I have searched around for a while on this and keep coming up boggled. I have more or less slowly noticed that my car has been losing power. now it is horrible. I am within 5000 miles of a fresh rebuild. im running a well rewired walbro 255 with no regulator 
(suspect one). 2g pistons, ported 14b. stock ngk-r plugs (new last summer and next to no miles). i notice at any throttle pos im having bad stuttering problems. i have noticed that i probably do have fuel over run till i build decent boost, but am fairly convinced that this isnt the problem. air fuel guage seems relatively normal, occasionally sticks at full lean when just cruising (new oem o2 sensor and its on a standard air fuel guage -autometer-) im sure it is an ignition problem for instance when im crusing at about 60 drop fast from 5th to 3rd and nail it it will hessitate a ton and then i can hear what from all occurances sounds like a fireball ignited and running through the full length of the exhaust system (im sure this is followed by a nice fire ball) i have not had anyone witness this- . the thing that boggles my mind is that i thought it could all just be a realy bad battery ground (noticing some build up) i had an issue last week when i turned the car off and all power went off (seatbelt stopped half way) i put the key back in and gave it a turn and the car started right up . so i cleaned up the terminals on the battery very well and put it all back together (resetting the ecu in the process of course) went for a drive and the fuel over run thing was slightly noticable but a very different feeling. but that was the only problem. it was running perfect till about 30-40 miles later and it slowly got worse . i dont know what to do. i swapped out the coil pack.. no fix.. i have many spare parts laying around that i could try but this is driving me crazy. today when i would come to a stop it sounded like there was a large vac leak oor it was running on 3 cylanders and it would come and go under set circumstances. sorry for the length but if anyone can please help me out here... i just want to drive my car before snow falls.. thank you very much. EO.
(suspect one). 2g pistons, ported 14b. stock ngk-r plugs (new last summer and next to no miles). i notice at any throttle pos im having bad stuttering problems. i have noticed that i probably do have fuel over run till i build decent boost, but am fairly convinced that this isnt the problem. air fuel guage seems relatively normal, occasionally sticks at full lean when just cruising (new oem o2 sensor and its on a standard air fuel guage -autometer-) im sure it is an ignition problem for instance when im crusing at about 60 drop fast from 5th to 3rd and nail it it will hessitate a ton and then i can hear what from all occurances sounds like a fireball ignited and running through the full length of the exhaust system (im sure this is followed by a nice fire ball) i have not had anyone witness this- . the thing that boggles my mind is that i thought it could all just be a realy bad battery ground (noticing some build up) i had an issue last week when i turned the car off and all power went off (seatbelt stopped half way) i put the key back in and gave it a turn and the car started right up . so i cleaned up the terminals on the battery very well and put it all back together (resetting the ecu in the process of course) went for a drive and the fuel over run thing was slightly noticable but a very different feeling. but that was the only problem. it was running perfect till about 30-40 miles later and it slowly got worse . i dont know what to do. i swapped out the coil pack.. no fix.. i have many spare parts laying around that i could try but this is driving me crazy. today when i would come to a stop it sounded like there was a large vac leak oor it was running on 3 cylanders and it would come and go under set circumstances. sorry for the length but if anyone can please help me out here... i just want to drive my car before snow falls.. thank you very much. EO.
