I've asked this question a couple of times, but I've never gotten an answer.
So please shoot me some input, any ideas are appreciated.


I've got a '90 RS 305 TBI, and if I shift from 1st to 2nd and resume the throttle at maybe 1/4 throttle it feels as if the car is "missing" but not in an ignition sense, I think it is a fuel issue.

This only occurs at around 1/4 throttle, if it starts doing it and I step on it, the problem immediately goes away and it pulls.

What could this be? Could the injectors be plugged a bit so at low pressure fuel injection the pods don't work as well as they do at full throttle when they're spraying at full pressure?

What I immediately thought of was a low speed circuit of a carb, it feels as if that circuit could somehow be plugged or not working as well, because this only occurs at 1/4 throttle, but I'm not sure whether a TBI has these same circuits.

I appreciate any help given.

 

Is the ses light on? if so is there any codes?

 

check the throttle position sensor, sounds to me that it could be this

 

No codes are being thrown, it's not a severe problem. I'd just like to figure out what it is.

 

Another possible culprit I think could be the clutch. I think the "slip point", if you will, has perhaps moved farther toward me and it now engages, rather disengages (the disc) at a different point. Could this be the hydraulic fluid in the cylinder? Maybe the free play needs adjustment?