Intermittent Bogging
 

First off some specs. Stock Y8 Block and Head with a 54 trim t3/t4 running crome using jd's y8 maps for timing. Car runs great some of the times. Other times it is a bitch and runs real real rich and misses. I dont think its a spark plug issue. Ive changed them a million times, with both bkr7e and bkr6e gapped between .028 and .032. I dont notice a trend between when it runs well and when it doesnt, except that maybe it runs worse at night, altho that could be total bullshit.

Any ideas on what could be causing it?

Re: Intermittent Bogging
 

you just need to fine tune your map, thats all. datalogging does wonders.

Re: Intermittent Bogging
 

Zero clue, bro.

Re: Intermittent Bogging
 

WEll its not that its certain parts of the map, its just certain times. Like it'll be fine for a while, then it goes all rich

Re: Intermittent Bogging
 

when you say all rich, do you mean like your WB pegs competely rich for the entire run time? or for only a moment?
How long is intermittent?

Have you messed with the MAP sensor wiring? Loose/shitty wiring (if its the right one), will cause the ECU to see max MAP reading sporadically.
Thats my Ediagnosing shot in the dark hahah.

Need more info. ----, a Dlog of it occuring would be primo box.

Re: Intermittent Bogging
 

ill try to get a log of it tomorrow. For example, I could drive to work (~10 miles) and itll be fine, but on the ride home itll be a bitch. Rich as in about 10 AFR. Right now i'm using a stock map sensor with a molex computer connector hooked up to it..i have also ran a moto 2.5 sensor. I'll try the moto out again to be sure

Re: Intermittent Bogging
 

log it, and take note of the MAP readings at cruise.