Jump to content

Intermittently Lean


Recommended Posts

hello all,


I am having an issue with hesitation under load.


mods are:

turbo back exhaust

grimmspeed catless uppipe

DW300c Fuel Pump

ID1000 Injectors

Grimmspeed 3 port EBCS


base tune for e85


I have spent the past two days working with a mechanic running diagnostics on the potential causes of the hesitation. first, we have checked every area for vacuum leaks. I purchased a MAF to see if this may have been the culprit, no luck. checked spark plugs and coil packs on cyl 1 and 3 all look good, gaps are in tolerance and are not fouled. all injectors are firing.


the A/F ratio hovers around 14.5-14.8 on idle. and most of the time it will stay in that range, however i sometimes get to an A/F value of 20 and this is when it really starts getting jerky.


i have come up with two conclusions one, potential electrical issue shorting of a wire or ground maybe. another thought is fuel pressure may not be as high as needed, but this does not really make a whole lot of sense since it doesnt just happen when it is under load.


any ideas guys?


Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...

Important Information

Terms of Use