trucktbi
05-19-2020, 08:10 AM
hi i have few question and was hoping for advice/help
i got an old 60's chevy truck and someone swapped a tbi engine in it .
truck does not go over 50mph...no power. it feels good around the block but not on freeway....pedal on the floor and it feel like i dont go faster than the tembleweed
truck always start the first time
it idle good.cold around 1300 rpm warm arond 900 rpm
when i drove it around the block and got it warm it would stall at a stop sign / red light/on gears . but not in park
no back fire at all
spark plug look good may a lit bit on lean side...but just a bit
did a compression test and its fine
fuel pressure 12 psi
vacum gage 21
tps is good
injector are good
new fuel filter
gas tank clean
throttle body super clen
i checked the timing , timing is a 0 with the advance wire unplug ( i find out the timing light flash was not consistent ...sometime i can see a dead spot...not constant.. i tried different wires ans swap spark plug its still does it and not matter what cylinders i have the timing light connect to )
wiring was a little jack up but was able to rewiring the obd connector to get the code out.
here the code and here the real trouble .
#31??
#32
#32
#34
#41
#43
#52
#54
#55
ecm
SERV NO 1227747
86 ANLW K391031991
i cleared the code... scanned it again .. find less codes but newer ones like #25 #35... turn off the keys..clear code again..
grounded ( A12)ecm directly to battery , scanned again
and all the first 9 codes came back
before i start to chase ghost and stuff........
do you guys think it could be a faulty ecm ?
i got an old 60's chevy truck and someone swapped a tbi engine in it .
truck does not go over 50mph...no power. it feels good around the block but not on freeway....pedal on the floor and it feel like i dont go faster than the tembleweed
truck always start the first time
it idle good.cold around 1300 rpm warm arond 900 rpm
when i drove it around the block and got it warm it would stall at a stop sign / red light/on gears . but not in park
no back fire at all
spark plug look good may a lit bit on lean side...but just a bit
did a compression test and its fine
fuel pressure 12 psi
vacum gage 21
tps is good
injector are good
new fuel filter
gas tank clean
throttle body super clen
i checked the timing , timing is a 0 with the advance wire unplug ( i find out the timing light flash was not consistent ...sometime i can see a dead spot...not constant.. i tried different wires ans swap spark plug its still does it and not matter what cylinders i have the timing light connect to )
wiring was a little jack up but was able to rewiring the obd connector to get the code out.
here the code and here the real trouble .
#31??
#32
#32
#34
#41
#43
#52
#54
#55
ecm
SERV NO 1227747
86 ANLW K391031991
i cleared the code... scanned it again .. find less codes but newer ones like #25 #35... turn off the keys..clear code again..
grounded ( A12)ecm directly to battery , scanned again
and all the first 9 codes came back
before i start to chase ghost and stuff........
do you guys think it could be a faulty ecm ?