drifterwanb666
OBS Enthusiast
ill start off with this.
1996 chevrolet tahoe, 4wd. l31, 4l60e.
in my quest of just a better daily driver ive gone too far, by accident or stupidity. im not sure.
heres what ive done to the truck;
"RV" cam, (dr.bumpstick), new roller lifters, hardened pushrods, roller rockers, new springs, lapped valves and remanned heads, high volume oil pump. thinking of adapting an LS throttle body since the OE one leaks vacuum thru the shaft seals, also has long tube headmans, 2.5" exhaust with an X pipe. transmissions been rebuilt with a "tow package" since i do haul more then ass with this thing. got a tuned PCM from blackbear and had the rear 02s deleted, NOT the front. EGR deleted. and tuned for my set up. i dont want to go further then what ive done on this tahoe, ill save my "race truck" ideas for another.
now heres the issue; besides the fact shes tempermental, the truck will not idle. (these issues happened before and after tuned PCM) itll almost stall out and then idle way high and come back down to almost a stall. does this until it finally stalls or i start driving it.
now for driving; itll intermintantly run like complete dog ass, missfire every cylinder, barely move down the road, hold RPM way too long, and slam into gear. then outta know where itll act right and shoot my RPMs so high i git 6k cause im basically flooring it trying to go 40mph. now sometimes itll go back to running like dog ass after, and others itll run fine but the idle is at around 2500rpm, and will stay like that until i come to a complete stop, idle drops to around 800rpm, and the cycle continues.
now today i came to a full stop twice and the cycle did not continue. but the rpm did stay around 2500 until i did a coplete stop, went to around 800rpm and took off from there no problem.
ive checked all sensors, all continuity, all resistance, replaced parts, checked powers and grounds, ect. thrown codes for MAP, baro/map, TPS, knock sensor, and both upstream 02 sensors. replaced all, and codes still came back. so i put the OE parts back on. the 02 codes are known, but the others are new with this blackbear PCM.
with this i ask, what in the name of all thats holy am i doing wrong, or missing here? i have this one vehcle and its all i got. im so stressed and angry im tempted to junk it sometimes. plan on calling blackbear and seeing what they say, as im not fully happy with it as it is.
1996 chevrolet tahoe, 4wd. l31, 4l60e.
in my quest of just a better daily driver ive gone too far, by accident or stupidity. im not sure.
heres what ive done to the truck;
"RV" cam, (dr.bumpstick), new roller lifters, hardened pushrods, roller rockers, new springs, lapped valves and remanned heads, high volume oil pump. thinking of adapting an LS throttle body since the OE one leaks vacuum thru the shaft seals, also has long tube headmans, 2.5" exhaust with an X pipe. transmissions been rebuilt with a "tow package" since i do haul more then ass with this thing. got a tuned PCM from blackbear and had the rear 02s deleted, NOT the front. EGR deleted. and tuned for my set up. i dont want to go further then what ive done on this tahoe, ill save my "race truck" ideas for another.
now heres the issue; besides the fact shes tempermental, the truck will not idle. (these issues happened before and after tuned PCM) itll almost stall out and then idle way high and come back down to almost a stall. does this until it finally stalls or i start driving it.
now for driving; itll intermintantly run like complete dog ass, missfire every cylinder, barely move down the road, hold RPM way too long, and slam into gear. then outta know where itll act right and shoot my RPMs so high i git 6k cause im basically flooring it trying to go 40mph. now sometimes itll go back to running like dog ass after, and others itll run fine but the idle is at around 2500rpm, and will stay like that until i come to a complete stop, idle drops to around 800rpm, and the cycle continues.
now today i came to a full stop twice and the cycle did not continue. but the rpm did stay around 2500 until i did a coplete stop, went to around 800rpm and took off from there no problem.
ive checked all sensors, all continuity, all resistance, replaced parts, checked powers and grounds, ect. thrown codes for MAP, baro/map, TPS, knock sensor, and both upstream 02 sensors. replaced all, and codes still came back. so i put the OE parts back on. the 02 codes are known, but the others are new with this blackbear PCM.
with this i ask, what in the name of all thats holy am i doing wrong, or missing here? i have this one vehcle and its all i got. im so stressed and angry im tempted to junk it sometimes. plan on calling blackbear and seeing what they say, as im not fully happy with it as it is.