I think that I am finally fed up with this stupid truck....I've tried everything...cleaned the EGR, replace the cap and rotor and plugs (twice) cleaned the IAC out etc...I just got finished replaceing the plugs for the second time, this time with autolites, and the thing is still running rough, Ive replaced the FPR, seafoamed it etc.......when I was changing the plugs out, all 3 on the passengers side were fouled, the the three on the drivers side were good...I don't understand.....what is going on with this thing??? I think that the FPR had something to do with the fouling of the 3 on the passenger side, but I replaced that, and tried everything I can think of, and the thing is still idling like it has a miss, I did the gap on the new plugs @ .045 like it says to do on the Emissions sticker, so what gives?? I guess that Im just pissed that I can't figure out what is wrong with this damn thing. I may just throw it away, have a tow truck come and drop it off at the local junk yard.....I don't have the money to replace the EGR, the MAP, the IAC, and the TPS right now.......I wish that I did cause I would just replace them all, and I would probably still have a rough idle.....I don't understand it. I've never had this much trouble with a vehicle in all the years that I have had one. I think it is time for the LT1/T56 swap.....**** this stupid CPI crap. Maybe I will just carb it and be done with it. Does anyone have any input???

 

mine did the same. it was the spider injector in intake plenum leaking 94 s10 4.3 (w)

 

Yup, definitely sounds like you have a leak in the CPI spider.

 

so that means another 300 bucks....I guess I will live with the rough idle for awhile.....darned thing. CURSES!!!!

 

got mine from rockauto for 130 less 45 when i sent old ones back

 

have you tryed putting some napa injector cleaner in?you might want to check and see if intake is sucking air with a can of WD-40.you might be able to take the pletium off and check spier injector for leaks .
take pletium off turn key to on possition and look at injector hope this is helpfull and fairly cheep..

 

When I pulled the Plenum off to replace the Fuel Pressure Regulator, I checked the pressure with the key turn, it was leaking before I replaced it with the new one, but wasn't leaking that I could tell after it was replaced....maybe it is leaking again...or it is leaking very small amount now...how good is a remanufactured part from GP sorenson? it is like 144 bucks on rockauto....does anyone recommend this?? Thanks!
Ryan