What would cause my ride to lean bog? My entire ignition has been changed so I know it's not spark related. When driving at constant speeds or accelerating under light throttle, the car will bog repeatedly and the wideband will show the AFR going lean, normal, lean, normal. Every time it bogs the wideband shows lean.

My assumption is that this is fuel related but what component of the fuel system is most likely to cause such a symptom? Sticky injectors? Clogged fuel line? Bad fuel pump? I know it's not the fuel filter cause I changed it and it did nothing.

 

vacuum leaks can cause a lean condtion..

 

I got the same thing going on. Check out my thread
https://honda-tech.com/forums/drag-racing-36/completely-stumped-problem-500-whp-del-sol-2809840/

I have replaced a bunch of stuff and it still has the same problem. Guess I gotta keep at it.

 

I redid all of my vacuum lines but I think, just maybe that the little vacuum line going to my boost gauge might be the culprit cause it's a pretty halfass job. Mind you I'm still pretty sure it's fuel related.


What have you changed so far? Too lazy to read it all, lol.

 

re do that vacuum, your car maybe suckn in unmeasured air

 

Another thing I forgot to mention is that my AFRs all all over the place when driving. They continually go leaner, richer, leaner, richer. When it bogs it goes really lean. I think this sounds like a stuck injector or something no? Must be something injector related cause as far as I know fuel pumps usually just go don't they?

 

maybe a relay?

 

Is the car tuned? Is it in open or closed loop? More information on your setup would help. If its in closed loop it sounds like the closed loop corrections needs to adjusted

 

It's a B18B, stock internals, .50 a/r t3/t4, 7psi, dynotuned on hondata s200 (old setup). I was reading in other threads about corrupt calibration files, I wonder if this could be the case in my case. Cause not only does it lean bog but it runs rich at idle, very rich when you give it anything more than 20% throttle in gear. It wasn't like that when I first got it tuned...

I was already planning on getting it retuned with ECTune by another well known tuner in my area but I want to make sure my car doesn't have any mechanical problems before I bring it to be retuned.

 

Another thing to mention is that when I take the plug wires out of the engine one by one at idle, the idle doesn't change when I take the 3rd cylinder wire off. That and I tried putting new plugs in and letting it idle and 3 of them were black and one had practically nothing on it. Is this an injector or a blown cylinder?

 

Do a leak down, maybe bent valves in that cylinder

 

My mechanic just did a valve adjustment on the engine last week. Wouldn't it have been obvious at the point in one of the valves were bent?