SOHC turbo, with a 255 Walboro, running a FMU/missing link. It has been running strong for over 5,000 miles. I have just recently got a check engine light for a misfire in the 4th cylinder. I have changed plugs around, wires, cap and rotor look new, but i still get this code. Any other ideas? I want to get a compression test soon too.

Anyone else come across this problem?

 

Compression test cyl #4?

 

Well its been a while but I finally comp tested cylinder #4.

190. WTF?!?!?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by japearl &raquo;</TD></TR><TR><TD CLASS="quote">Well its been a while but I finally comp tested cylinder #4.

190. WTF?!?!?</TD></TR></TABLE>

What are the other cylinders at?

 

i cant remember, which is sad. but when i first checked them they were like this somewhat

190 170 180 190

ill haev to do all of them again.

 

Still have this problem

 

ditch that manegment

 

get your ecu chiped...then u can permenately get rid of that code

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by portenio78 &raquo;</TD></TR><TR><TD CLASS="quote">ditch that manegment </TD></TR></TABLE>
thanks for the help
honda-tech will forever be infamous for people that aren't able to answer questions.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2k.civic.si &raquo;</TD></TR><TR><TD CLASS="quote">get your ecu chiped...then u can permenately get rid of that code</TD></TR></TABLE>

I plan on getting it chipped soon and actually getting tuned, but for the meantime this amber check engine light is annoying the **** out of me. Anything else?

For those of you still intrested, I changed the cap, changed the plugs, wires, injectors, etc. Still getting the same problem. Car runs fine, pulls hard, no sign of a misfire.

 

the problem is it's an sohc james

 

get your ls running and we will see who is
ha.

 

ok I came off the wrong way. Just chip it and you be happier prolly with just the base map...then go from there to get it tuned. Good luck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by portenio78 &raquo;</TD></TR><TR><TD CLASS="quote">ok I came off the wrong way. Just chip it and you be happier prolly with just the base map...then go from there to get it tuned. Good luck. </TD></TR></TABLE>

It's cool. Well Thats the plan. I have everything I need, just need to find a person to make a basemap for me

 

before i goto bed bump

 

mercer county college bump

 

im going to try a new dizzy and get a compressoin test done tonight.

 

was told to check coil and egr as well. bump

 

i was throwing misfire codes for a long time.. sometimes it would actually misfire and sometimes not. i changed the usual ignition parts and the same problem was there..

finally i started getting a bad misfire in cyl4 and it was the distributor. after the new distributor the car is running way better then it ever did..

good luck .. misfires suck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by japearl &raquo;</TD></TR><TR><TD CLASS="quote">I have a SOHC turbo, with a 255 Walboro, running a FMU/missing link. </TD></TR></TABLE>

What is your plug gap? Have you been losing any coolant at all? One last thing is your running a intank pump with a fmu. The fmu requires a inline fuel pump to provide enough pressure for the fmu to supply the fuel you need.

With no inline pump and no timing control/retard you are running lean and could very well have detonation. Id say the code is the start of a major problem that will appear here soon.

 

might buy a new dizzy tomorrow at napa.

 

adjust your valves, maybe they are too tight..

I had this same problem on my teg.. changed everything that you can imagine.. for a stupid tighten valve..

 

try to change the plug wires. had misfiring problems with a customers b20vtec after changing almost everything prob. was still there till we decided to change the wires.

 

did the wires already. Ill double check.

 

I just recently tested the obd1 ecu i wanted to use in my car, with the conversion harness and everything. I plugged it in to see what codes i got.

I got a vtec solenoid code (because my car ain VTAK)
and a IACV code, since i need to convert to a 2-wire one.

How come the code 74 doesn't transfer to being a problem on the obd1 ecu?
Since I'm tuning on this ecu, I want this ecu to work, I'm not worried about the obd2 one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nsxmatt &raquo;</TD></TR><TR><TD CLASS="quote">The fmu requires a inline fuel pump to provide enough pressure for the fmu to supply the fuel you need.

With no inline pump and no timing control/retard you are running lean and could very well have detonation. Id say the code is the start of a major problem that will appear here soon.</TD></TR></TABLE>
I agree with Matt. ^^^

Have you done a compression test yet?? My guess is that the 4th cylinder may be on it's way out - check for oil on the plug.